RZ Water-Tight ABS & Polycarbonate Enclosures Hammond Manufacturing RZ Water-Tight ABS and Polycarbonate Enclosures feature a gasketed lid with a two-piece tongue and groove construction for protection against oil, dust, and water. Hammond RZ Water-Tight Enclosures provide IP65 protection and a choice of opaque or clear lids. These enclosures are ideally suited for mounting PCBs and DIN-rail-mounted components.