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
Typical Characteristics
| Basis | Acetate |
| Density | 1..06 g/cm³ |
| Viscosity | Pasty |
| Colour | Black |
| Stability (ASTM D 2202) | >1mm |
| Processing Temperature | +5ºC to +35ºC |
| Cure Type | Humidity |
| Curing Conditions | +5ºC to +40ºC 30% to 95% rel. humidity |
| Skin Over Time | 7 min. |
| Cure Speed (first 24hrs) | 2-3mm |
| Max Gap Filling | 5mm |
| Over paintable | No |
| Elongation at Break (ASTM D 412 / DIN 53504) |
500% |
| Movement Capacity Max. | 15% |
| Solid Content | 96% |
| Dielectric Strength | 21 kV/mm |
| Temperature Resistance | -60ºC to +280ºC |
| Temperature Resistance Short Term (2 hours) |
300ºC |
| Building Material Category DIN 4102 |
B 2 |
Available Sizes
Weicon Black Seal is available in either a 85ml squeeze tube, 200ml press pack or in a standard 310ml cartridge. The 200ml press packs can be dispensed without additional equipment which makes them ideal for field applications and fast repairs while the 310ml cartridges can be dispensed using a standard silicone dispensing gun.
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.
For more information on surface preparation, processing and storage or Weicon Black Seal, it is suggested that users consult the appropriate TDS and SDS.
Adhesive Finder Tool
Unsure if this adhesive is suitable for your application? Try Weicon’s handy Adhesive Finder tool!
