Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Wacker POWERSIL 577 PLUS One-Component Silicone Sealant

Wacker POWERSIL 577 PLUS is a one-component, acetoxy-cure silicone sealant offering rapid tack-free time, excellent adhesion to glass/metal/plastics, high elasticity, UV resistance and weatherproof performance—ideal for façade, curtain wall and automotive assembly applications.
  • wacker powersil 577 plus one component silicone sealant_ee0af097
  • wacker powersil 577 plus one component silicone sealant_ee0af097

Features Of Wacker POWERSIL 577 PLUS One-Component Silicone Sealant

  1. Acetoxy-cure chemistry enabling rapid surface cure and excellent adhesion to glass, aluminum, and common construction substrates.

  2. Excellent resistance to weathering, UV radiation, and temperature extremes (–40 °C to +150 °C continuous service).

  3. Low modulus formulation provides high elasticity and superior joint movement capability (±25 % movement accommodation).

  4. Non-sag consistency ensures reliable vertical and overhead application without slumping.

  5. Free of isocyanates, solvents, and phthalates — compliant with VOC regulations and suitable for indoor applications.

Typical Applications Of Wacker POWERSIL 577 PLUS One-Component Silicone Sealant

  1. Structural and non-structural glazing in commercial façades and curtain wall systems.

  2. Sealing of expansion joints in precast concrete and metal cladding assemblies.

  3. Perimeter sealing of windows, doors, and skylights in architectural building envelopes.

  4. Weatherproofing of balconies, terraces, and roof-to-wall transitions.

  5. Joint sealing in cleanroom and controlled-environment facilities requiring low-emission materials.

Specifications Of Wacker POWERSIL 577 PLUS One-Component Silicone Sealant

Chemical TypeAcetoxy-curing RTV silicone
Product FormThixotropic paste in sausage cartridges (300 mL) and bulk packaging (600 mL)
AppearanceOpaque, uniform paste; available in clear, white, and neutral gray
Primary ApplicationsArchitectural glazing, façade sealing, and dynamic joint protection
Shore A Hardness (7 days, 23 °C/50 % RH)25–30
Tensile Strength (ISO 8339)≥1.8 MPa
Elongation at Break (ISO 8339)≥350 %
Cure Depth (24 h, 23 °C/50 % RH)≥3 mm


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