€¢ recommended for use with Oatey X-15 Bonding Adhesive and Dam Corners €¢ 40 mil thicknesses €¢ Ready to use waterproofing membrane for tile showers or other concealed waterproofing applications €¢ Made of durable flexible PVC €¢ Liner marked in 6-in increments for ease of measuring and trimming €¢ Meets ASTM Spec D4551 €¢ Superior cold weather characteristics €¢ IAPMO Listed Oatey® PVC Shower Pan Liner is an economical; flexible liner designed for use in tile showers and other concealed waterproofing applications. It's made of 30 or 40 mil thick; flexible PVC sheet and marked in 6 in increments for easy of measuring. Oatey products have earned the trust of plumbing professionals for over 100 years."