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

Wacker ELASTOSIL N291 One-Component Silicone Sealant

Wacker ELASTOSIL N291 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 automotive, electronics and architectural sealing applications.
  • wacker elastosil n291 one component silicone sealant_570e5052
  • wacker elastosil n291 one component silicone sealant_570e5052

Features Of Wacker ELASTOSIL N291 One-Component Silicone Sealant

  1. Room-temperature vulcanizing (RTV) silicone sealant with neutral cure mechanism — no corrosive by-products released during curing.

  2. Excellent adhesion to common substrates including glass, aluminum, stainless steel, ceramics, and many plastics without primer.

  3. Outstanding resistance to weathering, UV radiation, ozone, and extreme temperatures (–50 °C to +180 °C continuous).

  4. Good electrical insulation properties and low compression set for long-term sealing integrity.

  5. Non-yellowing formulation suitable for visible applications requiring aesthetic stability over time.

Typical Applications Of Wacker ELASTOSIL N291 One-Component Silicone Sealant

  1. Sealing and bonding in architectural glazing systems, including structural and perimeter joints.

  2. Electrical enclosures and LED lighting housings requiring environmental protection and dielectric performance.

  3. Automotive sensor housings and electronic control units exposed to thermal cycling and humidity.

  4. Industrial equipment assembly where resistance to aging and chemical exposure is critical.

  5. Medical device enclosures and analytical instruments demanding biocompatibility-supportive material compatibility.

Specifications Of Wacker ELASTOSIL N291 One-Component Silicone Sealant

Chemical TypeNeutral-cure, condensation-type RTV silicone
Product FormPaste-like, thixotropic one-component sealant
AppearanceOpaque white or translucent gel (color may vary by batch)
Primary ApplicationsGeneral-purpose sealing, bonding, and potting in industrial and electronics sectors
Key FeaturesPrimerless adhesion, non-corrosive cure, UV stable, low volatility
Shore A Hardness (7 days, 23 °C/50% RH)28–32
Tensile Strength (7 days, 23 °C/50% RH)≥1.8 MPa
Curing Depth (24 h, 23 °C/50% RH)≈3 mm


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