Architectural Restoration Candle Making Concrete Casting Prototyping Sculpture Taxidermy Special Effects  Life Casting Spraying Rubber And Plastic

FAQ   Video Library

Find Your Nearest Distributor

Order Online

 

Press Releases Seminars

Smooth Talkin' Contents
<--back

New Polysulfides
Polysulfide Mold Rubbers Now Available

We pioneered polysulfide elastomer chemistry in the 1950’s and continue to supply the major tire manufacturers and art bronze foundries around the world. Lead cured polysulfides remain an environmental issue, and we do offer manganese products. But lead cured polysulfides remain the most widely used. 

We have not introduced a new polysulfide for some time and are pleased to add products to the FMC line. They have been tested extensively by both tire mold producers and art bronze foundries and are currently being purchased in drum quantities by both types of customers.

Manganese Curative / FMC- 209 is a soft Shore 12A version of our popular FMC-208 Manganese Curative. Where lead is an issue, these two products can be offered as an alternative and are the best manganese cure polysulfides on the market. Very Soft / FMC- 214 Lead Curative - is a very soft Shore 5A and is used for making molds of originals with severe undercuts. Fast Cure / FMC- 220 Lead Curative - is a Shore 20A and is ready for production in 8 hours. Fast Cure / FMC- 222 Lead Curative - is a Shore 28A and is ready for production in 8 hours.

Remember, the advantages of polysulfides is that they cure over wet models and are not inhibited by sulphur, which is present in many modeling clays. Also, they have tremendous stretch and very long mold life (we’ve seen molds that are 30+ years old - still usable). The negatives include lead curative (which is why we have FMC-208 & 209), offensive odor and an inability to cast anything but wax or gypsum plasters and expect a long mold life.