Sikasil® WS-305 AM

Weatherproofing Sealant

Sikasil® WS-305 AM is a neutral curing silicone sealant with high movement capability and excellent adhesion to a wide range of substrates. It is particularly suited as a weather seal for curtain walls and windows.  

  • Fulfills ASTM C920 Type S, Grade NS, Class 50, Use M,G,A
  • Outstanding UV and weathering resistance
  • Adheres well to many substrates including concrete, glass, metals, coated and painted metals, plastics and wood.