Polyurethane Coating

Polurethane coating :
urethane coating are available in three grades: aliphatic, aromatic and waterborne. The major difference is that single component aliphatic will not amber when subjected to high ultraviolet light. The single component moisture cure type is referred to as a moisture curing urethane. In the two-component the isocyanates react with another resin to form a film that provides three excellent qualities: chemical and solvent resistance, color and gloss retention, and abrasion resistance. And waterborne will not amber like aromatic type urethane. Polyurethane coating have uv absorbers for exterior durability.