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

Wacker SEMICOSIL 988 1K Two-Component Silicone Rubber

Wacker SEMICOSIL 988 1K is a platinum-cured, one-component addition-cure silicone rubber offering excellent thermal stability, low compression set, and fast room-temperature curing without peroxides. Ideal for encapsulation, sealing, and precision molding in electronics and automotive applications. Meets UL 94 V-0 flammability rating and RoHS compliance.
  • wacker semicosil 988 1k two component silicone rubber_c232afb4
  • wacker semicosil 988 1k two component silicone rubber_c232afb4

Features Of Wacker SEMICOSIL 988 1K Two-Component Silicone Rubber

  1. Platinum-catalyzed addition-cure system enabling precise, controllable vulcanization without by-products.

  2. Excellent high-temperature stability with continuous service capability up to 180 °C.

  3. Outstanding electrical insulation properties and low dielectric loss across wide frequency ranges.

  4. Good adhesion to various substrates including metals, plastics, and cured silicone surfaces.

  5. Low viscosity before curing for easy dispensing, mixing, and void-free encapsulation.

Typical Applications Of Wacker SEMICOSIL 988 1K Two-Component Silicone Rubber

  1. Encapsulation and potting of power electronics, IGBT modules, and EV battery control units.

  2. Thermal interface materials (TIMs) for heat dissipation in LED drivers and power converters.

  3. Insulating coatings for high-voltage sensors and automotive ignition components.

  4. Sealing and bonding of precision optical housings and medical device assemblies.

  5. Protective overmolding of flexible printed circuits (FPCs) and hybrid microelectronics.

Specifications Of Wacker SEMICOSIL 988 1K Two-Component Silicone Rubber

Chemical TypePlatinum-catalyzed addition-curing silicone rubber
Product FormTwo-component liquid system (Part A + Part B)
AppearanceTransparent, low-viscosity liquids (Part A: clear; Part B: faintly amber)
Base PolymerDimethyl/methylvinyl polysiloxane (Part A), methylhydrogen polysiloxane + platinum complex (Part B)
Mixing Ratio (by weight)1:1 (A:B)
Cure MechanismAddition reaction (hydrosilylation)
Shore A Hardness (cured, 7 days @ 23 °C)55 ± 3
Density (23 °C, g/cm³)1.06 ± 0.02


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