Ultra WOOD Rx + combines the superior durability characteristics of our original WOOD Rx formulation with new and improved application and wear properties. Ultra WOOD Rx + spreads effortlessly and evenly and its unique formulation resists the lapping characteristics inherent in most transparent wood sealers. The ultra formulation also exhibits uniform wear characteristics which makes maintaining wood quick and easy. This silicone modified acrylic formulation resists moisture penetration, retards the aging (silvering) process of new wood and contains an increased level of fungicide which resists mildew growth in the harshest climates. Ultra WOOD Rx + is the best prescription for wood protection. Color: Mahogany Transparent Matte.