Sikasil WS-305 EU Neutral-curing Silicone Weatherproofing Sealant, Black, 20oz

Sikasil WS-305 EU Neutral-curing Silicone Weatherproofing Sealant, Black, 20oz

Sikasil® WS-305 EU 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. Sikasil® WS-305 EU is typically used for weather sealing curtain walls and glass butt joints or as a perimeter weather seal for windows, doors, and window walls.

Uses:

• Sikasil® WS-305 EU can be used for weatherproofing and sealing applications where durability under severe conditions is required.  Additionally, the product properties of Sikasil® WS-305 EU are beneficial for field and shop applications related to rainscreen facades, prefabricated exterior wall systems, and modular construction. This product is suitable for experienced professional users only. Testing with actual substrates and conditions should be performed to ensure adhesion and material compatibility.

Characteristics and Advantages:

• Meets the requirements of ASTM C920 Type S, Grade NS, Class 50, Use NT, M,G,A
• Meets the requirements of ASTM C1184, Type S, Use G,A
• Meets the requirements of AAMA 803.3 and 808.3
• ASTM E84 with a Flame Spread Index of 15 (Class A acc. to IBC)
• Los Angeles Research Report (LARR) approved
• Good UV and weathering resistance
• Adheres well to many substrates including concrete, glass, metals, coated and painted metals, vinyl, and wood.