The Superior Pro-Shield Shower System contains all the pieces and accessories you need to fully waterproof and prepare a shower for tiling. Build your shower with boards, membranes, curbs and a shower pan to establish the base shape. Then complete with the finishing touches like drains and valve seals. Superior Pro-Shield Board is an XPS foam panel manufactured to offer builders and tile contractors a strong, lightweight, waterproof and vapor-resistant tile base for wet areas. It’s reinforced with an alkali-resistant fiber mesh offering exceptional bonding strength.