Fundo Primo 36 in. x 72 in. Shower Kit with Center DrainThe wedi Fundo Primo Shower Kit contains all products needed to build a wedi shower. No more guess work, all materials and quantities are estimated for you. The Primo Kit is internally waterproof due to its wedi XPS foam's closed cell structure and naturally protect against mold or mildew like every wedi XPS foam based product. The Fundo Primo Kit adds speed, safety and consistency to your installation: Measure, possibly cut, thinset to subfloor,