Researchers first introduced two-component epoxy-resin paints as a pavement marking material in the 1970s and have since developed it into a common pavement marking material used by many agencies. Epoxy materials are durable, sprayable materials that provide exceptional adhesion to both bituminous surfaces and hydraulic cement concrete surfaces with good abrasion resistance. Epoxies are more expensive than standard paints and are about the same cost or slightly more expensive than most thermoplastics. A variety of formulations are available on the market from many vendors.