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542 Liquid Backer Board 40 lbs. Self-leveling Underlayment

$6931
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  • Covers area up to 52 sq. ft. at 1/8 in. depth
  • Allows installation of tiles in 6 hours
  • Ideal to use over concrete surfaces and radiant heated flooring
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Product Details

Henry 542 Liquid BackerBoard is a Portland cement based self-leveling underlayment. It is the fastest and easiest way to prepare wood floor for the installation of ceramic tile. It smoothes wood without the need for lath mesh. It can be used over concrete surfaces and radiant heated flooring.
  • 52 sq. ft. of coverage at 1/8 in. depth
  • 10 minute working time
  • Walkable in 3 hours
  • Install tile in 6 hours
  • Return Policy

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From the Manufacturer

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Specifications

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Questions & Answers

82Questions
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Q:If I pour a 2nd coat of 542 do I need to use a primer between coats?
by|Jan 31, 2023
1 Answer
Answer This Question

A:  Yes, the existing Henry 542 would need to be primed prior to installing a second coat of Henry 542.

by|Feb 1, 2023
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    Q:I know we can pour this over OSB using the primer first. And I know you it says you can install hardwood over it. We will be putting engineered hardwood over it and gluing and stapling with 18 gauge staples. Any issue with the staples going into it?
    by|Aug 12, 2022
    3 Answers
    Answer This Question

    A:  I wouldn’t staple into it. There is no need to staple and glue an engineered wood floor. 

    by|Aug 14, 2022

      A:  No self-leveling material should be used under stapled or nailed wood flooring.

      by|Aug 21, 2022

        A:  I doubt that stapling through a concrete based product will have good results. You would need to use an appropriate glue only. Staples will tend to pop up bits of the product under the installation creating bumps or not penetrate and just glance off the surface. 

        by|Aug 15, 2022
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          Q:Can vinyl sheet flooring be installed over 542 Liquid Backer Board?
          by|May 17, 2022
          1 Answer
          Answer This Question

          A:  542 LBB was designed for hard surfaces. Henry 555 is designed to work with sheet vinyl and other materials. Internet #100549588 is the # you need. Don't forget the primer-- Internet #100564959 for Henry 554 underlayment primer.

          by|May 18, 2022
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            Q:542 Liquid Backer Board is obviously NOT liquid.
            by|Mar 11, 2022
            1 Answer
            Answer This Question

            A:  Be sure you used the proper mixing ratio: 4.75 quarts (4.5 L) of water per 40 lbs. (18 kg) bag. Also be sure you mix to the instructions for the proper time and speed of mixer. Let us know if you have questions.

            by|Mar 18, 2022
              Showing 1-4 of 82
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              Customer Reviews

              4.5 out of 5
              (42)
              • 4.5
                out of 42 reviews
              • 79%recommend this product
              Filter by:
              Showing 1-10 of 42 reviews
              This product is great and I do not know why it is not stocked in any HD in the area where I live ...
              This product is great and I do not know why it is not stocked in any HD in the area where I live (Western Washington). It mixes well and pours easily. It leveled out as poured fairly well and ended up perfectly flat for the 12'x12' that we did. We poured it over a Heat-Matrix uncoupling mat which made placing the tile much easier than placing the mortar into the mat first then placing the tile. It sets up quickly so we mixed all 9 bags at once. It has been installed for about a month as of this review. Very happy with the result!
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              Great solution for self-leveler without metal lath mesh needed
              I am a DIYer and was looking to remodel a small powder room (pictured). The plywood subfloor was uneven due to settling over the years, so I used Henry 542 to level the floor ahead of my Ditra underlayment & tile installation. As someone who has never used self-leveler before, Henry 542 is incredibly easy to use and works as advertised. I liked it because it did not require metal lath on the subfloor for structural support like other solutions. Follow the directions, including priming the wood surface with Henry 564, 554, or 543 solution (sold in a bottle) using a short nap or foam roller. When mixing the water and the 542, make sure you measure the amount of water per the instructions. It was also important to have the appropriate barriers to prevent the mixture from flowing everywhere. It is a runny consistency and goes wherever gravity lets it, so you have to build containment. There are solutions out there that are easy to use and I used one which was essentially styrofoam that let me cut the excess/top away after the leveling mix dried. Also worth nothing, you can spot-level the floor and do not need to cover the entire surface as I did. Finally, as silly as it sounds, practice your pour with an empty bucket!!! Make sure you know the path you are going to pour before mixing and pouring. You only get one shot and any attempts to smooth after pouring will be a challenge as the mixture starts to harden pretty quickly (see my picture and on the right where I messed up a little). My room was small enough where I did not need to walk in the mixture, but I have read that soccer cleats should be worn to prevent permanent imprints in the surface if you are walking through it. Overall this was a very easy to use product and worked as advertised!
              by
                • Recommended
                6 found this review helpful
                The product worked as advertised. I did a 25 square-foot...
                The product worked as advertised. I did a 25 square-foot small bathroom. I used it to level the floor not to even it out. The floor had a slope to it that I wanted to correct. I poured it on and troweled it lightly to coax it to flow. It flowed relatively well but there was a little uneveness to it once it hardened but it corrected the slope problem.
                by
                • Verified Purchase
                by
                • Verified Purchase
                This stuff is awesome!!...
                This stuff is awesome!!
                by
                • Verified Purchase
                by
                • Verified Purchase
                Great product when you follow directions
                I used Henry 542 over new plywood floor to correct a dip in the center. I patched joints with Henry 549. I applied Henry primer 554 per directions and waited 12 hours before applying Henry 542. I mixed Henry 542 per directions. Product flowed evenly, used strike off to even out product and then a magnesium float to finish. I had 25 minutes of working time in a 70 degree room. Very satisfied with product and results.
                by
                • Verified Purchase
                • Recommended
                Easy to install, time will tell how durable of a...
                Easy to install, time will tell how durable of a substrate it is. Tile adhesion seemed good despite the smooth surface.
                by
                • Verified Purchase
                "Self-leveling" - a bit of a misnomer
                This product is a good solution when needing to flatten out a plywood/OSB subfloor where you don't want to use lath and also need to feather to a high spot in the floor.
                by
                  • Recommended
                  perfect for wood subfloor. Dry time was exactly according...
                  perfect for wood subfloor. Dry time was exactly according to directions
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                  • Verified Purchase
                  Showing 1-10 of 42 reviews

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