Permatex's Ultra Red Gasket Maker, 3.35 oz., is ideal for high temperature repairs. Its advanced formula retains a high temperature resistance while also remaining resistant to oils and common shop fluids. High temperature performance and adhesion. Offers higher temperature resistance than regular RTV Red. OEM specified. Sensor safe, low odor, non corrosive. Non-flammable, non toxic, Can be used as a gasket maker or dressing. Meets performance specs of OE silicone gaskets. Withstands up to 650650°F (343 343°C) intermittent. Top Job Applications: Header, manifold, slip fit exhaust parts, turbocharge.