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Flexseal FR

A Fire Resistant Silicone Sealant formulated to provide a high degree of fire resistance in a variety of joint configurations.

  • Flexible
  • Up to 4 Hour fire rating 
  • Waterproof
  • Excellent un-primed adhesion to most building components
  • Meets ISO 11600 standard with the classification – ISO11600-F&G-25LM
  • Tested to BS EN 1366 part 4 at Warrington. Copy of report available on request.
  • Colour - Grey
  • Available in 310ml Cartridge
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Fortafix Flexseal FR Silicone Sealant is a one-part silicone sealant formulated to provide a high degree of fire resistance in a variety of joint configurations. It has been independently tested and achieves in certain joint configurations an integrity and insulation value in excess of 4 hours. Flexseal FR is suitable for sealing a wide range of construction and expansion joints in buildings, where compartmentalisation within the building is required to control spread of fire.It cross links at room temperature to give a flexible low modulus seal which will withstand movement of 25% in constant service throughout a wide temperature range.Suitable for Glass, Anodised and Mill Finished Aluminium, Steel, St.Steel, rigid PVC, Concrete and other porous surfaces. Once cured, the sealant offers superb long-term resistance to heat and fire as well as all other general weather elements.
Typical applications include; Expansion and construction joints in walls and cladding panels, sealing of service penetrations, roofing and conservatory applications, capping sealant for bead glazing, and general sealing work.
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  • Made in the UK for 120 years