Constructed of PVC or polycarbonate and engineered for highly corrosive areas or wet outdoor locations, O-Z/Gedney weatherproof single- and two-gang boxes, covers, and lamp holders help prevent entry of dirt, dust, and moisture into electrical systems. According to the manufacturer, continuous box and cover compression ensures complete sealing at the gasket interface. In addition, the manufacturer says, the products resist impact, mold, and distortion from extreme weather temperatures. All products in the collection are cULus-listed and UL- and CSA-certified.