Schluter KERDI-KERECK Preformed Waterproofing Inside Corners, 2-Pk provides seamless, preformed waterproofing specifically designed for inside corners of KERDI, KERDI-BOARD, and DITRA assemblies. These preformed corners create a watertight seal that effectively prevents leaks and mold growth in tiled showers and other wet areas. With a 4-mil thickness, they minimize build-up in corners, ensuring a smooth and reliable waterproofing solution. Engineered for easy installation and compatibility with Schluter®-Shower System products, these inside corners work ly with KERDI membranes and boards to enhance the durability and waterproofing integrity of your shower or wet room installation. Model Number: KERECK/FI2