AcoustiCORK RR300

Our Price
$0.48 sqft
$96.00 roll
reg: $0.64 sqft
roll: $128.00

Proudly made in the USA
Ships between Mar 8 - 10
Color: roll over image to magnify

3.2mm thick 4' x 50' roll
Accessories for AcoustiCORK RR300

Description - AcoustiCORK RR300 Rubber underlayment has been specifically designed to be the best underlayment to use under floating floor systems. RR300 can also be used under other floors such as cermaics, harwoods and stone among others. This rubber underlayment can be adhered by adhesive, double sided tape, nails or staples and does not hold water, which helps make this underlayment resistant to mold and mildew. In areas where water may be present, a vapor barrier would be required to protect the flooring surface. But in areas where water would not be present, a vapor barrier would not be necessary unless specified by the manufacturer’s warranty. RR300 also has properties which aid in the suppression of cracks in ceramics, stones, and hardwoods due to subfloor fracturing. This ensures that your flooring surface stays crack free for the lifetime of the floor. This underlayment is also great to use under our Modular Flooring because it helps reduce the noise caused when walking or driving over them.
Material - AcoustiCORK RR300 is composed of 85% post-consumer recycled content.
Width - 4 feet wide per roll.
Length - RR300 comes in 50’ lengths only.
Thickness - 3.2mm (Approx. 1/8”).
Weight - 0.45lbs./sqft.
Origin - Made in the USA.
Recommended Uses - AcoustiCORK RR300 flooring underlayment is designed to be used in both commercial and residential applications. This sound proofing underlayment is the favorite to use under hard surfaces such as natural stone and hard woods, but it has also been successfully used under luxury vinyl tile (LVT) and plank, ceramic tile, laminate, engineered wood, real wood, marble, brick, pavers, parquet, carpet and tiles. It is not recommended for VCT (Vinyl Composition Tile), vinyl, and linoleum.

  • AcoustiCORK RR300 underlayment typically ships within 10-12 business days and delivers within 11-16 business days depending on your location.
  • An email will automatically be sent to you with your tracking information as soon as your rubber underlayment ships and tracking information becomes available.

For complete floating floor installation instructions, please Click Here.

For complete nailed wood floor installation instructions, please Click Here.

Subfloor Type Wallboard Ceiling Floor Covering IIC Rating STC Rating
8" Concrete Slab No Floating Wood 55 54

Tested in Accredited Laboratories as per ASTM E-90/E-413 (STC) and ASTM E-492/E989 (IIC).


  • IIC 55, STC 54.
  • Can be used under floating floors, natural stone, hardwoods, LVT, laminate, engineered wood, carpet, ceramic tiles, and many other flooring surfaces.
  • Not recommended to be used under VCT, vinyl, and linoleum.
  • Great to use under our Modular Flooring.
  • Mold and Mildew resistant.


How To Install Rubber Underlayment

Shipping Video


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