Model # AMA2

Internet #100034962

Store SKU #738174

Store SO SKU #1001490988

Custom Building Products 2.5 Gal. Thin-Set Mortar Admix

Custom Building Products

2.5 Gal. Thin-Set Mortar Admix

  • Increases bond strength and performance
  • Improves water resistance
  • Use in place of water for hard to bond surfaces
$2197 /each

Frequently Bought Together

Product Overview

This Custom Building Products 2.5 Gal. Acrylic Mortar Admix (AMA) is a liquid polymer designed to be mixed with custom or standard thin set mortar blends in place of water to improve performance and bond strength. For convenience, the admixture comes in a pre-measured container for ease of mixing. Increases performance of unmodified thin set mortars for setting dense tile and over hard to bond to surfaces.

California residents: see   Proposition 65 information

  • Designed to be mixed with PremiumPlus, MasterBlend or CustomBlend, standard or wall tile thin-set mortars mixed with non-polymer modified grouts or portland cement mortar mixes
  • Liquid polymer designed to be used in place of water
  • Increases bond strength and performance
  • Improves water resistance and shock absorption
  • Pre-measured container allows for ease of mixing with custom thin-set mortar

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can this product be used with Speed Finish - Patching and finishing compound? Thanks

Asked by: Sam
Thin-Set Mortar Admix is not recommended to be used with SpeedFinish Patching and Finishing Compound. The Patching & Leveling Latex Additive is recommended for creating better bond strength. For further assistance please contact our installation division at 800.272.8786 option 2
Answered by: CustomBuildingProducts
Date published: 2016-04-12

Can I tile over old glue?

My basement floor previously had Armstrong self stick vinyl tile. I cannot get the old glue off. It's not water based and it extremely sticky. A razor scraper does nothing. Can I mix thinset mortar with this admix and expect the porcelain tile to stick to the floor with the old glue still on it?
Asked by: Matt
Absolutely, "NOT" Never attempt to use Thin-set or Admix over old glue without sanding off the old glue from the substrate.
Answered by: DrDan
Date published: 2017-03-07

Should I use this?

I bought Merola Metro Mini Subway beveled white tile from you to use on my bathroom floors and shower walls. I plan to use .42 Hardie backer board 3x5 sheets as the substrate on both the walls and floors (over 3/4" plywood on floors). I wanted to use the polymer modified white VersaBond thinset from Custom Building Products. Should I use this thin-set mortar admix instead of just water?
Asked by: Judith
This product increases mortar performance when setting tile when compared to water for improved bond strength, so it is better to use this mortar admix rather than just water.
Answered by: CommunityAnswer
Date published: 2016-10-13

How much thin-set mortar admix do i have to add to custom bend thin-set?

Asked by: oliver
Follow the directions on the Custom Thin-Set Mortar Admix container or the Bag of Thin-set. I have a designated measuring cup for the Admix. Be sure to poor the Admix into the bucket first before adding the thin-set powder. You must let the mortar slag according to the directions provided on the Admix container. I also have a recipe note book for mixing small batches of thin-set and ad-mix so that my mixes are consistent each time I mix the thin-set. Work time for the thin-set is about 2 hours which can be vary depending on room temperature and relative humidity. Be careful not to mix more thin-set than can be used in your time frame. Once the thin-set begins to skin over or become more stiff than "peanut butter" consistency the mortar becomes difficult to use and sets up. At this point the thin-set cannot be used and must be discarded. Don't waste the Admix and Thin-set by mixing larger batches than can be used in your time frame.
Answered by: DrDan
Date published: 2017-03-07
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Customer Reviews

2.5 Gal. Thin-Set Mortar Admix is rated 5.0 out of 5 by 4.
Rated 5 out of 5 by from Easy to use in mixing Thin-set mortar. Replaces use of water and provides excellent consistency a... Easy to use in mixing Thin-set mortar. Replaces use of water and provides excellent consistency and adhesion for thin-set wall tile applications. Follow product instructions and mix thin-set to required proportions with the Mortar Admix. I have used this product for the past two years and it meets my expectations for all Thin-set Mortar applications.
Date published: 2017-03-07
Rated 5 out of 5 by from Great additive I am a mosaic artst and using this additive in my slurry mix really makes the grade. It makes your final project more resistant to water and let likely to damage when bumped or moved. Also seems to hold up through time and bad elements. I live in a high wind and cold climate in the winters and all I do is cover my projects with plastic tto avoid high blowing sand in spring. I would recommend it to anyone in this artistic area or anyone who does concrete sculpture as a top coat additive.
Date published: 2009-03-05
Rated 5 out of 5 by from works better than water I used this along with the 50lb bag of admix. And it worked far better than I could have hoped for. I actually mixed a sample of thin-set with just water and a sample with admix. the admix was far stronger and was not as brittle as the water mixed thin-set. Don't be cheap. buy both parts and use this in place of water.
Date published: 2014-12-23
Rated 5 out of 5 by from Use with custom mortar thinset 50lbs gray. Created a much more solid bond than using just plain mortar. Don't be cheap, buy both parts.
Date published: 2014-11-12
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