GURU Water-Stop Waterproofing Membrane is a bonded sheet waterproofing membrane designed for shower waterproofing, tile waterproofing, and crack isolation in tiled wall and floor assemblies. It meets and exceeds ANSI A118.10 (IAPMO File 9205) and ANSI A118.12 (IAPMO File 9990) requirements and is accepted by IAPMO.

Constructed as a highly flexible, low-perm, multi-layer steam barrier, this waterproofing membrane is 20 mil thick and installed beneath ceramic and natural stone tile coverings. It provides moisture protection and in-plane crack isolation in interior and exterior installations for new construction and renovation projects.

Key Features

• Waterproofing and Crack Isolation: Provides moisture containment and anti-fracture protection beneath tile.
• ANSI-Compliant Performance: Meets and exceeds ANSI A118.10 and ANSI A118.12 standards.
• Low Perm Rating: Suitable for steam shower applications.
• Multi-Layer Sheet Construction: Designed for flexibility and bonded installation under tile.
• Interior and Exterior Use: Approved for wall and floor applications.

Applications

• Shower walls
• Tub surrounds
• Bathrooms
• Steam showers
• Commercial kitchens
• Residential kitchens

Available Sizes

Part Number	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
IFU5300	6’ 7” x 65’ 7” (430 sq. ft.)	20 mil

This bonded sheet waterproofing membrane delivers waterproofing, crack isolation, and low-perm vapor control for residential and commercial tile installations.