Name: MAPEI Mapelastic Aquadefense 1 Gallon(s) Liquid Indoor Waterproof Membrane
Brand: MAPEI
SKU: 5014036803
Price: 55.98 USD
Availability: InStock
Rating: 4.6 (497 reviews)

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AquaDefense 1 Gallon waterproofing membrane.

Barrier to protect adjacent rooms and floors below from water damage
Applied with a roller or brush on flat or curved surfaces
Quick drying; you are able to lay tile in 30-50 minutes
1 gallon bucket covers up to 60 sqft
Use to isolate in-plane cracks up to 1/8-in
Flood test ready in 12 hours
Mold and mildew resistant
Exceeds ANSI 118.10 specifications for waterproofing membranes and ANSI 118.12 specification for crack isolation membranes

General
Drying Time (Hours)	1	Unit of Measure	Gallon(s)
Use Location	Indoor or outdoor	Product Type	Liquid
Required Additional Components	None required	Surface Prep Type	Membrane
Package Quantity	1	Series Name	Mapelastic Aquadefense
Unit of Measure Quantity	1

Dimensions
Coverage Area (Sq. Feet)	60	Container Size	1-gallon

Features
Sold As	Bucket	Freeze Resistant Post Installation	Yes
Primer Required	No	Waterproof	Yes

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -

Warranty
Warranty	1-year limited

Compatibility
For Use on Laminate	No	Use Over Existing Sheet Vinyl	No
For Use Over Painted Floor	No	Use Over Concrete	Yes
For Use with Vinyl	No	For Use with Hardwood	No
For Use with Carpet	No	For Use Over Vinyl	No
For Use with Tile	Yes	For Use with Laminate	No
Use Over Cement Backer Board	Yes	For Use Over Tile	No
Use Over Exterior Grade Plywood	No

Miscellaneous
UNSPSC	31211500

Check out the Best Selling Surface Preparation on Lowes.com

Review

4.6 out of 5

497 Reviews

93% Recommend this product

Ratings may include incentivized customer reviews.

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+ 35

What Customers Are Saying

Customers overwhelmingly praise this waterproofing membrane for exceptional performance and ease of use in bathroom renovations. Most highlight its superior ability to prevent water damage and create a durable barrier behind tile, with many noting the helpful dark green-to-black color change when dry. Reviewers consistently describe application as straightforward using brush or roller, with quick 30-minute drying time and easy water cleanup. Several report strong durability with multiple coats, and many confirm one gallon covers a standard shower. A few note minor color inconsistencies or odor, but these rare concerns are vastly outweighed by widespread satisfaction and recommendation.

Customer review summary generated by AI, including incentivized reviews.

497 Customer Reviews

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Would Recommend

easy to use

bomacOctober 5, 2026
Verified Purchaser

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Easy to Apply and Great Coverage

Would Recommend

I used MAPEI AquaDefense for waterproofing during my bathroom renovation and was very happy with the product. It was easy to apply with both a roller and brush, adhered well to the surface, and provided good, even coverage. The coats dried relatively quickly, which made it easy to keep the project moving. Once cured, it created a solid waterproof membrane and gave me confidence before installing the tile. I would definitely use AquaDefense again for another bathroom or shower project.

Fab OSeptember 29, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/feb6bab8-63d4-56bb-9d0f-5b3e84b4c6c3

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Tough

It’s as tough as Redgard

TimboSeptember 23, 2026
Verified Purchaser

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Easy to apply and no fumes

Would Recommend

It was easy to apply, didn't have a noxious smell, and hopefully will last a long time. Only time will tell if it is as waterproof as it claims to be. But, I have high hopes for it.

GenericReviewerSeptember 14, 2026
Verified Purchaser

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Have not yet used

PamLSeptember 9, 2026
Verified Purchaser

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Easy application

Would Recommend

Easy to apply with great coverage

Mka38654September 4, 2026
Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/85c8f8a7-c781-5758-bf84-6cf93964e517

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		Name	Current Item MAPEIMapelastic Aquadefense 1 Gallon(s) Liquid Indoor Waterproof Membrane
		Ratings	497
		Use Location	Indoor or outdoor
		Use Over Concrete
		Waterproof
Schluter SystemsPrimer-PS 1 Gallon(s) Liquid Indoor Primer	Henry44 Pound(s) Indoor Waterproof Self-leveling underlayment	Schluter SystemsPrimer-U 1 Gallon(s) Liquid Indoor Primer	MAPEIPrimer L 5 Gallon(s) Liquid Indoor Primer
4	8	1
Indoor	Indoor	Indoor	Indoor