Stone Die & Plaster Hardener resin has been designed to significantly reduce abrasion and wear of stone and plaster models. Apply with brush on stone dies, margins, all occlusal surfaces, abutments, to minimize wear. Creates negligible film thickness. Its thin consistency allows penetration of it's plastic component into the hardest of stones, making not only a harder surface, but one that is plasticized and sealed. It does this without causing unnecessary buildup on the stone surface.