Oatey PVC Shower Pan Liner is an economical, flexible liner designed to provide a waterproof seal to tile shower bases and for other concealed waterproofing applications. It is made of abrasion-resistant PVC material for long-lasting use and is marked on the back in 6 in. increments to allow for easy measuring and trimming. This kit also includes two Oatey PVC Dam Corners, preformed, flexible corners designed to seal the junction of the curb and door jamb. Oatey products have earned the trust of plumbing professionals for over 100 years.