OATEY 41584 6 ft. x 33 ft. 40 Mil Black – Roll

Oatey 41584 is a chlorinated polyethylene (CPE) shower pan liner supplied as a 6 ft by 33 ft roll at 40 mil thickness. That covers 198 square feet of floor and wall turn-up from a single roll, so one roll handles several standard shower bases.

The 41584 liner meets ASTM D4068, the standard specification for chlorinated polyethylene sheeting used as water containment membrane in shower pans. That is the reference most plumbing inspectors cite for a sheet pan liner.

The 41584 is the membrane only, sold as a bare roll. A conventional CPE pan needs a clamping-ring (sub-drain) shower drain so the liner can be sandwiched and bolted at the drain, plus solvent-type CPE adhesive or preformed corners for the seams and corners. Order those separately.

A sheet liner like the 41584 is the traditional approach: you lay the 40 mil CPE membrane over the sloped sub-base, turn it up the walls, and set the mud bed and tile over it, with a clamping drain to tie the liner in. Liquid membranes are rolled or troweled on and cure in place, which suits odd geometry and curbless openings. Pick the sheet liner when you are building a conventional pre-sloped mortar bed shower and need an ASTM D4068 membrane the inspector recognizes.

Yes. The 41584 liner is marked in 6 inch increments along the material, so you can measure and cut the pan size you need straight off the roll without pulling a tape across the whole sheet.

The part number is Oatey 41584, a black 40 mil CPE pan liner in a 6 ft by 33 ft roll. That is the number to quote for reorders so you get the full 33 ft roll length rather than a shorter cut.