MR-97 MOLD RELEASE FOR GLASS CASTING AND SLUMPING is a high concentration boron nitride spray for stainless steel and ceramic molds. Works at temperatures up to 1800°F. Shake can well, apply light coat, wait five minutes and apply a second light coat. Wait 15 minutes and you're set to go. As recommended by Colour de Verre for their line of casting molds Must go UPS Ground to lower 48 states only. No mail or air or foreign shipments possible. We cannot ship to Post Office Boxes
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