Can this be used to water proof a leak on existing shower tile?

No. This product is for waterproofing the substrate behind the tile. You may need to peel off the tile to get to the substrate. But it seems you need to find the source of the leak first then use this product as part of the repair.

I used the mesh tape for Durock and went over all joints with the mortar mix I planned to use installing my tiles. Let the mortar dry completely. Then, just follow the directions on the bucket. I tackled a shower surround with two large niches for my first tile job. This bucket was plenty for two coats on everything as well as a section on the floor in front of the shower. Great product and easy to use. Be sure to follow the directions carefully.

I have cement subfloor in my shower . Can I use this instead of a shower pan liner?

Hi, A liner would be preferable, but this membrane will work too, assuming the concrete is stable, there is a natural slope to the drain and there are no breaches. If you use a Durock shower installation kit it adds a natural slope to a center drain installation. That would be preferable then use the Durock membrane over the top before using mastic and tiling.

Is this like flex seal liquid?

If you are referring to the “flex seal brand” sealer that is on the market it doesn’t compare.This liquid waterproof membrane is like a very thick paint that goes on smooth with roller or brush.this is a very good product that I have used on several occasions..... it provides excellent waterproofing qualities if used as directed p,usually two coats will do the trick.

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USG DUROCK Brand Liquid Waterproofing Membrane 1 Gallon

Product ID: 58566986

Details

Brand
USG Interiors
Item Weight
0.27 g
Material
Acrylic
Style
Compact
Water Resistance Level
Waterproof

💧Low perm rating 0.38 perms

🕒Fast drying time

🛡️Anti-fracture protection 3mm

R4605

Duties & taxes included

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Seal the deal with USG Durock—where waterproofing meets pro efficiency!

MULTI SURFACE MASTERY - Seamlessly waterproof floors, walls, countertops, and even steam showers.
SUPERIOR CRACK DEFENSE - Anti-fracture protection up to 1/8 inch shields against shrinkage cracks.
SPEEDY PROJECT TURNAROUND - Fast drying formula means less downtime and faster completion.
RAPID APPLICATION VERSATILITY - Roll, brush, trowel, or spray—adapt to your workflow effortlessly.
INDUSTRY LEADING VAPOR BARRIER - Low permeance rating ensures top-tier moisture resistance per ASTM E96.

USG Durock Liquid Waterproofing Membrane is a versatile, fast-drying acrylic polymer solution designed for professional-grade waterproofing and crack isolation. Suitable for multiple substrates including concrete, masonry, and cement backerboard, it offers anti-fracture protection up to 3mm and a low vapor permeance rating of 0.38 perms, making it ideal for residential and commercial wet areas, including steam showers, floors, walls, and countertops.

Specifications

ASIN	B076YF45P3
Best Sellers Rank	#262,152 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #812 in Hardware Sealers
Brand Name	USG Interiors
Color	clear
Compatible Material	Concrete, Polyvinyl Chloride, Stainless Steel, Stone
Customer Reviews	4.5 4.5 out of 5 stars (732)
Item Form	Liquid
Item Weight	0.27 g
Manufacturer	USG
Material Type	Acrylic
Number of Items	1
Number of Packs	1
Style Name	Compact
Supported Standards	ASTM E96
Surface Recommendation	Tile
UPC	081099039591 617070860771
Unit Count	128 Fluid Ounces
Water Resistance Level	Waterproof

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