The most common cause of a rear main seal leak or any other engine oil leak is usually age or high mileage, however, a leak can be caused when a vehicle is stored for an extended period of time, or when it has run low on oil. This causes the drying and hardening of the seal, leading to shrinking, cracking and tearing.
Rislone Rear Main Seal Repair works in two ways to repair all engine seal leaks, firstly, the seal restoring additives restore seal size, flexibility and elasticity, and secondly the seal polymer works by building a polymeric film around the rear main seal and also filling in any groove worn into the crankshaft by the seal. Rear Main Seal Repair restores the seal to like-new condition and also contains additives to stop leaks in severely worn seals and crankshafts.
Even though Rislone Rear Main Seal Repair is specifically designed to seal rear main leaks, it works better than a conventional stop leak, on all engine oil leaks, including timing cover seal, cam seals, O-rings and other seals and gaskets. Rislone Rear Main Seal Repair works with ALL petrol and diesel engines using conventional, high mileage and synthetic oil. It contains no particles so will not clog your oil filter.