NI-DURA HYDRO-GLASS FLOOR AND DECK SYSTEM consists of a waterproof primer and membrane to seal the tongue & groove plywood sub-floor & seams, and an overlay of Northern NI-21 EPOXY & CHOPPED FIBERGLASS . The fiberglass and epoxy marry for added strength and flex that make this system ideal for a weatherproof roof or deck. In areas where a high build is needed in the shortest time, NI-DURA HYDRO-GLASS is applied in 1/8th'' thickness per layer. A variety of colors and finishes are obtained with the use of pigmented NI-21 EPOXY, or NI-DURA COLOR QUARTZ. Call (800) 346-5543 product data, specifications, or a local installer of NORTHERN SEAMLESS FLOORING.