90 mil. Crack Isolation Sound Membrane

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MSC-90: 90 mil. Crack Isolation and Sound Membrane

PROFLEX® MSC is a 90 mil composite underlayment consisting of a rubberized membrane laminated to a high strength reinforcing fabric on the face and a release sheet on the adhesive side. PROFLEX® MSC is specially designed to be used under approved thinsets, mortars, and adhesives for interior and exterior applications of ceramic tile, stone, and brick, and for interior applications of wood flooring to eliminate the transmission of cracks and sound. Other applications also may be suitable. Contact Technical Support for further information. To eliminate cracks in finished floor work, the product should be applied to the entire substrate prior to the installation of the finished flooring.


  • 90 mil. thickness (0.090 of 1”)
  • Crack Isolation to 3/8”
  • Moisture Vapor Barrier 5lb. /1000sq.ft (24hr CaCl test)
  • Limited Waterproofing Applications.

Related Products

Sound Ratings

(ASTM E90-02, E989-89, E492-90)
STC (Sound Transmission Class) 72*
IIC (Impact Insulation Class) 72*

*Sound testing performed as to ASTM E90 and E492, test conducted on 8” concrete slab with acoustic ceiling.


100 sq. ft. per Roll

* MSC 90 requires an ANSI A118.11 thinset.


1 Roll per Box; 20 Boxes per Pallet

Contact Us

1603 Grove Ave, Haines City, Florida 33844

877-577-6353 Fax: 863-937-9624