Fire Retardant Guide
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Fire retardant paints reduce the combustibility of timber and timber related material, making them more difficult to ignite. They also slow the rate at which flames spread and reduce flashover. The test method used to assess the effectiveness of flame or fire retardant products is BS476 Part 7 1987 and is used to classify a material in terms of “Spread of Flame”. In this way products achieve a Class 1, which is a low surface spread of flame (the highest achievable under the test method) and is a performance normally required for walls and ceilings. In high risk areas such as escape routes Class 0, limited combustibility is required. To comply with this products must have Class 1 Surface Spread of Flame and a low fire propagation index to BS476 Part 6 1989.
Where can you use fire retardant paints and impregnation liquid?
Material or surface type
Painted, stained or varnished
MDF (FR & non-FR)
Melamine faced MDF
Painted canvas on plasterboard
Interior and exterior cladding
Timber ceilings and walls
Summerhouses and Sheds
ACS S92/FR is a clear or white, waterborne fire retardant coating for protecting timber and timber related products to BS476:Part 6: 1989 and BS476: Part 7: 1987 to UK Building Regulations Class 0&1.
The product is non-hygroscopic and is suitable for both interior and exterior application, when used in association with the correct protective lacquer. Can be applied to previously painted or stained surfaces when used in conjunction with the ACS Adhesion Primer.
The product has also been tested in accordance with EN13501 Parts EN13823: 2002 (SBI) and EN11925-2: 2002: Ignitability Test on both particleboard and MDF, achieving a rating of B/S1/d0.
ACS S42 is single-pack, waterborne clear or white fire retardant and intumescent coating for application to timber and timber related products.
When used correctly the product imparts fire resistance to BS476 Part 20 for 30 and 60 minutes insulation (depending on substrate) and BS476 Parts 6 & 7. To protect timber and timber related products such as hardwoods, softwoods, cladding, boarding and certain plastics. Suitable for providing up to 60 minutes protection when used on certain timber construction.
Tested to BS EN13823: 2002 (SBI) and BS EN 11925-2: 2002 Ignitability achieving a classification of B/s1/d0 on both particleboard and MDF.
Also tested to EN 1364 – 1: 1999 on 20mm Norway spruce shiplap cladding, achieving 66-minutes resistance.
ACS S92/FR/P is a clear or white, primerless waterborne fire retardant coating for protecting interior timber and timber related products to BS476: Part 6: 1989 and BS476: Part 7: 1987 to UK Building Regulations Class 0&1.
The product is non-hygroscopic and is suitable for interior application, normally without the use of a protective lacquer. The product has also been tested in accordance with EN13501 Parts EN13823: 2002 (SBI) and EN11925-2: 2002: Ignitability Test on both particleboard and MDF, achieving a rating of B/S1/d0.
Used to protect timber and timber related materials such as softwood, hardwood, hardboard, chipboard, plywood, MDF (both fire rated and non-fire rated), bamboo and melamine faced boards.
On interior surfaces, not subjected to wear or damage, S92/FR/P can be used without a protective topcoat. The product dries to a satin finish. S92/FR/P is a reasonably robust coating, however all surfaces subject to heavy wear or damage (such as commercial wall panelling and all flooring situations) will require the use of a protective topcoat.
ACS FCO is a new generation, clear, waterborne fire retardant, surface applied impregnation liquid for protecting untreated timber and timber related substrates. Tested in accordance with EN13501 on softwoods, hardwoods, and particleboard achieving a rating of B/S1/d0 (equivalent to Class 0 & 1 to UK Building Regulations).
ACS FCO can be easily applied to a wide variety of surfaces including unpainted floors, timber framing, panelling, decking, soffit board, fencing and cladding, both interior and exterior.