Fosroc Flamex Two - Flexible intumescent sealant - Mid Grey color (2.50 Litre Tin)
Flexible intumescent sealant
For fire protection in expansion and construction joints in walls, floors and ceilings, confining smoke and fire, giving extra time for people to escape from a fire situation.
- Extensively fire tested in accordance with BS 476 Pt:20:1987.
- Fire tested in overhead joints as well as in wall joints
- Over 4 and 5 hours insulation and longer integrity rating, depending on joint design
- Suitable for fire stopping of joints as defined by Approved Document B of the Building Regulations
- Prevents the passage of smoke through joints under fire conditions
- Effective as normal building sealants and allows structural movement
- Resistant to a range of chemicals
Tested in accordance with BS 476 Pt. 20: 1987.
Under fire conditions Flamex Two intumesces, forming a foam-like structure which insulates and provides a barrier to hot gas and flame. Flamex Two high performance sealant forms a tough, flexible rubber-like seal with a movement accommodation factor of 25% for high movement situations. Flamex Two is suitable for expansion joints in building superstructures and may be used in both internal and external joints. Flamex Two can be used in joints from 5 mm up to 50 mm wide, with a minimum depth of 12mm in all circumstances.For non-trafficked movement joints the width of sealant should be twice the depth, subject to a minimum depth of 12 mm. For trafficked movement joints, sealant depth should be equal to the width subject to a minimum depth of 12mm. The use of a surface primer is always required.
Fire performance test data:
Extensive fire testing has been carried out on Flamex Two in accordance with BS 476 Pt.20: 1987 at the Technical Centre of the Loss Prevention Council (LPC).
Sealant was assessed in terms of insulation and integrity.
Insulation is defined as the ability to restrict excessive heat transfer through the joint, preventing ignition from conduction on the cold side.
Integrity is the ability to remain intact during the test, thereby withstanding the pressures and stresses developed during a fire situation.
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