PureStrength™ PVC Resin gives our designer clapboard its basic strength and weather resistance. It prevents moisture infiltration from rain and humidity, so panels won't rot, warp, shrink or swell. The result is low-cost, easy-care maintenance. Ti-Pure™ titanium oxide prevents ultraviolet degradation , so even hot summer sun wont damage our designer clapboard beautiful surface. TrueShield™ impact modifiers give our designer clapboard exceptional impact resistance, helping to prevent denting and dinging from routine around-the-house activities. DecoratorsChoice™ pigment concentrates are used to produce uniform colors that go clear throughout our designer clapboard panels. You'll never have to stain or paint again, because the color won't wash away.