CAF FR 55 GREY may be stored at temperatures between 2°C / 36°F and 30°C / 86°F for up to 18 months from its date of manufacturing.Please consult the Safety Data Sheet of this product.


CAF FR 55 is a one component, ready to use silicone elastomer intended to produce fire-stop sealing and bonding seals.

Adhesion;Fire Protection;Sealant;Sealing

1 Part RTV Oxime

CAF FR 55 withstands fire for 4 hours when used in seals with a width of up to (curtain wall or floor). It remains neutral to construction materials, including porous surfaces. It is an elastomer with an average modulus of elasticity which therefore subjects bonding surfaces to low stresses and gives longer life to sealing joints.
Processing and smoothing of seals is made easier due to the sealant's outstanding rheological characteristics.
CAF FR 55 can be used on clear glass, metals, wood, PVC, cellular concrete, granite, etc.
CAF FR cured, withstands diluted bases and salt mist, together with the temporary action of common solvents and hydrocarbons with, for the latter, slight swelling of the sealant during exposure.
As opposed to this, its characteristics can be modified by acids or chemical oxidising agents. Its mechanical and adhesion properties are not affected by the sun's rays, snow, rain, ozone and allow it to provide its functions over many years.

CAF FR 55 is especially suited to producing fire stop seals and sealing and bonding in construction and glazing applications, notably for:

  • Heavy prefabrication and traditional masonry.
  • Curtain walls, panels and facades, metal and PVC joinery.
  • Air ducts, cable or piping passages.
  • Terrace or fireplace seals.
  • Elastic seal in glazing, on aluminium, wood, PVC, etc.


Asia Pacific;Europe Middle East Africa;Central and South America;North America




Hardness20MonocompISO 868sh.A
Elongation600MonocompNF ISO 37%
Tensile strength1.1MonocompNF ISO 37MPa/s