6mm Rubber Cork Underlayment (Glue Down)

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RCU-250: 6mm Rubber Cork Underlayment

PROFLEX® RCU-250 is an advanced composite sound control underlayment utilizing a combination of natural and engineered products to achieve superior IIC (Impact Insulation Class) and STC (Sound Transmission Class) sound reduction ratings. The product is also easy to install using a direct bond method, and is compatible with a variety of substrates and adhesives (see installation instructions for specific information). RCU-250 is suitable for use in both tile and wood installations.


  • Blended rubber & cork composite; superior bond strength to 100% rubber products
  • Suitable for tile and wood installations
  • Green product; qualifies for LEED points
  • Easy to install in the direct bond method

Sound Ratings

(ASTM E90-02, E989-89, E492-90)
STC (Sound Transmission Class) 56
IIC (Impact Insulation Class) 54*

*Sound testing performed as to ASTM E90 and E492, test conducted on 8” concrete slab with no ceiling assembly.


4′ x 30′ = 120 sq. ft. per Roll


102 lb. Rolls
16 Rolls per Pallet

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