Tomei Powered's very own bolt smooth paste. This is one of TOMEI's most essential tools which helps with the engine building process and to aid with the extended life span of your engine internals. The TOMEI Bolt smooth paste is designed to be used on bolts and screws that are used with washers for hot part items like the exhaust system. This paste is applied on the washer and a small section on the seating surface to prevent rust welding and metal burns so that it can be easily removed the next time when needed. No more messing about with nuts and bolts heat/rust welded together and save your time, money and headaches. This is a popular product for workshops who regularly exchange exhaust systems and parts in Japan.