Product Description

Zinsser Watertite is a solvent-based, mould and mildew-proof, internal and external waterproofing paint that is guaranteed to keep water out by sealing masonry, and to give a fantastic finish in commercial spaces and workplaces. In-part, Watertite is designed for dank and damp cellars/basements, containing a biocide that protects the dried coating against fungal degradation for a minimum of 5 years. For ease of use and versatility, it can easily be applied to wet or dry surfaces in a range of light, pastel shades, to create a smooth, non-gritty finish.

Watertite has a unique solvent-based formula that combines a state-of-the-art waterproofing resin with Portland cement to create a coating that stops up to 34psi of water pressure. It is ideal for rooms and surfaces where mould, damp and fungal degradation have been a problem; wine cellars; storage rooms in compartmentalised basement spaces; areas with minimal or poor ventilation.

Unlike other waterproof coatings, Zinsser Watertite waterproofing paint can be applied directly to dry, damp or wet surfaces, allowing for water problems to be cured immediately with minimal preparation or surface drying-out requirements. It can also be recoated in just four hours, drying to a smooth, bright white, and non-yellowing finish that resists dirt and dust pick-up.

Project and facility managers will benefit from using Zinsser Watertite in college, schools and educational facilities, where there are many storage rooms without ventilation, poor air circulation, and long-term requirements of storing paperwork, stationary and equipment on permanent shelving and units.

Watertite can be tinted to most off-white or pastel colours, and has an ultra-low odour formula – lower than most standard emulsions. It adheres to any interior or exterior masonry surface, above and below grade, and is formulated to prevent recurring efflorescence on concrete and brickwork.

Touch-dry in one hour and recoatable after 4 hours, surfaces must be free of any active leaks prior to the first coating. It is advised to apply Watertite to textured surfaces, and smooth surfaces may need to be abraded or blasted first, to create a surface profile. For more information about applying Zinsser Watertite, please refer to the manufacturer’s product datasheets, or alternately contact Rawlins Paints’ technical support team.

Features & Benefits

• Guaranteed to stop up to 34psi of water pressure
• Prevents fungal degradation on the paint film for 5 years – guaranteed!
• Smooth, non-gritty finish applies easily to wet or dry walls.
• Ideal for basements and other interior / exterior surfaces.
• Ultra-low odour solvent-based formula.

Please note: Errors and omissions excepted (E&OE). It is your responsibility to read all data sheets (available upon request) prior to application. The specification given above is our best recommendation from the information supplied and is given in good faith but without warranty. We recommend a trial area is coated to ensure the product meets your requirements.

It is your responsibility to read the Product Data Sheets (available below) before you place an order and prior to application of the product. The content of this website is our best recommendation and is not advice. Coverage rates quoted are approximate, you agree that coverage depends on the condition of the substrate, surface absorption, texture and application method. We ALWAYS recommend a trial area is coated to ensure the product meets your requirements before use.

Technical Data

Typical Coverage (per coat)2m² per litre
Touch Dry1 Hour
ApplicationBrush, Roller
The figures stated above are approximate. Please ensure you refer to all datasheets for full application information.


Customer agrees that before placing an Order, Customer has read and understood the most up to date Product Data Sheet for the Product. Where we have access to the Product Data Sheet from the manufacturer, we will either provide a copy on request, or include a link to the Product Data Sheet available on the manufacturer’s website. Customer further agrees that we have no liability for any errors or omissions contained within the Product Data Sheets. For more information, please see our Terms & Conditions of Sale.


questions John Butler on 15/03/2018

I have rust bleeding through the masonry coating on my house. The rust comes from the metal edging used by builders so I cannot simply get rid of the source of the problem. Can you recommend a product that will 'seal the surface' thus preventing further bleed. This product will need to be suitable for painting over in order to match the rest of the masonry. I have tried a number of sealants without success.


Zinsser Cover Stain has been used in this situation to block the rust stains however there is no guarantee how long it will hold the stains back. As soon as any trace of moisture gets into the metal beading the rusting process will start again and stains are likely to bleed through once more. It would not be possible to say how long the primer would hold the staining back.

Applying 2 coats of the Cover Stain will give a little more protection and hold back the staining for longer than 1 coat. The Cover Stain can be overcoated with a standard masonry type coating. Please note that the only 100% effective way to solve the problem would be to remove the affected angle beading and replace with new stainless steel or plastic beading.

questions Graham Peck on 21/11/2017
Question: A below ground level (1m) internal wall in an old converted barn has been previously tanked, but now is damp. Plaster sound and render sounds solid. Will Watertite be a cost effective solution after stripping back plaster compared to very expensive re-tanking?
Thanks for your help

Zinsser Watertite is a cheaper option than tanking and should work in this situation. It needs a sound masonry surface to bond to, all the plaster must be removed back to the masonry substrate. Apply the Watertite directly to the render surface, no primers or stabilisers should be applied. Be sure to read the products Technical Data Sheet carefully and advise if you have any other questions.

questions Aziz on 13/10/2017
Question: Hi,

Can the zinsser-watertite paint be applied on internal skimmed walls. I have a house that is insulated and water has saurated the insulation and so in the kitchen water penetrates the wall and so paint flakes off.

I note from the product description that it can only be applied on brick walls?


Zinsser Watertite works best when applied to bare masonry surfaces, for your application you may be better looking at Rust-Oleum Mathys Durbocem or Coo-Var Anti-Damp Paint. The source of your water ingress should be remedied ASAP.

questions Tracey  on 03/09/2017
Question: Is this the best paint to use in our cellar. Bricks are quite wet and in a couple of areas water is coming in through old mortar joints

Zinsser Watertite should be OK for this job, this is the type of situation the product is used for. It can be applied to damp surfaces however these must be clean, sound and any previous paint coatings well adhered. Any gaps in the mortar joints where the water is leaking through will need to be patched up with render. Refer to the Technical Data Sheet and follow all the steps regarding preparation and application.

questions Liz Spencer on 15/05/2017
Question: Can this paint be used over existing emulsion? I want to use it in the cellar, the plastered walls have already been painted. but damp is coming through in places. Provided any loose paint is scraped off, would this paint work?

No, Zinsser Watertite should not be applied over existing coatings. Instead see Coo-Var Anti-Damp Paint.

questions Ali Reed on 23/04/2017
Question: Can I use this product to paint over the tiles in my shower ??

No, you would need to use instead something like Rust-Oleum Tub & Tile Refinishing Kit.

questions r collier on 15/02/2017
Question: how many coats does zinzeer watertight require on bare block-work walls please

2 - 3 coats at 2m² per litre, per coat.

questions G Overbury on 15/06/2016
Question: Would it be ok in a bathroom to paint Watertight over water resistant plasterboard, and ceiling, then tile over part of the board?

Is the paint likely to affect tile adhesion?

This is a fairly common question and the answer is Zinsser Watertite is definitely not recommended for this situation. You should ask the supplier of the plasterboard if any special treatment is required before tiling over, but we would expect you can tile straight over the board.

questions Ian on 02/04/2016

How many litres in a tin?


This product is available in 5 litre or 10 litre tins.

questions angela moth on 27/10/2015

Can Zinsser Watertite be used indoors for damp proofing?


Zinsser Watertite has a unique solvent based formula that combines a state-of-the-art waterproofing resin with Portland cement to create a coating that stops up to 34psi of water pressure. It can be used internally and externally on walls.

questions Orpheus consultants on 26/05/2015

Can we overpaint Zinsser Watertite?


Zinsser Watertite can be mixed to most pastel shades and produces a smooth, eggshell finish. But, if desired, it may be over coated with most good quality paints, but this will nullify the mould and mildew protection portion of the Zinsser warranty. To maintain the warranty, use Zinsser Perma-White Interior or Zinsser Perma-White Exterior which can be mixed to almost any colour required in a variety of sheen levels. Whichever method is chosen, allow a minimum of 14 days before over-painting.


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