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At a Glance
Why Choose This Product
Creates a bonded waterproof barrier beneath tile
Meets ANSI A118.12 crack isolation requirements
Low perm construction for steam and wet environments
Available in precut sheets and rolls for projects of all sizes
Approved for both residential and commercial installations
Meets ANSI A118.10 and IAPMO requirements
Product Information
GURUĀ® Water-Stop Waterproofing Membrane is a bonded sheet membrane designed for waterproofing and crack isolation beneath ceramic tile and natural stone installations. It complies with ANSI A118.10 waterproofing and ANSI A118.12 crack isolation standards while providing a durable waterproof barrier beneath finished tile surfaces.
The 20 mil multi-layer membrane is suitable for residential and commercial waterproofing applications including showers, steam showers, wet areas, walls, and floors. Its low perm construction helps manage moisture and vapor while protecting the tile assembly from water intrusion.
Water-Stop Waterproofing Membrane is available in multiple precut sheet and roll sizes to accommodate projects ranging from shower installations to large commercial floor and wall applications. Every size provides the same 20 mil construction, ANSI compliance, and waterproofing performance.
Product Resources
Common Questions
The membrane meets ANSI A118.10 for waterproofing and ANSI A118.12 for crack isolation.
Yes. The 20 mil low perm membrane is suitable for steam showers and other wet environments.
It is designed for showers, steam showers, wet areas, walls, and floors beneath ceramic tile and natural stone.
Yes. It is IAPMO accepted for both residential and commercial applications.
All Water-Stop membrane sizes feature a 20 mil multi-layer construction.
