Inside corners in a tiled shower are one of the most common places leaks start. Cutting and overlapping flat KERDI membrane in a tight inside corner takes skill and time — one of these preformed KERDI-KERECK corners does it in seconds and eliminates the risk entirely.

Each KERDI-KERECK is a one-piece, seamless corner made from the same KERDI membrane material, already formed to the exact 90° inside angle. Just embed it in thin-set right where the walls meet the floor and move on.

Pro Tip: These work with KERDI, KERDI-BOARD, and DITRA assemblies — so they're the right call whether you're waterproofing a traditional mortar-bed shower or a KERDI-BOARD build. Inside corners see constant movement from thermal cycling; a preformed corner handles that stress better than a hand-cut overlap. Don't skip these to save a few bucks.

Pack includes 2 inside corners.