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

Wacker ELASTOSIL 4300 One-Component Silicone Sealant

Wacker ELASTOSIL 4300 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 UV resistance and long-term elasticity. Ideal for bonding, sealing and potting in electronics, automotive and architectural applications where reliability and durability are critical.
  • wacker elastosil 4300 one component silicone sealant_d4c6fd8d
  • wacker elastosil 4300 one component silicone sealant_d4c6fd8d

Features Of Wacker ELASTOSIL 4300 One-Component Silicone Sealant

  1. Room-temperature vulcanizing (RTV) silicone sealant with excellent adhesion to glass, metals, and most plastics without primer.

  2. Low modulus formulation provides high elasticity and long-term movement capability (±50% joint movement).

  3. Excellent resistance to UV radiation, weathering, ozone, and extreme temperatures (–60 °C to +200 °C continuous).

  4. Non-corrosive, neutral-cure acetoxy system — safe for sensitive substrates including aluminum and electronics.

  5. Good electrical insulation properties and low smoke emission when exposed to flame.

Typical Applications Of Wacker ELASTOSIL 4300 One-Component Silicone Sealant

  1. Sealing and bonding in LED lighting housings and optical assemblies.

  2. Encapsulation and potting of electronic components and sensors.

  3. Glazing and perimeter sealing of architectural glass façades.

  4. Automotive lighting modules and sensor housing assembly.

  5. Industrial equipment gasketing where thermal cycling and vibration resistance are required.

Specifications Of Wacker ELASTOSIL 4300 One-Component Silicone Sealant

Chemical TypeAcetoxy-curing polydimethylsiloxane (PDMS)
Product FormPaste-like, thixotropic, single-component
AppearanceOpaque white or translucent gel
Primary ApplicationsSealing, bonding, encapsulation, and gasketing
Key FeaturesRTV, high elasticity, UV stable, non-corrosive
BenefitsNo primer needed on most substrates; fast surface cure (1–2 mm/day at 23 °C/50% RH)
Shelf Life12 months in unopened original packaging at ≤25 °C
Storage ConditionsStore in dry, cool place away from direct sunlight and moisture


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