The Compleat Sculptor
" You supply the talent, we'll supply the rest!" Since 1995
Mold Making Compound Index & Mold Making and Casting Accessories & Casting Materials

Polysulfide Mold Compounds

Polysulfides ... consist of two parts- a base compound and a curing agent, which are mixed just prior to application. Curing takes place with negligible shrinkage at room temperature, producing molds suitable for casting gypsum plasters and cements, waxes and Forton MG. (Not to be used with resin or silicone casting.) This material, although very smelly and gooey, is a consistent and reliable rubber. Affectionately known as Good Old Black Tuffy!

FMC 200

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.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
20
Black
100A : 12B by wt
50 min.
24 hrs.
Order #
Size
Weight
Buy Me
66F200C
5 Gallon kit - FMC 200 (contains: 5 gal. part A, 2 qt. part B)
56 lbs
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FMC 201

FMC 201 is a more flexible version of the FMC 200. It allows a more detailed and highly undercut piece to be molded with extreme accuracy. The flexibility also enhances the quality of the casts poured into the mold. (Not to be used with resin or silicone casting.)

FMC-201 is part of the Smooth-On family of polysulfide rubber mold compounds. FMC-201 cures overnight (faster or slower cure possible with different curatives) with negligible shrinkage to a soft Shore A15 rubber that stretches and exhibits good tear resistance. Molds made of FMC-201 are very durable and will perform in
production. FMC-201 is ideal for those applications that require capturing intricate detail from a variety of model surfaces.

Unlike polyurethanes, FMC-201 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.

Shore A
Color
Mix Ratio
Pot Life
Cure Time
Made by:
15
Black
100A : 12B by wt
50 min.
24 hrs.
Order #
Size
Weight
Buy Me
66F201C
5 Gallon kit - FMC 201 (contains: 5 gal. part A, 2 qt. part B)
56 lbs
Shop Now

Extra Catalyst For FMC 200/201
  • Standard Catalyst
Order #
Size
Weight
Buy Me
66FCAT2
1 quart
3 lbs
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