Outside corners — where two wall planes meet facing outward — are tricky to waterproof cleanly with flat membrane. The KERDI-KERECK outside corner takes the guesswork out: it's a preformed, seamless piece that sets perfectly every time.

Made from the same KERDI waterproofing membrane material, these one-piece corners bond directly into your thin-set layer and provide a continuous, leak-proof seal at outside corner transitions. Compatible with KERDI, KERDI-BOARD, and DITRA shower assemblies.

Pro Tip: Use inside and outside corners together as a set — buying both upfront means you won't be back-ordering mid-install. For a standard walk-in shower conversion, you'll typically need 2–4 inside corners and 2 outside corners depending on the layout. Grab extras now; they're cheap insurance on a tile job you don't want to redo.

Pack includes 2 outside corners.