The EPEX 30P range of treated wood products is supported by a 30-year limited warranty for protection against rot, mold, mildew & termites. It is treated with Arch Chemicals Frameguard and offers a 30-year warranty. The trim boards are primed and buffed 3 times with a satin finish using Sherwin Williams exterior ecrylic latex Superpaint primer with Advanced Resin Technology that offers a 15-year primer warranty.