We use silicon material that resists upto 250 degree C for longer lifespan.

Suitable for all vehicles equipped with steel made radiator cap!    Specify your vehicle model & year when you buy this product. 

Raising the radiator pressure from original setting (usually 0.9~1.1bar) to 1.3 bar： As long as the radiator pressue being raised, coolant boiling point is raised and will be kept in engine & radiator instead of being released to overflow reservior.