Elastomeric or liquid waterproofing mem.nes are one of the most convenient methods of waterproofing shower walls before installing tile. These mem.nes consist of products such as Custom Building Products’ Redgard and Laticrete’s Hydrobarrier and Hydroban and Mapei’s Aquadefense. I will refer to all the mem.nes as.Aquatic’s A Composite shower base is in. x in. x in. This pan has a center drain. It features a patented system of design elements that ensure water is directed away from walls and toward the drain..Register for Mortar Shower Base Waterproofing to learn how to properly install tile in a shower. This is a CTEF tile installation training course..DreamLine SlimLine Single Threshold Shower Base in White Center Drain Base with Back Walls incorporates a low profile design for a modern look..