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Envirograf HW Intumescent Coatings for 30/60 Minutes Fire Protection

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Envirograf Intumescent Paint for Interior and Exterior Wood

Achieves 30 or 60 minutes fire protection

For timber and timber composite panels

Upgrades doors to fire door rating (subject to door construction)

Expands in heat to create a char barrier

Complies with UK and European Building Regulations

Supplied in clear, white or tinted to your colour

Envirograf Product 42

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Product Info

Envirograf HW Intumescent Paint for 30/60 Minutes Fire Protection

Fire protection doesn't have to compromise your building's appearance

Envirograf Intumescent Waterborne Paints dry to a smooth, durable finish. They are available in ready-mixed white, clear or can be tinted to any colour from any trade professional or DIY colour card.

HW Intumescent products are designed to offer 30/60 minutes fire penetration protection and Class 1 & 0 Spread of Flame protection. When exposed to fire, the intumescent paint swells and chars preventing the fire from penetrating the timber structure. Length of protection is dependent on the type and thickness of the timber, for an exact specification call the HSP Fire Protection team on 01793 525241.

HW Intumescent Paint is easy to apply by brush, roller or spray. To achieve Class 1 & Class 0 Spread of Flame Protection, apply 1 coat at 10m2 per litre. For 30/60 minutes Fire Penetration Protection, apply 2 coats at 8m2 per litre leaving 45 minutes drying time between each coat.

Envirograf Intumescent Paint can be used on new and previously coated, interior and exterior wood. When painting previously coated wood, HW Primer must be applied first.

To guarantee fire protection, HW products must be over-coated using either an Interior or Exterior Protective Topcoat.

Envirograf HW Primer. A Water-based intumescent primer for interior and exterior woodwork

A water-based intumescent primer which provides the perfect surface for Envirograf HW Intumescent Paint. HW Primer offers good adhesion, high opacity and excellent grain filling properties. The primer is designed to go on previously coated wood to aid the adhesion of Intumescent paint.

Envirograf Intumescent Coatings can be used to upgrade many types of solid door to 30 or 60 minute fire door rating. (See Ideas and Advice Section for more detail)

Envirograf HW Intumescent Paint must be over-coated with a protective topcoat to increase its lifetime and guarantee protection.


Tested on wooden doors, achieving 60 minutes integrity and 30 or 60-minute fire protection and insulation according to BS476 Part22.

Up to 60 minutes fire protection achieved on open joists and floorboards according to BS476 Part 20.

90-minute fire rating achieved on timber mouldings and carcasses according to BS476 Part 20.

Tested on a range of timber types, including plywood and MDF, complying with BS476 Parts 6 & 7, Classes 0 & 1 (Spread of Flame).

Tested to European Standard EN1364-1, achieving 66 minutes integrity.

Complies with Classification B/S1/d0 of European Standard EN13823, single burn test (SBI) and EN11925-2 (ignitability).

Class A Flame Spread Classification to UL723 Standard  with Flame Spread 25 and Smoke development 300.

Canada Approval 

BMQX7.R27872 – Coatings, Fire Retardant Certified for Canada

USA Approval

BMQX.R27872 – Coatings, Fire Retardant for USA

Technical Data
Coverage 8m2 per Litre
Application Brush, Roller or Spray
Waterbased Yes
03.Drying Time (Recoat) 2 hours
Type Intumescent Paint
Thinning max 10% water if spraying
Fire Performance

All types of new and old doors (some over 200 years old) have been tested in accordance with BS476 Part 22 (1987), and their fire resistance was upgraded to an integrity of over 50 minutes.

The HW range can also upgrade wood panelling to 30 minutes or 60 minutes fire rating, according to the type of wood and its thickness.

Open joists and floorboards have achieved 60 minutes of fire protection on a loaded floor to BS476 Part 20 (1987).

Timber mouldings and carcases have achieved 90 minutes of fire rating to BS476 Part 20 (1987). A range of timber types, including MDF, plywood, etc, have been tested and complied with BS476 Parts 6 and 7 (1987) Classes 0 and 1. Also tested to EN1364-1 (1999) for 66 minutes.

This coating system complies with the Classification B/S1/d0 of European Standard EN13501 Parts EN13823 (2002) single burn test (SBI) and EN11925-2 (2002) ignitability.

Timber doors tested to BS476 Part 22 (1987) giving 30 & 60 minutes fire protection and insulation.

Tested and approved in Canada and USA to strict UL Classification ANSI/UL723 Tenth Edition (ASTM E84-13A)


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