Pre-Formed Waterproofing Corners for Tile Installations The GoBoard® Corner is a pre-formed waterproofing accessory designed to seal 90° inside and outside corner transitions in showers, steam rooms, and other wet-area tile installations. Its integrated waterproof membrane helps maintain a continuous waterproof barrier at change-of-plane areas without requiring field fabrication. Fast Installation with Thin-Set Mortar The pre-formed design eliminates the need to cut and fold waterproofing membrane, helping speed installation while creating consistent corner seals. The corners install using either modified or unmodified thin-set mortar and integrate with GoBoard® waterproofing systems. Durable Waterproof Construction Constructed from polypropylene non-woven fabric with an integrated waterproof membrane, the GoBoard® Corner is suitable for showers, steam rooms, and other wet environments. Each package includes two pre-formed waterproofing corners and meets ANSI A118.10 waterproofing requirements along with ASTM E96 and ASTM C627 Extra Heavy performance standards.
