Formulated for hi-temp applications, or heavy-duty use (such as towing). Replaces almost any cut gasket by making reliable "formed-in-place" gaskets that resist cracking, shrinking and migrating caused by thermal cycling. Coats pre-cut gaskets to increase reliability. Temperature range -65 Deg. F to 650 Deg. F (-54 Deg. C to 343 Deg. C) intermittent; resists auto and shop fluids.