Waterproof PVC Slatwall Panel for Garage Wall Storage This waterproof PVC slatwall panel turns a bare garage wall into a fully organized storage area. The 17mm cellular PVC body does not swell or rot when a wet car, a garden hose or a damp basement wall is next to it, and at 300mm wide by 1.22m or 2.44m long each panel covers a full wall with fewer joints. Tongue and groove edges interlock, so two people can finish a wall in one afternoon with a drill and a level, and shelves