Use in Petrol & Diesel Engines. Most rear main seal leaks are caused by a combination of normal wear in the crankshaft & seal and the drying, hardening and shrinking of the main seal. Rislone Rear Main Seal Concentrate is specifically designed to seal rear main seal leaks, but it also works better than a conventional stop leak on all other leaks, including timing cover seals, cam seals, rear main seal, O-rings and other gaskets.
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