GURU® G-FLEX Uncoupling Membrane is a waterproof tile underlayment designed to support tile installations over demanding substrates. It provides uncoupling, decoupling, load distribution, vapor management, and waterproofing within a single membrane system.

Manufactured from high-density polyethylene with a raised circular pattern and a thermo-bonded polypropylene fiber backing, G-FLEX helps manage substrate movement and moisture vapor while maintaining consistent bond performance in heavy-duty applications.

Key Features

• Uncoupling and Decoupling Tile Underlayment: Helps isolate tile coverings from substrate movement on critical surfaces.
• Waterproofing Membrane: Acts as a continuous waterproof barrier when properly installed.
• Crack Isolation: Meets ANSI A118.12 requirements for crack isolation membranes.
• Vapor Management: Raised pattern supports vapor pressure compensation when moisture is present in the substrate.
• Load Distribution: Designed to help distribute point loads across the substrate.
• ANSI Compliant: Meets or exceeds ANSI A118.10 and ANSI A118.12 standards and is accepted by IAPMO.

Common Applications

• Commercial kitchens
• Food processing facilities
• Dairies and breweries
• Airport facilities
• Other heavy-duty tile installations

Specifications

Specification	Details
Membrane Thickness	1/8" (3 mm)
Core Material	High-Density Polyethylene (HDPE)
Backing Material	Thermo-bonded polypropylene fiber
Color	Red
Temperature Range	-22°F to +176°F

GURU® G-FLEX Uncoupling Membrane functions as a multi-purpose tile underlayment providing uncoupling, decoupling, waterproofing, crack isolation, and vapor management for tile assemblies requiring documented performance and standards compliance.