Sikasil® FS-665 SL

Self-levelling fire-rated sealant

Sikasil® FS-665 SL is a fire-rated, self-levelling, low-modulus, silicone sealant with good adhesion to a wide range of porous and nonporous substrates. It is mainly used for floor joints and where fire rated sealing products are required.  

  • Optimized flow behavior for filling complex facade profile geometries
  • Sealant for movement joints in floors for interior applications according to EN 15651-4, PW INT 25LM, DoP 26723758, certified by Control Body 1119, and provided with the CE-mark
  • Good UV and weathering resistance
  • Meet fire retardant requirements of EN Meet classification of reaction to fire DIN EN 13501-1: Class B-s1, d0 
    Report-No. 23-001695-PR03, ift Rosenheim, Germany, September 2023
    13501-1 Class E under free suspension