WEICON Black-Seal adhesive and sealant is black, high-temperature
resistant (+280°C/+536°F), free of solvents, strong, oil-resistant,
grease-resistant, pressure-resistant, resistant to ageing and extremely
elastic (breaking elongation of approx. 500%).
Black-Seal is suitable for bonding and sealing in applications where
particularly high oil and grease resistance is required.
WEICON Black-Seal can be used on gearbox, valve and casing
covers, oil sumps, water pumps, gears and axles, flanges, tanks and
containers, and in many other areas.

Processing
WEICON elastic one-component adhesives and sealants are supplied
either in tubes or in Euro cartridges (Black-Seal also in 200 ml press
pack). Euro cartridges are processed with a cartridge gun or with
automatic dosing systems. WEICON Speed-Flex should be applied
only with professional-quality cartridge guns (WEICON Cartridge Gun
"Special").
Joining the parts to be bonded
To ensure optimum wetting, the parts must be joined before the first
skin has been formed on the adhesive (skin-over time).
Curing
All elastic one-component adhesives and sealants from WEICON cure
under the influence of humidity. The curing process starts at the
surface and proceeds toward the inside. At 50 % relative humidity and
+23°C, the cure speed is approx. 3 mm in the first 24 hrs.
Adhesive bonds of big surfaces and high layer thicknesses cure more
slowly since the humidity can not penetrate so fast to the inside if the
outer layers have already cured. Higher temperatures or higher
humidity accelerate the curing, while lower temperatures or low
humidity slow it down