This subtle cove moulding style features fine details and a simply elegant design. Cove moulding is most commonly used in crown moulding applications, but less specifically, it is often used as a decorative element between a vertical base and a projecting horizontal element. The concave form of cove moulding creates a detailed and smooth transition between surfaces while ornamenting the space where the two elements join. This moulding is suitable for use both inside and outside of the home. Urethane has become increasingly popular for its high performance characteristics. Urethane is non-porous, so it does not absorb much of the moisture that can cause peeling, cracking, staining and decay.