RedGard waterproofing products are available for purchase at The Home Depot and Amazon.com. As RedGard's manufacturer, Custom Building Products, points out, not all RedGard products are available for purchase at all brick-and-mortar stores; consumers may need to purchase online or contact distributors for some products.
The Home Depot sells RedGard's waterproofing and crack prevention membrane in 1- and 3 1/2-gallon sizes, as of 2015. Amazon.com carries the same products and also sells RedGard's shower waterproofing kit that allows builders to prepare shower surfaces for tiling. Builders can use RedGard's waterproofing membrane under both tile and stone in both interior and exterior commercial or residential applications.