Permatex Ultra Grey Rigid High-Torque RTV Silicone Gasket Maker is designed specially for high-torque and high vibration applications, like those common in import engines. This premium RTV gasket maker exceeds manufacturers' performance requirements, featuring maximum vibration resistance and outstanding resistance to oils, cooling and shop fluids. This gasket maker is guaranteed not to leak. OEM specified, with a temperature range of -65 degrees fahrenheit to 500 degrees fahrenheit, intermittent. Permatex always has the right gasket maker for your application.