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FAQs – How to Paint uPVC Windows and Doors

uPVC windows and doors are rife in the United Kingdom. There was a boom in the 1980s as they rocketed into fashion for their weather-resistant and long-lasting qualities.

If one scours the internet forums for frequently asked questions such as “can you paint upvc doors” and “can you paint upvc window frames“, however, they remain a hotbed for misconceptions and frustrations.

When trying to make office blocks look less tired, or shop entrances more up-to-date and chic, there is nothing worse than tired windows and doors. These are the perils of uPVC that is 40 years old. What was wrong with wooden frames? How about some vinyl? And most pressingly, please oh please, can you paint uPVC doors and window frames?!

uPVC paint has become far more economical and is now readily available at Rawlins Paints in 4000+ colours (yes, including grey uPVC paint!). More and more contractors are using uPVC paint spray to give doors a fresh look, using a process that can be done in a day!

We at Rawlins Paints are here to dispel some of these other misconstrued myths and come up with some solutions that can give your business an affordable, enticing and professional appearance without the need for new, expensive windows or doors.

It could be a restoration job on an office needing TLC, a touch up on a house for sale, a B&B or shop needing some nip and tuck to ward off some stiff competition! Perhaps you know a school or youth centre looking for a fresher, younger look.

Quick links:

What is uPVC and why is it so popular in the United Kingdom?

Unplasticised polyvinyl chloride (uPVC), or vinyl siding as it is known in the United States, is an energy-efficient plastic often used for window and door frames. It is rigid, which means it will not change shape in the heat of the sun, and it is also recyclable. It is not biodegradable I hasten to add, but at very high temperatures it can be remoulded and repurposed.

It is also an incredibly safe plastic, more so than polyvinyl chloride (PVC), as it has no hazardous phthalates or Bisphenol A (BPA). It is also fire-resistant, giving it an advantage over wooden frames.

Note: There is more about BPA in coats and varnishes on our Food Safe Paints blog.


Can I paint uPVC?

Absolutely! As long as it is not brand new. This is unlikely to be the case in 2018, just choose a different colour from scratch, but it is much harder for a paint to bind to new uPVC due to the manufacturing process. Keep following our guide below and learn how to paint plastic window frames and other uPVC surfaces.

Nevertheless, it is vital to pick the correct paint! And that is where we can help.

You will need a paint that will BOND with the substrate rather than just try to stick to it. Whilst more rigid than PVC, uPVC will have thermal movement (expanding and contracting a little in the heat). Even in our UK climate, the area between glass and wall at the front of a shop or office block is exposed to very high heats. Therefore, you will need a paint that offers UV protection.

Which Products Should I Use?

Zinsser have an excellent range of paints that can be applied to uPVC together:


Bulls Eye 1-2-3 Plus is dubbed as the ‘next generation’ of all-surface paints, working as a primer, sealer and stainkiller in one. It contains Hydro Pliolite, a revolutionary trademark-protected resin that has excellent adhesion and stain prevention. It has a biocide in its makeup that protects from mould and mildew in high humidity areas such as bathrooms and kitchens. It has rust-inhibitors if your front door is getting the treatment. It even fights off water and smoke stains and can be re-coated hourly! All in all, it’s more of a ‘Treble 20’ than a Bulls-Eye this, but that’s not quite as catchy now is it?

Zinsser AllCoat Exterior is an ideal product for painting over uPVC. It comes as a water-based and solvent-based product, with Matt, Gloss, AND Satin finishes. It is also re-coatable in one hour, promises excellent colour retention, and resistance from cracking, blistering and flaking.

One of the real strengths of the AllCoat Exterior is its ability to create a good finish from a brush or roller. It comes as a spray and this is also straightforward but having the ability to create a high specification finish with a brush gives the proprietor the option not to call a contractor.

It comes in a HUGE selection of RAL colours, giving you the freedom to really make your windows pop, or to opt for a darker door that oozes prestige. Not only do we offer RAL colours, RAL Design, BS and NCS, we would offer bespoke colour matching if a sample were to be sent in.

You will notice that both products have impressively fast re-coating times. This means you can get this job done in a day. The front door is used by most of us at least once a day, so its efficiency coincides with convenience.

If possible, try to avoid using the solvent-based version of the AllCoat Exterior on uPVC. If at all, do so in the winter months. Give us a call if you’re unsure.

There are also multi-surface paints available from Rust-Oleum and Bedec that can be applied to uPVC.

Rust-Oleum CombiColor Multi-Surface is a quick-drying paint that can be used for your interior and exterior, comes in White, Black, Daffodil Yellow, Light Ivory, Zinc Yellow, Flame Red, Gentian Blue, Moss Green, Silver Grey, Light Grey, Cream, and Traffic White. It works as a primer and topcoat in one.

Bedec Multi-Surface Paint is a non-yellowing, water-based paint that is quick-drying and environmentally friendly. It has low VOC content and is very flexible which makes it optimal for uPVC. It comes in a number of colours including Soft Mint, Soft Pink, Butterscotch, Blush, Chocolate, Brazil, Oxford Blue, Silver and Gold.  Like the Rust-Oleum paint, there is no need for a primer.


Do you have to prepare or prime the uPVC before painting onto it?

ALWAYS prepare the surface appropriately before using these paints. The surfaces must be dry, clean and free of any debris such as mould or dust. If you are using the Zinsser products, they have pre-treatment products such as their Mould Killer if that is the issue. Make sure the surfaces are sanded so that the brush can achieve a seamless stroke.

After that, degrease the area with methylated spirit and allow it to dry. After this, you should be ready to prime using either Bulls Eye 1-2-3 or Bulls Eye 1-2-3 Plus, or apply your first paint coat.

If you are using AllCoat Exterior Matt (Water-Based), you will need to use Bulls Eye 1-2-3 as a primer.

If you are using the Gloss or Satin finish however, you will NOT NEED A PRIMER. You can apply the first coating of your paint on immediately after the surface preparation. Wait for this to dry, then apply the second.

Are there colour options for painting uPVC?

There are, in abundance! The most popular colours you see walking along the street are white, black, grey, faux oak (or folk if you’d rather), and darker green or blues.

The Zinsser products (others also,) can be tinted to almost any shade in the RAL colour scheme. Give us a call for more advice.

I mentioned schools and B&Bs that may be looking for rejuvenation or renovation. This enables you to give your windows a really welcoming, warmer colour.


Can I spray paint it? Or should I use a brush?

You will find that a lot of professionals use uPVC spray paint. It solidifies in around 30 minutes, takes roughly 3 coats, though that will depend on the colour being used.

However, if you are painting a front door for example, this can be incredibly fiddly as you would need to take it off its hinges to truly protect the brickwork around it. Without the proper equipment, roller or brush may well be the safer option.

Using a paint brush allows you to get around any fiddly design work (with a teaspoon of stealth) and is easy to touch up if you feel like you missed a bit. Do be aware of leaving brush marks though, by over-coating in some areas more than others. The worst that could happen is it leaves a wood-like finish, but it can be avoided if unwanted.

Can I use the same paint on the inside and outside of the building?

If you are looking to paint interior doors, Zinsser’s Perma-White (Interior) is a market-leading choice for combatting mould and mildew in environments with regular temperature changes.

It is used in halls of residence, leisure centres, laboratories, breweries, dairies, hospitals and hotels – anywhere which sees large amounts of condensation and higher temperatures.

It comes with a 5 year guarantee against recurring mould (when applied effectively) and has been proven in several US labs to be the most combative product against black mould and other hazardous mildews. It also comes in a variety of colours.

The full Perma-White brochure is on our website here.

Alternatively, the Rust-Oleum Combicolour mentioned earlier can be used internally, if you are looking for uniformity throughout. Additionally, Zinsser’s Allcoat Exterior (Water Based) Matt, Satin and Gloss finishes (mentioned earlier) can be used on most indoor surfaces, including uPVC, as well as outdoors, and are available in over 400 RAL colours.

We are here to help!

If you fancy a go at painting your own uPVC, give us a call and we will talk you through it. We can offer advice on which paint will be best for you, talk you through some colour options and advise on whether you need a primer or any preparation products. Our Technical Team are available on 0113 245 5450, or you can email us on [email protected]. Further still, feel free to leave a query on the comments section below.


  1. Hi, just an enquiry really, we have upvc fence panels in our garden but they have discoloured over the last couple of years. Will the bulls eye 123 paint work on it? The fence panels were brown and we would like to do them the same colour again. Thanks

    • Hi Stephen,

      Zinsser Bulls Eye 1-2-3 would be fine as a primer but something like Zinsser AllCoat Exterior Satin (Water Based) can adhere directly to the UPVC without the need of a primer and is available in nearly any colour of your choice.

      Best regards.



        The finish is flaking off my composite door. The rosewood colour is okay not too bad underneath. Do you have a rosewood varnish I could put over the door or what do you recommend?

        • Hi Audrey,

          We don’t offer any translucent products for this application, our best recommendation for composite doors as an all-in-one would be the Zinsser AllCoat Exterior (water-based) Gloss or Satin. The product has excellent colour retention and adhesion to most exterior surfaces, bare or previously painted, including wood, metal and UPVC.

          Two coats are required, the first coat acts as the primer and the second seals and protects the system. It can be applied by either a brush or a roller and is re-coatable after a minimum of 1 hour. It is fully tint able so you can choose any colour from the RAL, NCS or BS colour charts.

          Always ensure that the surface has been prepared sufficiently, the Zinsser Universal Degreaser & Cleaner is ideal for this or alternatively you can try hot soapy water then rinsed with fresh warm water to remove detergent and when dry a good wipe with methylated spirit. As composite surfaces tend to have a wax like finish we would also advise lightly abrading the surface area. You should make sure the conditions are favourable during application, we recommend a temperature of above 10⁰C for water based products and the relative humidity is less than 80%. Ensure that there is no risk of rain, fog, frost or condensation from affecting the applied paint before it has had a chance to fully cure.

          Zinsser AllCoat Exterior Satin (Solvent Based) can be used in the same way but a coat of Bulls Eye 1-2-3 should be applied first when using Zinsser AllCoat Exterior Gloss (Solvent Based).

    • Hi just a quick enquiry. What type of sprayer would you recommend to use with your paint range for pvcu windows and doors. Many thanks

      • Hi Carl,

        Thanks for your enquiry – you can download data sheets from the “attachments” tab on any product page for advice on spray set ups for that particular product, if applicable.

      • Good afternoon,

        Having just painted the lintel above the kitchen door I’ve realised I’ve damaged the French door with the heat gun….

        Reading your info, am I right in assuming you have to sand the UPVC first so you get a”key “for the first coat of primer or whatever?

        • Hi Angela,

          Sorry to hear about the damage! Zinsser Allcoat Exterior Water Based can be applied to uPVC once it is cleaned and degreased, a light abrasion would also assist in providing a key but isn’t a necessity.

          Let us know how you get on.

    • Hi how do I repair a small damage to one hinge on the outside of my upvc French door.The paint has come of the door hinge .??Its only a tiny little piece.What do I use on it Please??

    • Good morning
      please can you advise if is possible to paint plastic gutters and drain pipes?

  2. Hi,

    I have uPVC windows with a ‘mahogany effect’ dark brown finish.

    Over time & probably due to temperature changes, the finish (which looks like sticky back plastic’ has shrivelled up & is starting to peel off.

    The doors & windows themselves are absolutely fine, it’s just the top layer that is showing its age.

    What would be the recommended solution to fixing this problem ?


  3. Hi,
    i am looking at a possible house purchase – the only thing putting me off is the dark wood UPVC colour window frames internally & on a conservatory. I am not bothered about outside being dark as my current house has dark outside,white inside.
    How easy is it to hand paint the inside to a lighter colour say white,ivory? How much paint do you need per frame / door – number of coats etc? and cost of paint please?
    What product would you recommend?
    sorry lots of question – but big purchase involved.
    many thanks in advance

    • Hi Michael,

      Thanks for your questions. The recommended products for your requirements are outlined in this article, and if you click through to the recommended products, the coverage rates are detailed in the product datasheets – please note that you may need more paint seeing as you are painting a light colour over a darker shade. Without knowing the size of the areas you wish to paint, I can’t give you a quote I’m afraid, but if you can measure them up, please contact [email protected] for a quote.

      You are able to paint over dark uPVC colours with a light ivory type colour though, so please browse the colour options in the products recommended in this article, and I am sure you’ll find something to really brighten the new house up with! Remember that some of these products can be used internally and externally, if you do want to have a more uniformed finish.

      Best regards.


  4. I want to paint mu pvc outside door. Am I corerect in thinking that ZInsser all coat exterior satin whater base is fine to use without primer.
    What preperation should i,due to previous owner having painted it use as it is flaking Can you tell me the available colours

    • Hi Mandy,

      Yes, Zinsser AllCoat Exterior Satin (Water Based) is fine on weathered UPVC without a primer. Preparation should be to remove all existing paint if this is failing, ensure underlying UPVC is then thoroughly cleaned and dry and then apply Zinsser AllCoat Exterior Satin (Water Based) directly in the chosen colour.

      The default colour for Zinsser AllCoat Exterior Satin (Water Based) when you land on the product page, is white. Simply click the “Choose a Colour” text, and you’ll see over 200 colour options!
      Please let me know if there is anything else I can help you with.

      Best regards.


  5. I have a upvc front door it is white . I want it black with crome accsesories added to it how do i do it ? It is a basic plastic door 2 straight glass windows at the top but i feel like a change can you please tell me what i need to get this door to the colour black matt thankyou sam

    • Good morning Samantha,

      Apologies for the delay in getting back to you.

      Yes, you can paint uPVC black, and most of the products recommended in the “Can I paint uPVC?” section (link here) of this article are tintable to black. It is best to check what finish you require – as some products are available in matt, satin or gloss finishes.

      Please let us know if there is anything else you can help us with, and don’t forget you can keep in contact with us through our Facebook page.

      Best regards.


      • Hi do I need to use a certain paint brush when painting upvc door, I’m using rystoleum paint.

        • Hi Susan,

          Am I correct in saying you are looking to use Rust-Oleum CombiColor Multi-Surface? If so, data sheets state the following regarding application by brush ‘Use natural bristles, long hair brushes. Thinning generally not required’. We do have a selection of brushes here, but you may have the recommended brushes to hand already?

          Please let me know if there is anything else I can help you with today.

          Best regards.


  6. Hi

    I have painted all my exterior woodwork – front door, garage doors, patio doors, eaves – with Farrow and Ball paint, colour is ‘Tanner’s Brown’. The window frames are all uPVC, a sort of reddish brown mahogany colour, and I would like to paint them in a colour as close as possible to Tanner’s Brown, or complementary to it. (They have to be some shade of brown – management committee rules unfortunately). Please could you recommend a colour or RAL for Zinssers Allcoat exterior paint?

    • Hi Tina,

      Yes, we are able to provide an accurate colour match (rather than recommend a RAL alternative) to Tanner’s Brown. If you contact a member of our sales team on 0113 245 54540, they can process your order today for this colour!

      Best regards.


  7. Hi can your paint be used for foiled windows?

    • Good morning Alex,

      Thanks for your question.

      If these are well weathered, give them a good clean, and from there, the Zinsser Universal Degreaser & Cleaner can be used to prepare the surface. Following that surface preparation work, apply 2 coats of Zinsser Allcoat Exterior (Water Based) Satin or Gloss in the colour of your choice.

      Please let us know if there is anything else we can help you with today, and don’t forget that you can also contact us through our Facebook page.

      Best regards.


  8. Hi I’m looking to paint the interior or my conservatory it’s upvc can I prime in 123 bulls eye then paint in a farrow and ball eggshell paint or would I you say I’m better to use a different type of paint ? Thanks suzie

    • Good morning Suzie,

      This would be fine as long as the F&B paint is suitable for the environment its been used.

      Best regards.


  9. When painting upvc front door with zinsser allcoat satin will a dry winters day be ok or should I wait until summer, or would the paint be difficult through drying too quickly in summer.

  10. Hi,

    I hope that you will be able to help? I need to put a cheap window in a hole in our new build and was wondering if I buy a new white UPVC window what is the best product for painting it dark grey?

    Many thanks

    • Good morning Kelly,

      The products we would recommend for the task at hand are listed and outlined in this blogpost. Full application and maintenance is also available on each product page.

      It’s definitely possible to do, and with the products discussed in this article, you’ll get a long-lasting and aesthetically sound finish.

      Best regards.


  11. I am Looking for advice on Painting UPVC , (RESIDENCE 9 CASEMENT ENGLISH OAK GLAZED window frames) .

    I only want to paint the EXTERIOR fames and I would like a stain finish. Colour to match RAL 7015

    Thank you in advance

  12. Hi

    Will i need to sand down a uPVC door before applying Zinsser Allcoat Mat and if so what grade of sand paper?

  13. Hello

    I’m looking at spraying some uPVC windows, doors etc in Allcoat Matt finsh. I’m going to be using a HVLP machine and just wondering if bullseye 123 and all coat can be sprayed through one?

    • Hi Jake,

      Thanks for your question.

      Zinsser do not recommend either of these products for application by HVLP spray, this method recommends that the paint be thinned too much – it would affect the properties and performance of the products.

      Zinsser Bulls Eye 1-2-3 can be applied by brush, roller, conventional spray (thin up to 10% with water / 50-90 psi) or airless spray .015”- .017” tip @ 2000-2500 psi.

      Zinsser AllCoat Exterior Matt (Water Based) is applied by brush, roller or airless spray – unthinned, .017” tip and high-medium (2000-2500 PSI) pressure.

      If you require any further help, certainly feel free to get in touch.

      • Hello,
        I wondered if the all coat satin finish water based would work on the exterior of a vintage and very small caravan?
        It’s currently peeling normal house exterior paint which was on when we bought and will need Sanding down to the original finish first, but the quote for a garage to spray paint is a lot. I’d like to be able to just brush this on and it look great!

        • Hi Gemma,

          Thanks for your question, I’ll ask the support team and will come back to you ASAP – can I ask what the caravan is made of, please?

  14. How long does the paint last on UVPC window frames. I was told it had to be done every two years , is that true?

    • Hi Sandy,

      Any of the Zinsser AllCoat Exterior range correctly applied inline with the manufacturers instructions would be expected to last up to 15 years.

      Obviously the performance of the system will ultimately be dependent on a number factors including, but not limited to the number of coats applied, preparation, weather conditions, etc. however we wouldn’t expect it to be reduced to 2 years unless there is something particularly onerous we are not aware of with this particular application.

  15. I’m looking to use UPVC cladding on a building and then painting it. you state that the paint will not stick to ‘new’ UPVC – would this be the case even after it was sanded and primed?

    If so, how long would I have to let it age before paining?


  16. Hi,
    I have a faux oak roll up electric garage door which I’d like to paint black to match my front door. Given the movement of opening & closing the door, would painting it work & if so, can you advise which products I should use?

    Many thanks,

    • Hi Suzi,

      Assuming the garage door is plastisol coated then we could recommend Rust-Oleum CombiColor for this application once the surface is clean and dry. CombiColor is very flexible so shouldn’t cause cracking etc once applied and fully cured. If you’re still unsure, feel free to contact our technical support team on 0113 2455450 (option 2) or send a message to [email protected], who will help find a suitable product for you.

  17. Mrs. Patricia Lloyd

    The windowsill of two UPVC south facing windows have started peeling off, the rest of the windows are in excellent condition. Would I be able to paint just the windowsills after removing the flaking UPVC and if I sent a sample would you be able to match it? Thank you

    • Hi Patricia,

      We have a blog post for painting plastic and upvc (here) with the appropriate steps to take for preparation, etc, but certainly contact our technical support team for more advice on 0113 2455450 (option 2) or send a message to [email protected].

      You can certainly mail in a sample for our team to have a look over – I’ll link you to our contact page (here) which has our office address on.

    • Hello,
      I want to paint exterior pvc door in darker shade of blue. I’d like to use Zinsser Exterior all in one Satin paint. I know that this kind of paint does not require a primer but I suppose that i can still use 123 Bulls Eyes as a primer in grey ? Thanks

      • Hi Eveline,

        Thanks for your question – Zinsser Allcoat Exterior Satin Water Based can be applied directly to uPVC without the need of a primer. Zinsser Bulls Eye 1-2-3 can be used to prime uPVC but isn’t required under Allcoat Exterior Satin.

  18. I would love to paint my upvc windows but the windows have white bars inside them. Anybody any solutions what I could stick on the glass maybe some windows film?

  19. Hi,
    I have just tried painting my upvc window with Zinsser exterior all coat satin white, however, the finish with both brush and roller is bad, granted I painted it on a very warm day but is there anyway of either thinning the paint down or an additive to alleviate the brush marks

    • Hi Peter,

      This sounds like Allcoat Exterior Solvent Based which, in warm temperatures, will flash off very quickly. We recommend using Zinsser Allcoat Exterior Satin Water Based which, if necessary, can be thinned down say 5% with clean water to slow down the drying a little further. Certainly feel free to give our technical support team a call on 0113 2455450 (option 2) or send a message to [email protected] if you require more help with the application.

      • Hi Kyle,
        I did use the water based version, but thanks for the information about thinning it with water, hopefully if I rub it down and paint it again using a diluted mix I will get a better finish.

  20. Hi Kyle

    I am wanting to repaint the outside of my old double glazing. The frames are made from aluminium which has a white finish. The finish now creates a chalky residue and the aluminium exposed in several areas because of damage by ivy.
    Can you please advise appropriate paints & primers.
    Many thanks

  21. all my windows and doors are uPVC, my question is are drain pipes and gutters uPVC or are they PVC as they all look the same ,,,,,Regards

  22. You state that it is easy to paint uPVC provided it is not new. I need to paint some new external cloaking profiles to match the non-standard RAL colour of some new aluminium windows. What is your recommendation?

  23. Hi
    My UPVC window frame is in need or painting it has been bleached by the sun and over 30 years old. Can you recommend a mahogany paint

    • Hi Mark,

      We haven’t anything currently to recommend in a finish that resembles wood but could offer Zinsser Allcoat Exterior Satin Water Based as we can tint to a shade of brown and can be applied to uPVC.

      The link to the product page is above for you to have a look at, as you’ll see we have hundreds of colour options to choose from.

  24. My porch is mahogany upvc and it’s peeling off in places
    1 Can I paint it white
    2 what type of paint would you recommend
    3 Do I have to remove all old upvc or just the flaking parts
    4 How much per litre for the appropriate paints

    • Good afternoon Mr Glass,

      In answer to your questions:

      1 Can I paint it white – yes
      2 What type of paint would you recommend – Zinsser AllCoat Exterior (Water Based) Matt, Satin or Gloss – you can find these product finishes, here
      3 Do I have to remove all old upvc or just the flaking parts – just the loose and flaking parts
      4 How much per litre for the appropriate paints – please see our website/products linked to in point 2 for pricing and data sheet for further information which can be downloaded from the ‘DATA SHEETS’ tab

      Please let me know if there is anything else I can help you with today.

      Best regards.


  25. Just prepping UPVC front door before painting – there are small screw holes from old doorbell.
    Can you suggest product to fill holes before primer coat.
    Thank you.

  26. Hello .I’ve got plastic /Pvc skirting boards that I want to paint from an oak colour to white ,what would be the best product to use

    • Hi Neil,

      We recommend our blog post “How To Paint Over PVC“; it has steps for cleaning and preparing, priming and finishing interior and exterior PVC surfaces, as well links to the recommended products available at our online store.

      Certainly let us know if we can be of any further help.

  27. Hi,
    I have a NEW uPVC window to paint, (it says not to pant new) what should I use?
    Or how long before it becomes old enough to paint?

  28. Hi there
    Some great information here, however I am a little confused. I want to paint the internal side only of my brown uPVC windows, do I need the Bullseye 123 plus primer, or can I simply sand, clean with meths and then apply All coat exterior? Will use of the 123 primer give a better, more durable finish?
    Finally as the windows will be open to paint should I use the solvent based version?

    • Hi Phil,

      Zinsser Allcoat Exterior can be applied directly to clean and dry uPVC without the need of a primer. The water based versions of Zinsser Allcoat Exterior are suitable for application in temperatures down to 10°C – if the ambient temperature is colder than this then the solvent based version would be advised.

      Let us know if we can be of any further help!

  29. Hello, I recently purchased this house, I would like to paint (internal side only) 2 french doors, they are faux golden oak UPVC about 10 yrs old. They are in my lounge which is south facing and gets a lot of sun, so much so that the flooring in that area is a completely different colour to the rest of the wood in the room, that’s another job I need to tackle! anyway.. it’s totally bleached so I assume I will need a paint for the french doors that can cope with the heat generated in this area from hot sun and changes in temp. etc. Right now in November that isnt a problem for application as it’s cooler and raining ! But my concern would be how it would handle the temp changes when the weather heats up next yr? Which paint option would be best? Any suggestions would be greatly appreciated. I would like a dark charcoal ish matt ish or low sheen finish if at all possible, Thanks so much for your time, Linda

  30. My windows are almost 30 years old and the window sills have yellowed over time. I’m looking for a product to make them white again. I don’t think there are any cleaning or restoring products that will do. Will they need painting and is it best to employ a professional. Thanks for your help.

    • Hello Sharon,

      Thanks for your question; as we’re unsure whether this is for internal or external window sills, I have put a recommendation for each below:

      Please note that the external recommendation is solvent-based due to the current cold temperatures. These coatings have data sheets to read on their respective product pages with information regarding surface preparation and application.

      If there’s anything else I can help with then please do get in touch.

  31. Hello, I would like to change my existing golden oak coloured UPVC, bay window frame to white (internal only). As replacing the windows is financially not an option, I wondered if a high end finish could be achieved by painting them? What would you recommend? Thank you

  32. How do I calculate how much Zinnser allcoat exterior (solvent) I need for say a 3 bed semi detached. I have both lower and upper elevation soffits and guttering as well as windows and an electric up/over garage door to spray with LVLP set up. Thank you in adavance.

    • Hi Stephen,

      You would need to initially establish an overall m² area that needs painting – we’d recommend a minimum of 2 coats so multiply the total area by 2 and then divide by the coverage of the product which will then tell you how many litres are needed. You’ll also need to take in to account a loss factor for overspray etc so an additional percentage of product will be required.

      Hope that helps – let us know if we can be of any further help.

  33. Hi there,

    I have 3 good uPVC windows that i am recycling from a house i have demolished and using in a garage/gym.

    I will be stripping the hardware from the windows, masking the glass and spraying.

    I have my own spraying equipment (gravity fed paint gun)

    I will be spraying RAL 7039

    Can anyone advise the most suitable paint to use with a gravity fed gun.

    Brand / Primer or 2K / Scotchbrite to key the surface etc …


    • Hi Tom,

      We would recommend Zinsser Allcoat Exterior for your application and the temperature during application and curing would determine whether we would propose the water based or solvent based options. Unfortunately with either of these products and any others we’d recommend for uPVC, they should be applied by brush, roller or airless spray equipment only, we wouldn’t have anything we could recommend for conventional spray.

  34. I am seriously considering painting my 40yr old upvc front door as it is 2 shades of white. Old grey white round the frame & badly yellowed white in the middle. The Zinsser exterior satin has given me hope that I can indeed paint it, BUT – I live right on the coast & in the teeth of vicious northerlies & easterlies in winter. The front of the house gets salt drenched & sandblasted. Will this paint withstand such harsh conditions?


    • Hi Liz,

      Zinsser Allcoat Exterior would be suitable for this application but you may find that it doesn’t last the expected 15 years as advised on the tin. We wouldn’t have anything else we could recommend that would offer a longer life expectancy in the environment you have detailed.

  35. Hi, would Zinsser exterior satin also work as a top coat for plastic composite decking?
    Mine is the type that is encased in a uPVC type finish.

    • Hi Marc,

      Thanks for your question; we would not recommend Zinsser Allcoat Exterior be used on any flooring substrates as it is not designed to receive that kind of traffic. Instead we would recommend Smartkote Safekote which will offer an anti-slip finish suitable for application on plastics.

      I trust that helps answer your query – certainly feel free to reply if we can help with anything else.

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