Stoner Thermoset Mold Release E497 – Thermoset Mold Release Stoner® E497 Thermoset Mold Release is specially formulated as release agent and anti-stick lubricant for molded thermoset plastics, rubber, and similar materials. It allows molded parts to be painted, plated, hot stamped, adhesive bonded, labeled, or otherwise decorated. Stoner Thermoset Mold Release is available through HeatSource.