Bar's Engine Oil Seal Sealant 350ml Engine oils and lubricants are formulated with many different types of additives. These additives are necessary to extend the life of the oil, stabilize biochemical components, reduce friction and remain compatible with modern combustion engines. As vehicles age, O-rings and seals lose their elasticity, harden and shrink, allowing engine oil to leak and contaminants penetrate the system. Bar's Motor Oil Stop Leak is designed to repair and renew old and worn seals, o-rings and gaskets so no engine oil leaks. After applying, drive 200-480 miles to allow Bar's Motor Oil Stop Leak to penetrate the engine gaskets and seal the leak. Benefits | Stops engine oil leaks. Restores worn seals and sealing rings. Compatible with all engine oils. Non-corrosive, non-clogging and non-foaming. Under normal wear, O-rings and seals harden and become brittle. Bar's Motor Oil Stop Leak is formulated with a seal conditioner to rejuvenate and stop seal leaks. Bar's Leaks Motor Oil Stop Leak is compatible with all types of engine oil. 1 can is enough for 4-6 litres of oil.