Epoxy resins produced from such epoxy monomers are called glycidyl-based epoxy resins. Epoxy resin is almost transparent when cured. It is mainly used resins based on epoxy resin. Dow manufactures epoxy resin intermediates including bisphenol A and epichlorohydrin. Tissues are commonly embedded in epoxy or other plastic resin. Also aliphatic glycidyl epoxy resins usually have a low viscosity compared to aromatic epoxy resins. Epoxy and polyester resin are the most common types. In composite materials, epoxy, polyester or phenolic resins are common. Like other tertiary amines, it catalyzes the formation of urethane foams and epoxy resins. Epichlorhydrin is a raw material for epoxy resins. These species are used as curing agents in epoxy resins. They are substitutes of epoxy, phenolic and bismaleimide resins. The strength of epoxy adhesives is degraded at temperatures above . The body is made from a high-temperature epoxy fiberglass laminate. One particular risk associated with epoxy resins is sensitization.