Sikasil® WS-305 KR

High performance weatherproofing sealant

Sikasil® WS-305 KR is a durable, neutral-curing silicone sealant with a high movement capability and excellent adhesion to a wide range of substrates.  

  • Outstanding UV and weathering resistance
  • Adheres well to glass, metals, coated / painted metals, plastics and wood
  • ASTM C 920  for Type S, Grade NS, Class 50