FMC 200 is the strongest of the polysulfides, can be used for casting any of the above materials and is widely used by foundries. Ideal for wax or plaster casting. (Not to be used with resin or silicone casting.)
FMC-200 is a polysulfide rubber mold compound with high tear strength that cures overnight with negligible
shrinkage. Molds made of FMC-200 are very durable and will perform in production. The mix ratio is 100
parts of Part A to 12 parts of Part B by weight. FMC-200 is ideal for those applications that require capturing intricate detail from a variety of model surfaces.
Unlike polyurethanes, FMC-200 is not sensitive to moisture and can be poured directly over wet plaster or
water/sulfur based clays. Common applications include molds for foundry and pattern work, sculpture (lost wax
process), casting various gypsum products and waxes.