Sikasil® WS-355 N

high performance natural stone sealant

Sikasil® WS-355 N is a neutral curing silicone sealant with a high movement capability and very good adhesion to porous and non-porous substrates.
It has been developed as weatherseal specific on natural stone.  

  • Does not stain areas adjacent to the joint
  • Meets requirements of ASTM C 920 for Type S, Grade NS, Class 50 (movement capability ± 50 %), ASTM C 1248
  • Very good UV and weathering resistance
  • Adheres well to natural stone, concrete, glass, metals, coated and painted metals, plastics and wood