Envirograf HW01 Intumescent Coating offers a white coating designed to upgrade new and existing timber substrates, offering up to 30 or 60 minutes fire protection meeting both UK National and European Fire Regulations.

HW01 is a water based product for internal and external use. When using HW01 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.

Recommended UsesPart of a complete system with selected primers and topcoats

• As a fireproof, white coating
• Upgrading timber/wood
• Upgrading certain wood related surfaces already coated

Application

The application to the door is as follows; in most cases it is the room side only of the door that needs treating. For both sides of the door it is a door that separates a corridor or is at the top of a staircase.

Note: It is important to ensure the moisture content of the wood substrate is below 12% / 14% before application and the wood should be kept in a thoroughly dry area.

• For applications over pre-painted areas – ensure the surface is thoroughly clean and free of grease or dust and that the surface has received a light sanding.
• Apply one coat of Envirograf® HWAP/WB clear Adhesion Primer at 10-12m² per litre, wait until the primer is thoroughly dry.
• For Class 0 & Class 1 BS476 Parts 6&7 and EN B/S1/d0: apply 1 coat of HW01 at 10m² per litre (100 micron wet film thickness & 60 micron dry film thickness) For 30/60 minutes Fire Protection BS476: Part 22, 1987, EN/13501 & SBI S.b1.d0:according to the type/thickness/density of timber apply two coats at 8m² per litre per coat. Each coat dries in 45 minutes. (125 micron wet film thickness & 75 micron dry film thickness per coat)
• Ensure that each coat is completely dry before applying the next subsequent coat. Please note the product can be applied by brush, roller or spray processes. Up to 10% water may be added to adjust viscosity for spraying. The contents must be thoroughly mixed before use. Use a 2.5mm to 3mm nozzle
• HW01 MUST BE OVER COATED WITH A PROTECTIVE COAT.