Envirograf HW01/F Fire Protection Coating
  • Envirograf HW01/F Fire Protection Coating

Envirograf HW01 White Intumescent Coating

Product 42 - HW01

Envirograf HW01 is a white, intumescent coating for wood.


  • BS Class 0 & Class 1 protection
  • 30 & 60 mins’ fire resistance
  • White finish for upgrading new or previously coated wood & timber
  • Water-based for internal/external use
  • Should be used as part of a complete Envirograf system
VAT excluded

£36.82 Tax incl.


Envirograf HW01 White Intumescent Coating

Envirograf HW01 White Intumescent Coating provides BS Class 0 & Class 1 as well as 30 and 60 minute protection for wood and certain wood related products (see product data sheets and test data (available upon request) for full details).

Recommended Uses

  • Part of a complete system with selected primers and topcoats
  • As a fireproof, white coating
  • Upgrading new timber/wood
  • Upgrading certain wood related surfaces already coated

Preparation & Application

See product data sheets in the 'Attachments' section below.

DOORS - Please see Envirograf Door Upgrade Paint System.


  • When using Envirograf HW01 White Intumescent Coating stir the tin well for approximately 5 minutes. In cold weather conditions it can go slightly thick, stand the container in hot water and stir it well – it will then go to a paint consistency.
  • The properties of this product cannot be guaranteed unless storage and application instructions are adhered to, Envirograf strongly advise that you apply the product over a small area to ensure that there is no adverse reaction to the substrate to be processed.
  • Envirograf HW01 White Intumescent Coating cannot provide 30 or 60min protection on man-made timbers such as MDF, OSB, Plywood, etc. only BS Class 0 & Class 1.
  • Minimum timber thicknesses apply for 30min and 60 minute protection - consult the product data sheets, test reports and Technical Department before proceeding.
  • Seek approval from the relevant authority for this product/system including test data prior to purchase/use (test data available upon request).

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and ConditionsWe will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.

Any Envirograf products to be used in or for Harrods department store should be authorised with our Technical Team prior to purchase.

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.

Product Details
Product 42 - HW01

Data sheet

Brush, Roller, Spray
8 - 10m² per litre
Touch Dry
2 Hours

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 Rob Wilson on 2020-03-21 18:29:09

Hi, I have recently created a down stairs W/C by partitioning part of my garage, the wall on the garage side is MDF and requires fire proofing, would this product provide sufficient protection? Thanks


Thank you for your enquiry, in order for us to be able to advise, please provide us with as much of the following information as possible;

  • Size of surface area to paint
  • Timber thickness
  • Level of Fire Protection required (Class 1, Class 0, 30min, 60min, etc.)
  • Type of Timber surface (i.e. T&G, feather edge / shiplap cladding, solid panels / sheets, etc.)
  • Internal or external
  • Clear or coloured coating required?
  • Bare or previously coated?
questions steve on 2019-12-17 10:18:46

Hi, I have a hardwood frame that has never been painted before. Can I apply 2 coats of HW01 directly to the timber, and then apply 2 coats of a water based paint colour of our choice over the top. Will this give 30/60 minutes depending on the design of the frame. OR do I have to use the complete system, ie 1 x HWAP-WP, then 2 x HW01, the 1 x HW04, then 2 x Our top coat. Thanks in advance. Steve.


Envirograf advise that Envirograf HW01 White Intumescent Coating can in certain instances be applied directly to timber and that Envirograf HW01 White Intumescent Coating can also be overcoated with a topcoat of your choice, however they advise to carry out sample areas first as there is potential compatibility issues that may occur. As a distributor of the product and from our experience of projects like this we would always recommend using Envirograf HWAP/WB Primer and Envirograf HW04/S Undercoat in conjunction with Envirograf HW01 White Intumescent Coating where possible.

questions Nigel on 2019-10-02 14:35:56

Could you tell me if the Envirograf HW01 White Intumescent Coating can be over painted with ordinary paint please


Envirograf have confirmed their HW01 White Intumescent Coating can be overcoated with a standard topcoat but they advise to carry out a small test area first to ensure compatibility between coats.

questions Chris Partridge on 2019-05-29 14:04:45

We are finishing a kitchen extension and have decided to line walls and ceilings with 12mm marine ply. Local building control have advised that ply must be treated with intumescent paint to achieve Class 0. The finish we are hoping to achieve is a 'whitewash' effect whereby the grain of the ply is still detectable through the treatment/finish. Could you offer any advice on the minimum coverage rate/number of coats with this product we would need to apply to achieve Class 0 on new plywood? Would we need to prime the ply before using this product and does it need a topcoat afterwards, thanks for all help


To acheive this white wash effect on plywood whilst upgrading to BS Class 0 Surface Spread of Flame we would recommend Thermoguard Thermoproof Interior Fluid followed by Thermoguard Thermoproof Interior Sealer in 'White Low'.

questions Ian Blackwell on 2019-01-21 14:42:03

Hi I have a basement kitchen in an HMO property. The ceiling is a mix of plasterboard and exposed wooden beams (the plasterboard inserted between beams). There is a requirement for 30 minute protection, and the beams were therefore treated with intumescant varnish some years ago. I now intend to paint entire ceiling (both plasterboard & beams) white, and want to make sure I use the correct intumescant paint to give the 30 minute protection. Any advice much appreciated, thank you.


To upgrade the plasterboard areas we would recommend you use Envirograf's EP/CP coating.

Specification is as follows:

Once this has been applied you can go over both the previously upgraded timber and the plasterboard with a finishing coat of Envirograf HW Acrylic Top Coat applied at 10m² per litre to provide the white finish you desire. This will provide the 30 minute rating required assuming the timber previously upgraded has been carried out correctly and is still intact/valid.

questions ashley winzer on 2019-01-17 16:06:30

Hi I am looking to upgrade doors in my holiday let to 30 minutes fire rated doors. Is there a minimum thickness for this to work as there is paneling in the middle of the doors which is alot thinner than the general frame of the door? Also i am looking at using Product Number: 42 HW01 to make them 30 minute fire rated doors along with suitable door seals will this do the job or do i also need another product. many thanks Ashley


We would recommend Envirograf Door Upgrade Paint System and viewing Door Upgrading Technical Data from the Download section on this product page which should answer all your questions.

questions Tania De la Porte on 2019-01-07 23:04:32

Hi please can you tell me if this paint can be used on varnished wood stairs?


If coating over existing paint or varnish apply Envirograf HWAP/WB Primer first. Please note that this coating system cannot be used on any areas of the stairs that are trafficked, i.e. stair treads, hand rails, etc.

questions Martin carter on 2018-11-28 09:52:49

We have a specification requiring a ceiling to be painted with intumescent paint to be 1 hour fire protection for the room above what would you recomend


If the ceiling in question is timber, we would require the following details to enable us to provide you with a specification and quotation;

  • Size of surface area to protect
  • Type of timber (i.e. pine, mdf, plywood, etc.)
  • Type of Timber surface (i.e. T&G, feather edge / shiplap cladding, solid panels / sheets, etc.)
  • Timber thickness
  • Clear or coloured coating required?
  • Bare or previously coated?

If the ceiling is plasterboard/lath & plaster then please instead provide the following;

  • Size of surface area to protect
  • Thickness of plasterboard/lath & plaster if known
  • Final colour required?
  • Bare or previously coated?
questions Paul houlichan on 2018-10-14 12:01:24

Hi I'm looking at updating my doors to 20 minute firedoors to comply with building regs for a loft conversion, Will the doors need to be stripped back to bare wood?,they are white gloss at the moment


Envirograf Door Upgrade Paint System Packs allow users to upgrade solid wood/timber doors to up to 30 mins' fire resistance. Existing paints do not need to be removed assuming they are not a previous fire protection coating and are sound and well adhered.

questions Elisabeth Moyes  on 2018-09-09 09:58:48

Can you paint a colour over the fireproof paint?


Envirograf state that once Envirograf HW01 White Intumescent Coating has been applied you can go over with a topcoat of your choice. They do however recommend you carry out a small test area first to ensure adhesion and compatibility.


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