Designed for exterior wood applications, EXTERIOR 450 varnish provides your wood with a tough, protective outdoor water-base wood finish that will withstand the rigors of the sun, rain, and wind. Can be used as a tint base to create custom colors. Ideal exterior furniture finish, exterior door finish or deck finish, and is fortified with UV absorbers to help minimize fading and maximize performance. Its built-in mildewcide retards mold and mildew growth. Tough and flexible, it will resist the expansion and contraction of the wood through hot summers and cold winter. Warning: We do not recommend Ext 450 stains or topcoats for exotic woods Ipe, teak, or other dense oily woods that will get exposure.