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HYDRO-BLOK Uncoupling Membrane
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At a Glance
Quick Decision Guide
Thickness
1/8"
Roll Size
36" Ć 100'
Coverage
300 Sq Ft
Material
HDPE
Functions
Uncoupling, Crack Isolation & Waterproofing
Tile Types
Ceramic, Porcelain & Natural Stone
Compatible Substrates
Concrete, Wood & Existing Tile
Installation
No Reinforcing Mats Required
Why Choose This Product
Key Benefits
Uncoupling Protection
Separates tile assemblies from substrate movement
Crack Isolation
Helps reduce crack transfer into tile installations
Waterproof Layer
Protects substrates beneath finished tile
HDPE Construction
Durable high-density polyethylene membrane
Broad Compatibility
Installs over concrete, wood and existing tile
Simplified Installation
No reinforcing mats required
Product Information
Product Details
Specifications
Brand
HYDRO-BLOKĀ®
Part Number
HBUNCOUP18
Product Type
Uncoupling Membrane
Coverage
300 Sq Ft
Roll Size
36" Ć 100'
Thickness
1/8"
Material
High-Density Polyethylene (HDPE)
Primary Function
Tile Uncoupling Underlayment
Secondary Functions
Crack Isolation & Waterproofing
Tile Compatibility
Ceramic, Porcelain & Natural Stone
Compatible Substrates
Concrete, Wood Subfloors & Existing Tile
Waterproof Layer
Yes
Crack Isolation
Yes
Uncoupling Layer
Yes
Reinforcing Mats Required
No
Application
Residential & Commercial Tile Installations
About This Product
Tile Underlayment for Uncoupling, Crack Isolation and Waterproofing
HYDRO-BLOKĀ® Uncoupling Membrane is a high-performance tile underlayment designed to separate tile assemblies from substrate movement while providing crack isolation and waterproofing beneath the finished tile surface. The membrane helps protect tile installations from substrate stresses that can lead to cracked grout joints or tile failure.
Compatible with Common Tile Substrates
Manufactured from high-density polyethylene (HDPE), the membrane installs over concrete, wood subfloors, and existing tile surfaces. It provides a stable foundation for ceramic, porcelain, and natural stone tile in both residential and commercial applications.
Waterproof Protection Beneath Tile Installations
In addition to uncoupling and crack isolation, the membrane creates a waterproof layer beneath the tile assembly to help protect the substrate from moisture intrusion. Its integrated design eliminates the need for additional reinforcing mats, simplifying installation while maintaining reliable performance.
Available in Two Thicknesses
HYDRO-BLOK Uncoupling Membrane is available in 1/8" and 1/4" thicknesses with both sizes supplied in 36" Ć 100' rolls covering up to 300 square feet. Choose the thickness that best matches the installation requirements while maintaining the same waterproofing and uncoupling performance.
Common Questions
Frequently Asked Questions
What is HYDRO-BLOK Uncoupling Membrane used for?
It is installed beneath tile to provide uncoupling, crack isolation, and waterproofing between the tile assembly and the substrate.
What types of tile can be installed over the membrane?
The membrane is compatible with ceramic, porcelain, and natural stone tile installations.
Which substrates are compatible with HYDRO-BLOK Uncoupling Membrane?
It can be installed over concrete, wood subfloors, and existing tile surfaces.
Is the membrane waterproof?
Yes. It creates a waterproof layer beneath the finished tile installation while also providing uncoupling and crack isolation.
What thicknesses are available?
The membrane is available in 1/8" and 1/4" thicknesses.
How much area does each roll cover?
Each 36" Ć 100' roll provides approximately 300 square feet of coverage.
Do I need reinforcing mats with this membrane?
No. HYDRO-BLOK states that additional reinforcing mats are not required.
Can this membrane be used in residential and commercial projects?
Yes. It is designed for both residential and commercial tile installations.