At a Glance

Drying Time : 24 (hr)

Mix With : Water

Use With Large Format Tile

Ask Mylow

Mylow is an AI virtual assistant.

More Information

Can I use this for pool areas?How do I mix this mortar?What is the warranty period?Will this work on bathroom walls?How many square feet does one bag cover?

MAPEI Uncoupling Membrane Gray Thinset/Medium bed Tile Mortar ( 50 Pound(s) )

Name: MAPEI Uncoupling Membrane Gray Thinset/Medium bed Tile Mortar ( 50 Pound(s) )
Brand: MAPEI
SKU: 5015187669
Price: 21.98 USD
Availability: InStock
Rating: 4.7 (128 reviews)

Shop MAPEI

4.7

128

Pickup

Unavailable

Shipping

Unavailable

Delivery

Sat, Oct 3

44 available

Stepper number input field with increment and decrement buttons

Members save more.

Here are some similar items...

MAPEILarge-Format Floor and Wall White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )

527

MAPEIUltraFlex 1 White Thinset Tile Mortar ( 50 Pound(s) )

670

MAPEIPolymer Additive White Latex additive Tile Mortar ( 2 Gallon(s) )

MAPEIKeraflex SG White Thinset/Medium bed Tile Mortar ( 44 Pound(s) )

114

MAPEIUltraFlex LFT Rapid White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )

MAPEIGlass Block White Glass block Tile Mortar ( 50 Pound(s) )

MAPEIKeraflex Plus White Thinset/Medium bed Tile Mortar ( 44 Pound(s) )

257

MAPEIKeraflex SG Gray Thinset/Medium bed Tile Mortar ( 44 Pound(s) )

114

MAPEIMosaic and Glass Tile White Thinset Tile Mortar ( 10 Pound(s) )

184

MAPEIFloor Tile Gray Thinset Tile Mortar ( 50 Pound(s) )

542

MAPEIUltraFlex 1 Gray Thinset Tile Mortar ( 50 Pound(s) )

670

MAPEILarge Tile and Stone White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )

279

MAPEIRapid Setting Gray Thinset Tile Mortar ( 50 Pound(s) )

224

MAPEIPorcelain Gray Thinset Tile Mortar ( 50 Pound(s) )

466

MAPEIKeraflex Plus Gray Thinset/Medium bed Tile Mortar ( 44 Pound(s) )

257

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Price Guarantee

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

Return Policy

FREE Shipping

Delivery is on us for orders over $45. Some exclusions apply.

Shipping Details

Use as a medium-bed or thin-set mortar for installing tile and select natural stone on floors and walls
For use with uncoupling membranes
Mix with water - no additive required
Can be mixed with MAPEI's Polymer Additive (instead of water) for enhanced performance, and for setting a wider range of tile and stone over additional substrates
Can be used for large format tile and stone (15-in and greater) when used with an uncoupling membrane or when mixed with Polymer Additive (13956) instead of water
Excellent for wet areas (including pools and showers) when mixed with MAPEI's Polymer Additive (#13956)
Unmodified mortar

General
Color/Finish Family	Gray	Unit of Measure Quantity	50
Type	Thinset/Medium bed	Manufacturer Color/Finish	Gray
Drying Time (Hours)	24	Unit of Measure	Pound(s)
Use Location	Indoor/Outdoor	Product Type	Powder
Required Additional Components	Water	Series Name	Uncoupling Membrane
Package Quantity	1

Dimensions
Tile Size	Any side greater than 15-in	Maximum Coverage Area (Sq. Feet)	95

Features
Sold As	Bag	Freeze Resistant Post Installation	Yes
Rapid Setting	No	Unmodified	Yes

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

Warranty
Warranty	1-year limited

Compatibility
For Use with Fireplace Exteriors	No	For Use with Porcelain	Yes
For Use with Ceramic	Yes	For Use with Kitchen Backsplashes	Yes
For Use with Stone	Yes	For Use with Vinyl Floors	Yes
For Use with Glass	No	For Use with Kitchen Counters	Yes
For Use with Garage Floors	Yes	For Use with Waterproofing	Yes
For Use with Garage Walls	Yes	For Use with Bathroom Floors	Yes
For Use with Patios	Yes	For Use with Shower Walls	Yes
Use Over Cement Backer Board	Yes	For Use with Shower Floors	Yes
For Use with Pools	Yes	For Use with Bathroom Walls	Yes
Use Over Exterior Grade Plywood	Yes (no additive required)	For Use with Large Format Tile	Yes
Use Over Concrete	Yes

Miscellaneous
UNSPSC	30111500

Check out the Best Selling Mortar on Lowes.com

Review

4.7 out of 5

128 Reviews

92% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

+ 1

What Customers Are Saying

The thinset provides strong adhesion and works well with uncoupling membranes. It is easy to mix and apply, though some users note it can set up quickly. While a few had issues with adhesion, most reviewers are satisfied with the product's performance and value.

Customer review summary generated by AI, including incentivized reviews.

128 Customer Reviews

Sort By

Does the trick

Would Recommend

This worked great

AKRemodelJuly 8, 2026
Verified Purchaser

Was this Review Helpful ?

A great product

Would Recommend

Went on smooth

Nobody94June 23, 2026
Verified Purchaser

Was this Review Helpful ?

easy

Would Recommend

good

notbuyingagainJune 3, 2026
Verified Purchaser

Was this Review Helpful ?

Easy to mix on your own!

Would Recommend

Used with uncoupling membrane. Worked well and was easy to mix

CedarLnMay 4, 2026
Verified Purchaser

Was this Review Helpful ?

Mortor

Would Recommend

I love this product.. not expensive and really worth the money

GinaMay 1, 2026
Verified Purchaser

Was this Review Helpful ?

Page 1 Page 2 Page 3 Page 10

17 Questions

Read All Q&A

Sort By

MAPEI: Featured Videos

COMPARE PRODUCTS

		Name	Current Item MAPEIUncoupling Membrane Gray Thinset/Medium bed Tile Mortar ( 50 Pound(s) )
		Ratings	128
		Type	Thinset/Medium bed
		For Use with Kitchen Backsplashes
		For Use with Shower Floors
MAPEIMosaic and Glass Tile White Thinset Tile Mortar ( 10 Pound(s) )	MAPEILarge-Format Floor and Wall White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )	Schluter SystemsAll-Set White Thinset Tile Mortar ( 50 Pound(s) )	MAPEIKeraflex Plus White Thinset/Medium bed Tile Mortar ( 44 Pound(s) )	MAPEIUltraFlex LFT Rapid White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )	MAPEILarge Tile and Stone White Thinset/Medium bed Tile Mortar ( 50 Pound(s) )	MAPEIKeraflex Plus Gray Thinset/Medium bed Tile Mortar ( 44 Pound(s) )	MAPEIPolymer Additive White Latex additive Tile Mortar ( 2 Gallon(s) )	MAPEIUltralite Pro White Thinset/Medium bed Tile Mortar ( 25 Pound(s) )
184	527	350	257	78	279	257	95	30
Thinset	Thinset/Medium bed	Thinset	Thinset/Medium bed	Thinset/Medium bed	Thinset/Medium bed	Thinset/Medium bed	Latex additive	Thinset/Medium bed