Model # 0179594000

Internet #100317718

Store SKU #272760

Spec Mix 94 lb. Type S Masonry Mortar

Spec Mix

94 lb. Type S Masonry Mortar

  • Used in the application of brick, block and stone
  • Factory-blended for consistency
  • Meets ASTM C270 standards
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Frequently Bought Together

Product Overview

Designed specifically for use by masonry contractors, the Spec Mix 94 lb. Type S Masonry Mortar provides consistent batches of type S mortar for applying brick, stone and block. The mortar offers 1,800 psi strength and a 2-hour working time.

California residents: see   Proposition 65 information

Info & Guides

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Coverage Area (cu. ft.)
Product Depth (in.)
Product Height (in.)
Product Length (in.)


Color Family
Compression strength (psi)
Mix Type
Overhead Use
Product Weight (lb.)
Use Location
Working time (min.)

Warranty / Certifications

Manufacturer Warranty

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Customer Questions & Answers

Does this contain lime?

Asked by: Jrjrjr
YES!! Per the attached SDS Document it contains 5-10% by weight.
Answered by: GFactor
Date published: 2017-06-21

Can I use this for pouring concrete steps

Asked by: Jb
No, if you are going to pour a concrete step, use concrete, not mortar. The concrete has aggregate (small stones) in it which makes it stronger. This mortar is designed for setting blocks and bricks. If you want a smooth finish on the surface of the concrete steps, use a trowel or a float to smooth the surface once you have poured it.
Answered by: LosRubios
Date published: 2017-07-14

Can I use this on clay S shape roof tile?

Can I use this on clay S shape roof tile?
Asked by: Jose
This is not designed for roof tiles, but I have seen it used several times. If you are in a Hurricane or Tornado area, then do NOT use it. Instead, use a Roof Tile Mortar which can be found here.
Answered by: GFactor
Date published: 2017-05-15

I have left over Spec Mix and Gravel with sand from a previous project. Can I mix them together and use as concrete?

Asked by: HD
To be "By the book", my answer would be NO as it is not that simple. However, depending on what you were going to use it for, like in a nonstructural application, it MIGHT be okay. BUT, rule of thumb is a NO, don't do it.
Answered by: GFactor
Date published: 2017-07-08
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Customer Reviews

94 lb. Type S Masonry Mortar is rated 5.0 out of 5 by 4.
Rated 5 out of 5 by from Best Mortar Money Can Buy! Personally I think Spec Mix is the best mortar out there, I love it. ... Best Mortar Money Can Buy! Personally I think Spec Mix is the best mortar out there, I love it. The product always exceeds my expectations, it is easy to work with, has a great working time, and performs exceptionally well! I typically use a paddle mixer to mix the product, but mixing by hand in a wheel barrow or tub works just as well. If mixing by hand (shovel), make sure you actually mix it for at least 3-4 minutes initially, let it sit for around 3-5 minutes to allow the fine aggregate in the mix to fully saturate. Mix again for a minute or two until a uniform, workable consistency is achieved. If additional water is needed, add small amounts of water sparingly. Test the consistency of the mortar by gently “snapping” the trowel downward to remove any excess mortar. The proper consistency is achieved when the wet mortar will "hang" on a trowel held at a 90° angle. Cheers!
Date published: 2016-11-23
Rated 5 out of 5 by from I was asked if spec mix meets my expectations ? Answer : we built our pond with it and its not complicated to mix and it is totally worth the price
Date published: 2017-03-15
Rated 5 out of 5 by from One of the Best out there I have used Spec-Mix for tuck pointing repairs on chimneys, to build a natural stone retaining wall, to set natural stone floors and larger dimension tile (20x20) and recently to grout a flagstone mat floor walkway I just installed. In all instances, the product exceeded my expectations: easy to work with, great working time, and performs exceptionally well! I find it mixes well with a power drill and paddle mixer, but mixing by hand is fine too. Mix for about 3-4 mins, let it "slake" up a bit (slake: basically means to leave it alone after mixing)- about 5 mins - the process lets all the ingredients mix together well, and some water evaporates in the mix - goes to ensure less shrinkage when you apply product. Re-mix for about 1-2 mins after letting it slake up. Then you can apply! I go an extra step and mix with a fortifier (Sika Admix available at HD) This white admix and bonder strengthens the mix, and makes sure it bonds well to whatever surface you are applying it to. Not necessary, but I like to go the extra step.
Date published: 2012-02-10
Rated 5 out of 5 by from Great results for a first time user setting cap stones on a concrete block retaining wall We recently built a retaining wall out of concrete blocks. While we used construction adhesive to bond the concrete blocks together, we made the cap stones from natural sandstone and cemented them to the top of the wall using this masonry mortar. Despite it being the first time I've ever done a masonry job, I found that this was very easy to mix by hand with a small shovel to a consistency I was comfortable working with. Even though it was almost 100 degrees on the day I was installing the cap stones on the wall, the mixed mortar stayed workable for quite a while, allowing me to mix it up in smaller batches as I needed it. I mixed it a little wetter than I needed since it was a very hot day and then let it sit for 5 minutes or so before giving it one more mix with the trowel. I also found that I could keep the unused mix in good useable shape by misting it with water from a pump sprayer if it was getting too dry from the heat. When laying the cap stones, I sprayed the top of the wall with some water before applying the mortar and then scooped out a 'V' down the middle with the trowel tip. I set the sandstone on top and used a rubber mallet to gently tap it into the mortar and ensure it was level. The mortar set up well and there was quite a good suction even when the cap stones were first set while the mortar was still wet. A day later the cap stones were solidly set. Clean up was also easy - In places where the mortar had dropped onto the rough face of the concrete blocks, I just sprayed it with water from the pump sprayer after I set each cap stone (before the mortar had a chance to dry) and brushed it with a nylon nail brush and then sprayed it with water again to stop the light grey mortar from staining the brown colored blocks. I also mixed in some small stones and sand with the mortar in a small batch to help me make up for a shortfall of concrete when I was laying the foundations and it worked very well for this too.
Date published: 2016-09-12
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