BlueDevil Oil Stop Leak seals engine oil leaks permanently. It is non-clogging and will not harm your engine. BlueDevil is safe and easy to use and is compatible in gasoline or diesel engines. BlueDevil Oil Stop Leak is an oil leak sealer that will stop leaks permanently.

• Guaranteed to permanently seal seeping or dripping oil leaks 
• Repairs and reconditions rubber seals throughout any fluid oil system