About Envirograf HW Intumescent Clear Coating for 30/60 Minutes Fire Protection
Fire protection doesn't have to compromise your building's appearance.
Envirograf Intumescent Waterborne Clear Lacquer dries to a smooth, durable finish.
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.
The duration 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 Clear Lacquer is easy to apply by brush, roller or spray.
To achieve Class 1 & Class 0 Spread of Flame Protection, apply 1 coat at 8m2 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 Lacquer can be used on new and previously coated, interior and exterior wood.
When painting previously coated wood, HW Clear Adhesion Primer must be applied first.
To guarantee fire protection, HW products must be over-coated using either an Interior or Exterior Protective Topcoat.
Fire Testing and Performance
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
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