WEICON Black-Seal

Special Silicone / Adhesive & Sealant


Weicon Black Seal is a special silicone adhesive and sealant that combines excellent oil and grease resistance with high temperature performance. This grade of silicones is black in colour and adheres well to a variety of materials including steel, aluminium, glass ceramic and more.

Features and Benefits

  • Excellent resistance to oils and greases
  • Good pressure resistance
  • Controlled swelling characteristics
  • Leak proof sealing
  • Very good UV stability
  • Good aging resistance
  • Elongation at break of 500% (approx.)
  • High temperature resistance (up to 300ºC for short periods of up to 2 hours)

Typical Applications

Because of its excellent adhesion, long lasting sealing performance and resistance to temperature, aging, oil and grease; black seal is used to seal in a variety of demanding applications. These include:

  • Gearboxes, valve and housing covers
  • Oil trays and pumps
  • Water pumps
  • Gearboxes and axles
  • Flanges
  • Tanks and containers

Surface Preparation

Before applying Black Seal, it is important to ensure that the surfaces are clean and grease free. Many surface contaminants (e.g. dirt or dust) can be cleaned with Weicon Surface Cleaner. For heavily soiled surfaces, Weicon Cleaner Spray S may be more suitable. Old paint or adhesive residue may be removed using Weicon Sealant and Adhesive Remover.

If bonding to smooth surfaces it may be advisable to slightly roughen these materials as this will significantly improve the adhesive power achieved.

Video Tutorial:




Additional information

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