UGC Free - Kiln release
FREE is a high temperature shelf release product made by UGC and it is used to allow the glass to move "freely" on the surface as it expands and contracts while being fired. The best way to apply FREE is to place it in an old cotton sock and use that to dust the surface of a primed kiln shelf or mould before placing glass on the surface. Especially helpful when slumping or draping glass over forms.
Available in 3 oz (85g) and 13 oz jars (368g)