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GURU Water-Stop Waterproofing Membrane

GURU W-S Membrane is a professional waterproofing membrane designed for showers, steam showers, and other wet areas. It provides a durable, watertight barrier that prevents leaks, mold, and structural damage while remaining flexible and easy to install. Trusted by tile installers and contractors, this membrane delivers long-lasting performance and superior protection for both residential and commercial projects.

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Original price $120.72 - Original price $631.61
Original price $120.72
$102.61
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Current price $102.61
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Description

GURU Water-Stop Membrane is a professional-grade waterproofing membrane designed for tile installers and contractors to ensure effective shower waterproofing. This high-quality tile waterproofing membrane delivers superior protection against moisture infiltration, making it ideal for use in residential and commercial shower systems, steam showers, and wet areas.

Key Features of GURU Water-Stop Shower Waterproofing Membrane

  • Certified Quality: Meets ANSI A118.10 and ANSI A118.12 standards; IAPMO accepted for reliable performance.
  • Highly Flexible & Durable: 20 mil thick multilayer membrane offers crack isolation and long-lasting waterproofing.
  • Versatile Application: Suitable for interior and exterior walls and floors, including showers, tub surrounds, kitchens, balconies, and more.
  • Easy Installation: Designed for quick application with modified thin-set mortar compatible with tile and stone surfaces.
  • Water-Stop Technology: Provides a watertight barrier that prevents leaks, mold, and structural damage in wet areas.
  • Steam Shower Compatible: Low perm rating makes it ideal for steam shower waterproofing applications.

Specifications

Specification Details
Thickness 20 mil
Certifications ANSI A118.10, ANSI A118.12, IAPMO
Compatible Substrates Concrete, masonry, cement mortar beds, gypsum wallboard, exterior plywood, cement backer board, ceramic tile & stone, fiber-cement, terrazzo
Application Shower walls, tub surrounds, steam showers, kitchens, balconies, pool areas

GURU W-S Membrane Sizes

Part No. Size Thickness
IFU5100 3’ 3” x 16’ 5” (54 Sq. Ft.) 20 Mil
IFU5113 3’ 3” x 32’ 10” (108 Sq. Ft.) 20 Mil
IFU5200 3’ 3” x 98’ 5” (323 Sq. Ft.) 20 Mil

Usage Tips for Optimal Shower Waterproofing

  • Apply GURU Water-Stop membrane over clean, sound substrates using a modified thin-set mortar compliant with ANSI A118.4 or equivalent standards.
  • Ensure seams and corners are properly sealed with compatible waterproofing tape or accessories.
  • Use in combination with GURU waterproofing productsÂź for a complete, trusted shower waterproofing membrane system.
  • Follow manufacturer guidelines carefully to maximize crack isolation and moisture protection.

Protect your installations with the trusted GURU Water-Stop Shower Waterproofing Membrane. Order now to ensure superior, long-lasting waterproofing performance on your next project.


Guru Waterproofing Products

Frequently Asked Questions

What is GURU W-S Membrane used for?
GURU W-S Membrane is used for waterproofing showers, steam showers, tub surrounds, and other wet areas. It provides a durable, watertight barrier to prevent leaks, mold, and structural damage in both residential and commercial projects.
What size is GURU W-S Membrane roll?
GURU W-S Membrane roll comes in three size options: 3’ 3” x 16’ 5” (54 sq. ft.), 3’ 3” x 32’ 10” (108 sq. ft.), or 3’ 3” x 98’ 5” (323 sq. ft.). Each roll is 20 mil thick for professional shower waterproofing applications.
Can GURU W-S Membrane be used in steam showers?
Yes, GURU W-S Membrane is steam shower compatible due to its low perm rating. It maintains effective waterproofing and crack isolation even in high-humidity conditions, ensuring long-lasting protection.
What substrates are compatible with GURU W-S Membrane?
GURU W-S Membrane can be applied over concrete, masonry, cement mortar beds, gypsum wallboard, exterior plywood, cement backer board, and tile or stone surfaces. Proper seam sealing and compatible thin-set mortar ensure reliable, long-term waterproofing.
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