Flat trim moulding becomes a defining addition to simple door and window casings and a complimentary addition to larger enhancements. Flat trim moulding addresses decorative improvements both inside and out. The durable, water-resistant nature of urethane allows for exceptional performance in exterior applications. Flat trim moulding is non-porous. It locks out the moisture that causes warping, cracking and decay. Non-porous urethane products also hold paint well due to low moisture absorption. Flat trim moulding is pre-primed and ready for finishing.