large silicone mat 28 x 20 inch 1.5mm thick casting resin heat resistant silicone work mat for epoxy resin crafts cast iron jewelry placemat grey is up for auction in Arts, Crafts & Sewing. The current bid is $1.50, 98% below the $100.00 MSRP, in Good Condition. This auction has ended — similar items appear in live auctions regularly.