SMC is available in long glass or carbon filled sheet. The resin matrix can be polyester, vinylester or epoxy, and fiber fill can be from 15% to 63% by weight. It is utilized for many high-strength applications as well as body panels on automobiles.

BMC - Bulk Molding Compound

This material is usually supplied in long glass-filled versions of polyester, vinylester, epoxy, or phenolic, and is supplied in bulk form or extruded to shapes. It is lower in strength and cost compared to SMC. BMC is utilized extensively for electrical as well as high-quality appearance applications.

Granular Thermosetting Compounds

The original, short-glass versions have been around for years. Lower in strength and higher in cost, these materials are usually used in injection or transfer molding applications. Typical polymers utilized are melamine, phenolic, epoxy, or diallyl phthalate (DAP).