Bostik 1 Gallon GoldPlus Latex Waterproofing and Anti-Fracture Membrane, $59.99 USD/Box, LL Flooring (Lumber Liquidators)

Bostik GoldPlus is a ready-to-use latex membrane designed for waterproofing and preventing fractures beneath thin set ceramic tile installations on both vertical and horizontal areas. It helps prevent tile cracking caused by concrete slab shrinkage and blocks cracks up to 1/8 inch from affecting tile or stone. Use it to waterproof showers, lavatories, fountains, and commercial spaces like kitchens and restaurants. Benefits include easy roller application, quick one-hour drying time, and a 24-hour flood test for faster installation. Contains Blockade Antimicrobial Protection and complies with LEED standards with low odor and low VOC. Meets and exceeds ANSI A118.10 and A118.12 specifications for waterproofing and crack isolation.