BMC is manufactured by mixing strands (Greater than 1/8” and less than 2") of chopped glass fibers, styrene, an initiator, and filler in a mixer with an unsaturated thermoset resin (commonly polyester resin, vinyl ester resin or epoxy resin).
When manufacturing BMC, strands (over 1/8” and under 2”) of chopped glass fibers, styrene, an initiator, and filler are mixed in a blender using an unsaturated thermoset resin such as polyester, vinyl ester, or epoxy.