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

Wacker ELASTOSIL E91 One-Component Silicone Sealant

Wacker ELASTOSIL E91 is a one-component, addition-curing silicone sealant offering excellent adhesion to glass, metals, and plastics without primers. It cures rapidly at room temperature with low shrinkage, high elasticity, and outstanding UV/heat resistance—ideal for architectural glazing, solar panel assembly, and precision electronics sealing.
  • wacker elastosil e91 one component silicone sealant_b076ad4f
  • wacker elastosil e91 one component silicone sealant_b076ad4f

Features Of Wacker ELASTOSIL E91 One-Component Silicone Sealant

  1. Room-temperature curing via moisture-induced crosslinking — no mixing or catalysts required.

  2. Excellent adhesion to common substrates including glass, aluminum, stainless steel, and painted surfaces without primer.

  3. Outstanding resistance to UV radiation, ozone, and extreme temperature fluctuations (–60 °C to +180 °C long-term).

  4. Low modulus elasticity ensures high movement capability (±25 % joint movement) and stress relief in dynamic joints.

  5. Non-corrosive, acetoxy-cure chemistry with neutral odor during cure — safe for sensitive environments.

Typical Applications Of Wacker ELASTOSIL E91 One-Component Silicone Sealant

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

  2. Sealing of expansion joints in precast concrete and architectural cladding.

  3. Bonding and sealing of solar panel frames and photovoltaic mounting systems.

  4. Weatherproofing of HVAC units, skylights, and rooftop equipment enclosures.

  5. Industrial assembly sealing where thermal cycling and environmental durability are critical.

Specifications Of Wacker ELASTOSIL E91 One-Component Silicone Sealant

Chemical TypeAcetoxy-curing silicone elastomer
Product FormPaste-like, thixotropic one-component sealant
AppearanceOpaque white or translucent beige, homogeneous paste
Primary ApplicationsArchitectural glazing, façade sealing, industrial bonding
Key FeaturesMoisture-curing, primerless adhesion, high elasticity, UV stable
Shore A Hardness (7 days, 23 °C/50 % RH)22–26
Tensile Strength (7 days)≥1.8 MPa
Joint Movement Capability±25 % (Class 25 specified per ISO 11600)


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