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Internet # 304491881

Model # LMSC90

Store SKU # 1003158284

MSC 100 sq. ft. Roll 39 in. W x 30.5 ft. L x 90 mil T Underlayment for Ceramic Tile, Stone, Brick, and Wood Flooring

Covers 100 sq. ft.
$1.60
/sq. ft.
($159.63 )
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  • Provides moisture control, crack suppression, and sound control
  • For ceramic tile, stone, brick and wood flooring
  • Great for interior and exterior applications
  • View More Details

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Product Details

About This Product

PROFLEX MSC90 is specially designed for use under approved thinsets, mortars, and adhesives for interior and exterior applications of ceramic tile, stone, and brick, as well as for interior applications of wood flooring to eliminate the transmission of cracks and to reduce sound transmission. This 90 mil composite underlayment consists of a rubberized membrane laminated to a high strength reinforcing fabric on the face and a siliconized release sheet on the adhesive side that produce full provide crack suppression and sound control. For best results to eliminate cracks in finished floor work, apply the product to the entire substrate prior to the installation of the finished flooring for crack suppression. Not intended for use around pools.

Highlights

  • For use under approved thinsets, mortars, and adhesives for interior and exterior applications of tile, stone, and brick, as well as for interior applications of wood flooring to eliminate the transmission of cracks and reduce sound transmission
  • Made of a rubberized membrane laminated to a high strength reinforcing fabric on the face, and a siliconized release sheet on the adhesive side to provide full coverage crack suppression and sound control
  • Ready for tiling immediately after installation
  • 100 sq. ft. per roll
  • Moisture vapor barrier up to 5 lb. per 1000 sq. ft. (24 hr. CaCl test)
  • Easy and fast to install with standard tools on the entire substrate prior to the installation of the finished flooring to ensure crack suppression
  • Dimensions of each roll: 39 in. W x 30.5 ft. L x 90 mil T
  • Crack and joint isolation membranes to absorb the stress produced by movement in the concrete up to 3/8 in.
  • Not intended for use around pools
  • Return Policy

Product Information

Internet # 304491881

Model # LMSC90

Store SKU # 1003158284

Specifications

Dimensions

Area Coverage Per Roll (sq. ft. for each roll)

100

Product thickness (mil)

90

Recommended overlap (in.)

0

Roll Length (ft.)

30.5 ft

Roll width (in.)

39

Details

Color Family

Gray

Flooring Material Features

Crack resistant, Sound absorbing

Flooring Product Type

Underlayment

Flooring Type

Solid Hardwood, Stone, Tile

Location

Floor

Material

Fabric

Number of Rolls Included

1

Package coverage (sq. ft.)

100

Returnable

90-Day

Subflooring type

Concrete

Warranty / Certifications

Manufacturer Warranty

1 Year Limited

Questions & Answers

Hello, For HOA approval purposes, could you please provide or attach the manufacturer product data sheet for ProFlex™ 90 (90-mil sound control underlayment), including IIC and STC test results? Thank you.
ByJan 2, 2026
1 Answer | 
Answer This Question

The II is 68 and the STC is 72 conducted on a 8" concrete slab with acoustic ceiling. For further assistance, please contact customer care at 866-435-8665. Customer Care

By|Jan 2, 2026


    Can it be used with radiant heating floors?
    ByNov 26, 2025
    1 Answer | 
    Answer This Question

    Yes, the LMSC90 may be used in conjunction with radiant heat flooring. Customer Care

    By|Nov 26, 2025


      How can I get the full spec sheet? I need STC level for condo review
      ByOct 28, 2025
      1 Answer | 
      Answer This Question

      Please contact customer care at 866-435-8665 for these documents. Customer Care

      By|Oct 29, 2025


        Could you use this as underlayment for a garage roof?
        ByJul 23, 2025
        1 Answer | 
        Answer This Question

        This product has not been tested for use on a garage roof. Customer Care

        By|Jul 25, 2025


          Could this be used in place an uncoupling underlayment like Ditra in a small area with 8”square tiles?
          ByJul 1, 2025
          1 Answer | 
          Answer This Question

          The LMSC90 is an uncoupling membrane. If this is the purpose it would work fine. As always, please be sure to follow all manufacturing recommendations. For further assistance, please contact customer care at 866-435-8665. Customer Care

          By|Jul 1, 2025


            can this be used with luxury vinyl
            ByMay 31, 2025
            1 Answer | 
            Answer This Question

            We do not recommend using this product with luxury vinyl flooring. Customer Care

            By|Jun 2, 2025


              Do I need any primer before install this product?
              ByMay 19, 2025
              1 Answer | 
              Answer This Question

              Yes, the PR11 primer is recommended before installation. For further assistance, please contact customer care at 866-435-8665. Customer Care

              By|May 19, 2025


                Can I put this down on cement floor for sound proofing, then put carpet pad and carpet over it
                ByMar 4, 2025
                1 Answer | 
                Answer This Question

                Yes, you can do that, however you would not need to add the membrane. Carpet and a good carpet pad is the best for sound control. Customer Care

                By|Mar 11, 2025


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                  The manager was so nice and the forklift men both do my dream can true
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                    Product Snapshot

                    Ideal for customers who want crack suppression and sound control, ensuring optimal performance under tile, stone, and wood flooring.
                    Great for homeowners looking for superior acoustic performance, making floors quieter. Features a built-in moisture barrier and is FloorScore certified for peace of mind.
                    Ideal for homeowners looking for acoustic performance, making floors quieter with sound dampening technology.
                    Great for homeowners looking for sound absorption, making installation easier and more efficient. This underlayment is perfect for reducing noise transfer and enhancing underfoot comfort.

                    Thickness

                    90 mil
                    1 mm
                    0.08 in.
                    1/8 in.

                    Sound Absorption

                    HIIC up to 76, IIC up to 69 dB, STC up to 62 dB
                    IIC up to 74 dB

                    Moisture Barrier

                    Thermal Insulation

                    Compatibility with Floor Type

                    Solid Hardwood, Stone, Tile
                    Engineered Hardwood, Laminate, Vinyl
                    Laminate, Engineered Hardwood, Solid Hardwood
                    Carpet, Engineered Hardwood, Laminate, Solid Hardwood, Vinyl