Carbamac 43-4355 Polyurethane Resin Hexion Specialty Chemicals North America Polyurethane (PU) - Polyols Coatings mineral spirits Carbamac™ 43-4355 is an oil-modified, polyurethane resin. It possesses good viscosity allowing higher build clears, good time to recoat, good color retention, good hardness, toughness, and abrasion resistance. Oil Modified Aromatic Polyurethane Resin. Offers good viscosity allowing higher build clears. Possesses good time to recoat and good color retention. Provides good hardness, toughness and abrasion resistance.