Epifanes Poly-urethane Topcoat, Black Green. Two-component polyester saturated aliphatic urethane finish. A finishing coat for fiberglass, steel, aluminum and wood. Can use on epoxy primed substrates, be applied directly on painted wood, or on thoroughly cleaned & degreased fiberglass surfaces above the waterline. Easy application by brush, roller, or spray. Hard dry in 8 hours at 65 deg. F and re-coatable in 24 hours.