CASTLE STONE RUBBER mould Rubber moulds have the abrasion resistance and tear strength needed to keep production moving. Casting concrete into rubber moulds lets you make perfect copies of any original every time! Moulds are ready for casting same day and last in production..saving you time, labour, and material costs. Urethane moulds are used everyday by professionals to make architectural elements, concrete stone veneer, formliners, concrete countertops, GFRC panels, concrete statues and furniture and the list goes on. These moulds can be used over and over. You are purchasing one 14 section urethane mould for casting plaster, concrete and polymer concrete. Mould size 4.66 SQ.FT(0.43m2). approximate. Measurements - 28" X 24" X 2.5" inch(71cm X 61cm X 6cm) Mould's cavities - 14.