Nova USA Wood Products says that it has enhanced the color retention of its ExoShield Wood Stains. The improved formulation includes proprietary polymerized oil resins as well as the highest amount of UV blockers that can be added while allowing the formula to stay in suspension. The combination of the new resins with the manufacturer’s blend of tung oil, UV blockers, fungicide, and trans-oxide pigments is designed to provide long-lasting results with superior penetration. Available in six colors and a clear finish, a gallon retails for $125.