3M 2136 Scotchcast™ Wet Niche Potting Kit is designed to provide protection against corrosion and possible deteriorating effects of fresh swimming pool or fountain water and sunlight by reliably encapsulating the 8 AWG ground connection in a wet-niche shell as required by NEC®when using rigid, non-metallic conduit in the installation of wet-niche underwater lighting fixtures. The 2136 compound is UL Listed as a potting compound for swimming pool, fountain, or spa equipment and is for use only where adhering to copper, copper alloy and stainless steel materials.