At a Glance

Drying Time : 24 (hr)

Mix With : Water

Use Outdoor

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MAPEI UltraFlex 1 Gray Thinset Tile Mortar ( 50 Pound(s) )

Name: MAPEI UltraFlex 1 Gray Thinset Tile Mortar ( 50 Pound(s) )
Brand: MAPEI
SKU: 5014029393
Rating: 4.7 (674 reviews)

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4.7

674

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Color/Finish Family: Gray

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

Dimensions
Maximum Coverage Area (Sq. Feet)	90

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

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	No
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	No
Use Over Cement Backer Board	Yes	For Use with Shower Floors	No
For Use with Pools	No	For Use with Bathroom Walls	Yes
Use Over Exterior Grade Plywood	No	For Use with Large Format Tile	No
Use Over Concrete	Yes

Miscellaneous
UNSPSC	30111500

Check out the Best Selling Mortar on Lowes.com

Review

4.7 out of 5

674 Reviews

95% Recommend this product

Ratings may include incentivized customer reviews.

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+ 28

What Customers Are Saying

Customers overwhelmingly praise this thinset mortar for exceptional bonding strength, reliable performance, and ease of use across diverse tile projects. Most highlight its strong adhesion on walls, floors, and challenging surfaces, with excellent results on large-format tiles, porcelain, glass, and marble. Reviewers consistently note the user-friendly mixing and application process, extended workable time for adjustments, and simple cleanup. Many appreciate the white color for preventing gray show-through with light tiles. A few mention quick setting requires fast work and cleanup demands effort, though these minor concerns rarely diminish overall satisfaction. Most consider it a dependable, high-performing choice for professionals and DIYers alike.

Customer review summary generated by AI, including incentivized reviews.

674 Customer Reviews

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Good quality

DaveOctober 2, 2026
Verified Purchaser

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more expensive doesn't mean better this is a good

Would Recommend

I picked this up for a friend of mine please is like more expensive the better he's very impressed with the workability and a coverage he was glad I picked it up for him he's going to use it more often now good product

danoSeptember 25, 2026
From UltraFlex 1 White Thinset Tile Mortar ( 50 Pound(s) ) Verified Purchaser

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Would Recommend

Product worked well

Ty26September 24, 2026
From UltraFlex 1 White Thinset Tile Mortar ( 50 Pound(s) ) Verified Purchaser

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		Name	Current Item MAPEIUltraFlex 1 Gray Thinset Tile Mortar ( 50 Pound(s) )
		Ratings	674
		Type	Thinset
		Rapid Setting
		For Use with Kitchen Backsplashes
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