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Sikasil® WS-305 EU

High-performance silicone weatherproofing sealant, CE-marked

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

  • Meets requirements of ISO 11600 F 25 LM & G 25 LM, EN 15651-1 F EXT-INT CC 25LM, EN 15651-2 G CC 25LM, ASTM C920 for Type S, Grade NS, Class 50 (movement capability
    ± 50 %)
  • Provided with CE-mark according to EN 15651-1:2012, F EXT-INT CC 25LM, EN 15651-2:2012, G CC 25LM, certified by Control Body 1119
  • Outstanding UV and weathering resistance
  • Adheres well to glass, metals, coated / painted metals, plastics and wood
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