Bardahl Engine Stop Leak is a product that can be added to engine oils to stop or strongly reduce oil leakages, because of not well seals or rings. It is miscible with all types engine oils and makes seals of synthetic and nature rubber smooth. It can also be preventively applied to reduce future oil leakages. The effect of the using Bardahl Engine Stop Leak: Makes synthetic seals and nature rubber seals smooth. Does stop oil leakages whereas while driving. Raises the engine performance. Makes stuck piston loose. Reduces the oil consumption. Can be mixed with all types motor oils.