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SEMICOSIL® 986/1K

1 of 27 products in this brand
SEMICOSIL® 986/1K is a thermally curable, one-part silicone rubber known for its non-slump properties. It is a ready-to-use system, requiring no additional mixing. The silicone rubber is thixotropic in nature and exhibits a translucent appearance. SEMICOSIL® 986/1K possesses medium hardness and high flexibility, making it suitable as a low-stress adhesive. It offers primerless adhesion to various substrates. Furthermore, this silicone rubber undergoes rapid heat curing and features ultraviolet fluorescence properties.

Product Type: 1K (1 component) Adhesive

Application Area: Electric Vehicle (EV) Batteries, Electrical Components, Form In Plastic Gaskets (FIPG), Housing, Power Control Unit (PCU)

Cure Method: Chemical Cure, Heat Cure

Chemical Family: Silicones

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family

Features & Benefits

Applications & Uses

Applications
  • Automotive Electronics
  • Bonding & Sealing
  • Electrics & Electronics
  • Electronic Control Unit (ECU)
  • Power Control Unit (PCU)
  • Power Electronics
  • FIPG applications
Application Details

Processing

  • Surface preparation
    • All surfaces must be clean and free of contaminants that will inhibit the cure of SEMICOSIL® 986/1K. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds. If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.
       
  • Dispensing
    • Because of the thixotropy (shear thinning effect) SEMICOSIL® 986/1K can be dispensed easily with all dispensing equipments. Since silicones dissolve notable amounts of air, an in-line degassing is recommended.
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  • Curing
    • SEMICOSIL® 986/1K works best when cured at 115 °C or more depending on the size and heat sink properties of the components.
    • Temperature Curing time, thickness 10 mm
      • 100°C - 6 h
      • 130°C - 30 min
      • 150 °C - 10 min
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  • Adhesion
    • SEMICOSIL® 986/1K shows good primerless adhesion to many substrates. We recommend running preliminary tests to optimize conditions for the particular application.

Properties

Cured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)1.07g/cm³DIN EN ISO 1183-1 A
Elongation (at break)200%DIN 53504 S2
Modulus (at 100 % elongation)3N/mm²ISO 37
Shore Hardness A51ISO 868
Tear Strength8N/mmASTM D 624 B
Tensile Strength5N/mm²DIN 53504 S2
Uncured Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)1.07g/cm³DIN EN ISO 2811-1
Dynamic Viscosity (at 25°C, Shear rate 0.5 s⁻¹)300000mPa·sISO 3219
Dynamic Viscosity (at 25°C, Shear rate 25 s⁻¹)35000mPa·sISO 3219
Properties
  • Ready-to-use, one-part system
  • Thixotropic
  • Translucent
  • Medium hardness
  • High flexibility (low-stress-adhesive)
  • Primerless adhesion to many substrates
  • Rapid heat cure
  • Ultraviolett fluorescing
Note

Cured for 30 min at 150 °C in a circulating air oven.

Regulatory & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania

Storage & Handling

Storage Information

SEMICOSIL® 986/1K should be stored between +5 and +25°C in its tightly closed containers.