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

Wacker ELASTOSIL N189 One-Component Silicone Sealant

Wacker ELASTOSIL N189 is a one-component, platinum-cured silicone sealant offering excellent adhesion to glass, metals and plastics without primers. It cures rapidly at room temperature with low shrinkage, outstanding elasticity, UV resistance and long-term stability—ideal for precision sealing in electronics, optics and medical device assembly.
  • wacker elastosil n189 one component silicone sealant_0d40900b
  • wacker elastosil n189 one component silicone sealant_0d40900b

Features Of Wacker ELASTOSIL N189 One-Component Silicone Sealant

  1. Neutral-cure, acetoxy-free formulation ensures excellent adhesion to sensitive substrates without corrosion or acid emission.

  2. Excellent long-term elasticity and permanent flexibility over a wide temperature range (–50 °C to +180 °C).

  3. Outstanding resistance to weathering, UV radiation, ozone, and aging—maintains performance for over 20 years in outdoor applications.

  4. Low modulus design minimizes stress on bonded joints, ideal for thermally expansive materials like glass, aluminum, and composites.

  5. Ready-to-use one-component system with moisture-cured crosslinking—no mixing required and easy application via standard cartridge gun.

Typical Applications Of Wacker ELASTOSIL N189 One-Component Silicone Sealant

  1. Structural and peripheral bonding of insulating glass units (IGUs) in façade and curtain wall systems.

  2. Sealing and bonding of architectural aluminum profiles, stainless steel, and anodized surfaces in high-end building envelopes.

  3. Joint sealing in cleanroom construction and pharmaceutical facility cladding where VOC emissions and outgassing must be minimized.

  4. Bonding of solar panel frames and photovoltaic module encapsulation requiring long-term thermal and UV stability.

  5. Sealing of precision instrumentation housings and electronic enclosures exposed to harsh environmental conditions.

Specifications Of Wacker ELASTOSIL N189 One-Component Silicone Sealant

Chemical TypeNeutral-cure, addition-cure silicone elastomer (oxime-based)
Product FormPaste-like, thixotropic sealant in aluminum cartridges (310 mL standard)
AppearanceOpaque white to off-white, homogeneous paste
Primary ApplicationsHigh-performance structural glazing, façade sealing, and critical industrial bonding
Key FeaturesNon-corrosive, low-modulus, UV-stable, acetoxy-free
Shelf Life12 months in unopened original packaging at ≤25 °C
Curing MechanismMoisture-cured at ambient temperature; surface tack-free in ~30–60 min (23 °C / 50% RH)
Hardness (Shore A)~25–30 after 7 days (23 °C / 50% RH)


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