Waterproofing & Crack Isolation Membrane

Protect your flooring and tile installations with our Waterproofing & Crack Isolation Membranes collection, designed for professional contractors and serious DIY projects. These membranes prevent moisture intrusion and accommodate substrate movement, helping to stop cracks, delamination, and water damage before they start.

This collection includes liquid-applied and sheet membranes used under tile, stone, vinyl, and hardwood flooring in bathrooms, showers, balconies, kitchens, laundry rooms, basements, and high-traffic commercial spaces. Many products provide both waterproofing and anti-fracture protection in one system, reducing installation steps and long-term failure risk.

Our waterproofing and crack isolation membranes are compatible with concrete, cement backer board, plywood, gypsum underlayment, and masonry substrates. They meet or exceed ANSI A118.10 (waterproofing) and ANSI A118.12 (crack isolation) standards, ensuring code-compliant performance for residential and commercial installations.

Whether you are installing tile in a wet area or protecting a floor from slab movement, these membranes deliver long-term moisture protection, flexibility, and structural reliability—essential for projects that demand durability and performance.