Oxygen sensor safe, non-corrosive motorcycle sealant can be used for crank cases. Use without a gasket. More viscous than 1104, doesn't sag, impervious to petrol, oil, gas, water.
Very good for copper head gaskets on race engine. Pulls apart quite easy and cleans up. Copper gasket can be re-used. Temperature range -60 to 250 degrees C.
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