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Waterproofing & Uncoupling

Waterproofing & Uncoupling Membranes for Tile Installations

Waterproofing and uncoupling membranes are installed beneath tile to help manage moisture, isolate cracks, and reduce stress caused by substrate movement. This collection includes waterproofing membranes, uncoupling membranes, crack isolation membranes, shower pan liners, flashing tapes, waterproofing bands, sealants, pipe seals, and shower waterproofing accessories used for floors, walls, showers, bathrooms, and other wet-area tile installations.

GoBoard

GoBoard Pro Sealant

Moisture-Curing Waterproof Joint Sealant and Building Adhesive
Original price $10.56 - Original price $16.26
Original price
$10.56 - $16.26
$10.56 - $16.26
Current price $10.56
10.3oz | $1.03 / oz
In Stock
GURU USA

GURU W-S Peel & Stick Waterproofing Band

Self-Adhesive Waterproofing Seam Tape for W-S Board Joints
Original price $121.16 - Original price $121.16
Original price
$121.16
$121.16 - $121.16
Current price $121.16
In Stock
Hydro-Blok

HYDRO-BLOK Joint Sealant

Polyurethane Sealant for Waterproof Seams, Joints & Transitions
Original price $0.00 - Original price $0.00
Original price $0.00
$13.75 - $23.96
$13.75 - $23.96
Current price $13.75
In Stock
GoBoard

GoBoard Shower Mixing Valve Seal - 4-1/2"

Preformed Waterproofing Seal for 4-1/2" Shower Valve Openings
Original price $12.00 - Original price $12.00
Original price
$12.00
$12.00 - $12.00
Current price $12.00
In Stock
GURU USA

GURU W-S Waterproof Sealant and Adhesive

MS Polymer Sealant and Adhesive for Waterproofing
Original price $16.83 - Original price $16.83
Original price
$16.83
$16.83 - $16.83
Current price $16.83
In Stock
GoBoard

GoBoard Waterproof Pipe Collar - 1/2" to 3/4"

Preformed Waterproof Pipe Seal for 1/2" to 3/4" Penetrations
Original price $9.49 - Original price $9.49
Original price
$9.49
$9.49 - $9.49
Current price $9.49
In Stock
GURU USA

GURU Water-Stop Corners

Pre-Formed Shower Waterproofing Corners for 90° Transitions
Original price $15.08 - Original price $15.22
Original price
$15.08 - $15.22
$15.08 - $15.22
Current price $15.08
In Stock
Alpha

Alpha Nichigo G-Tape 3040 Series Acrylic Flashing Tape

All-Weather Flashing Tape with Permanent Acrylic Adhesion
Original price $20.02 - Original price $98.96
Original price $20.02
$20.02 - $98.96
$20.02 - $98.96
Current price $20.02
In Stock
USG

USG Durock Liquid Waterproofing & Crack Isolation Membrane

Liquid Waterproofing, Vapor Retarder & 1/8" Crack Isolation Membrane
Original price $40.00 - Original price $100.00
Original price
$40.00 - $100.00
$40.00 - $100.00
Current price $40.00
In Stock
Wedi

wedi Joint Sealant

Waterproof Flexible Sealant and Construction Adhesive
Original price $0.00 - Original price $0.00
Original price $0.00
$21.06 - $31.59
$21.06 - $31.59
Current price $21.06
In Stock
GURU USA

GURU W-S Patch Peel & Stick

Self-Adhesive 4" × 4" Waterproofing Patches for W-S Board
Original price $49.98 - Original price $49.98
Original price
$49.98
$49.98 - $49.98
Current price $49.98
In Stock
Hydro-Blok

HYDRO-BLOK Pipe Seal

Waterproof Pipe Collar for 3/4" Shower and Tub Plumbing
Original price $0.00 - Original price $0.00
Original price $0.00
$11.04
$11.04 - $11.04
Current price $11.04
In Stock
GURU USA

GURU G-FLEX Waterproof Uncoupling Membrane

Waterproof Tile Underlayment for Crack Isolation and Vapor Management
Original price $38.18 - Original price $536.85
Original price
$38.18 - $536.85
$38.18 - $536.85
Current price $38.18
In Stock
GoBoard

GoBoard Waterproof Seam Tape - 4.9" x 33.8'

Waterproofing Band for GoBoard Seams, Joints and Transitions
Original price $31.90 - Original price $31.90
Original price
$31.90
$31.90 - $31.90
Current price $31.90
In Stock
GURU USA

GURU W-S Waterproof Pipe Seal - 3/4"

3/4" Waterproof Pipe Collar for Tiled Shower Walls
Original price $7.62 - Original price $7.62
Original price
$7.62
$7.62 - $7.62
Current price $7.62
In Stock
GURU USA

GURU W-S Waterproofing Band for Seams & Transitions

20 Mil Waterproofing Seam Tape for Joints and Transitions
Original price $54.59 - Original price $153.93
Original price
$54.59 - $153.93
$54.59 - $153.93
Current price $54.59
In Stock
Hydro-Blok

HYDRO-BLOK Mixing Valve Seal

Waterproof Seal for 4-1/2" Shower Mixing Valve Openings
Original price $0.00 - Original price $0.00
Original price $0.00
$15.46
$15.46 - $15.46
Current price $15.46
In Stock
GURU USA

GURU W-S Mixing Valve Seal

Waterproof Seal for Shower Mixing Valve Penetrations
Original price $9.58 - Original price $9.58
Original price
$9.58
$9.58 - $9.58
Current price $9.58
In Stock
Alpha

Alpha Nichigo G-Tape 3045 Series Self-Adhering Flashing Tape

Low-Surface-Energy Flashing Tape for Rubber Seaming
Original price $23.88 - Original price $102.58
Original price $23.88
$23.88 - $102.58
$23.88 - $102.58
Current price $23.88
In Stock
Alpha

Alpha Nichigo G-Tape 3035 Series Linerless Flashing Tape

Linerless Self-Adhering Flashing for Windows and Decks
Original price $20.02 - Original price $32.60
Original price $20.02
$20.02 - $32.60
$20.02 - $32.60
Current price $20.02
Only 2 Left
GoBoard

GoBoard Waterproofing Corner for Showers - 2 Pack

Cut-to-Fit Waterproofing Corners for Showers and Wet Areas
Original price $14.42 - Original price $14.42
Original price
$14.42
$14.42 - $14.42
Current price $14.42
In Stock
Wedi

wedi Sealant 620

Vapor-Tight SMP Hybrid Sealant for wedi Subliner Dry Assemblies
Original price $0.00 - Original price $0.00
Original price $0.00
$32.60 - $45.44
$32.60 - $45.44
Current price $32.60
Out of Stock
Wedi

wedi Pipe Seal

Flexible Waterproof Seal for 1/2" to 3/4" Pipe Protrusions
Original price $0.00 - Original price $0.00
Original price $0.00
$13.56
$13.56 - $13.56
Current price $13.56
In Stock
GURU USA

GURU Water-Stop Waterproofing Membrane

20 Mil Waterproofing Sheet for Showers, Wet Rooms, Walls and Floors
Original price $64.81 - Original price $684.69
Original price
$64.81 - $684.69
$64.81 - $684.69
Current price $64.81
In Stock
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Waterproofing & Uncoupling Membranes for Tile & Shower Installations

Waterproofing and uncoupling membranes are installed beneath tile assemblies to help manage moisture, isolate substrate cracks, and reduce movement transfer between the substrate and finished tile surface. These systems are commonly used in showers, bathrooms, kitchens, laundry rooms, balconies, and other tile installations where moisture protection and crack prevention are important.

This collection includes waterproofing membranes, uncoupling membranes, crack isolation membranes, liquid waterproofing products, shower pan liners, flashing tapes, waterproofing bands, pipe seals, mixing valve seals, drain flashing components, and waterproofing accessories designed for residential and commercial tile installations.

Types of Waterproofing & Uncoupling Systems

  • Waterproofing Membranes: Installed beneath tile to help prevent moisture from reaching the substrate.
  • Uncoupling Membranes: Designed to reduce stress transfer from substrate movement into the tile assembly.
  • Crack Isolation Membranes: Help bridge minor substrate cracks and reduce the risk of tile and grout cracking.
  • Shower Pan Liners: Used to create waterproof shower floor assemblies beneath mortar beds and tile.
  • Waterproofing Tapes, Bands & Seals: Used to seal seams, corners, plumbing penetrations, and transitions within waterproofing systems.

Waterproofing for Showers & Wet Areas

Shower waterproofing systems commonly use membranes, waterproofing bands, inside and outside corners, pipe seals, mixing valve seals, drain flashing, and compatible sealants to create continuous moisture protection behind tile surfaces.

Uncoupling Membranes for Floors

Uncoupling membranes are frequently installed over concrete slabs, plywood subfloors, radiant heat systems, and other substrates where movement, expansion, or shrinkage could transfer stress into the tile installation.

Selecting the Right Waterproofing Membrane

Selecting the correct membrane depends on moisture exposure, substrate conditions, crack isolation requirements, radiant heat compatibility, installation location, and the type of tile assembly being constructed.

Frequently Asked Questions

What is the difference between a waterproofing membrane and an uncoupling membrane?
Waterproofing membranes are designed to block moisture, while uncoupling membranes are designed to reduce stress transfer from substrate movement into the tile assembly. Some products provide both functions.
When should a waterproofing membrane be installed under tile?
Waterproofing membranes are commonly installed in showers, bathrooms, laundry rooms, balconies, and other areas where moisture exposure is expected.
What does an uncoupling membrane do?
Uncoupling membranes help separate the tile assembly from minor substrate movement, reducing the risk of cracked tile and grout caused by expansion, contraction, or settling.
Can tile be installed directly over waterproofing membranes?
Most waterproofing membranes are designed to receive tile when installed with compatible thin-set mortar and according to manufacturer requirements.
Are waterproofing membranes required in showers?
Building codes and installation standards commonly require shower assemblies to include waterproofing systems that protect the structure from moisture intrusion.