<p>Heat curing, Dense putty impregnated with metal and carbon fibers, Tan color. Below 550ºF (288ºC), speed up the cure by adding SF-ACC Accelerator (always use accelerator when sealing boiler feed water). Shelf-life is 6 months in closed container. Refrigerated storage recommended. </p><h2>Applications</h2><p>High pressure boiler feed water, Steam, Condensate, Hydrocarbons. Designed for bridging large gaps or voids such as uneven flange faces. </p>