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

Wacker ELASTOSIL A33 One-Component Silicone Sealant

Wacker ELASTOSIL A33 is a one-component, addition-cure silicone sealant offering excellent adhesion, low shrinkage, and outstanding thermal stability. It cures at room temperature with moisture resistance, ideal for automotive, electronics, and industrial bonding/sealing applications requiring high reliability and long-term performance.
  • wacker elastosil a33 one component silicone sealant_ccad59f1
  • wacker elastosil a33 one component silicone sealant_ccad59f1

Features Of Wacker ELASTOSIL A33 One-Component Silicone Sealant

  1. Room-temperature vulcanizing (RTV) silicone sealant with moisture-cure mechanism.

  2. Excellent adhesion to common substrates including glass, aluminum, ceramics, and painted metals without primer.

  3. Good resistance to weathering, UV radiation, and temperature extremes (–40 °C to +150 °C continuous).

  4. Low modulus elasticity for high movement accommodation (±25 % joint movement capability).

  5. Non-corrosive, acetoxy-cure chemistry with neutral odor during curing.

Typical Applications Of Wacker ELASTOSIL A33 One-Component Silicone Sealant

  1. Structural glazing and façade sealing in architectural curtain walls.

  2. Sealing of insulating glass units (IGUs) in commercial and residential windows.

  3. Joint sealing in precast concrete and metal cladding systems.

  4. Weatherproofing of expansion joints in building envelopes.

  5. Industrial bonding and sealing of lighting fixtures and electronic housings.

Specifications Of Wacker ELASTOSIL A33 One-Component Silicone Sealant

Chemical TypeAcetoxy-cure, one-component RTV silicone
Product FormPaste, thixotropic, ready-to-use
AppearanceOpaque white or translucent gel-like paste
Primary ApplicationsArchitectural glazing, façade joints, IGU secondary sealant
Key FeaturesPrimerless adhesion, low modulus, UV stable, non-corrosive
Shore A Hardness (7 days, 23 °C/50 % RH)22–28
Tensile Strength (7 days)≈0.5 MPa
Specific Gravity (23 °C)1.35–1.45 g/cm³


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