Echo Eliminator - Acoustical Backer

Bonded Acoustical Cotton Backer (AKA Quiet Liner)

Echo Eliminator Acoustical Backer (AKA Quiet Liner), made from bonded acoustical cotton (B.A.C.), is the most cost-effective acoustical absorbing backer material on the market. It is a high-performance acoustical panel manufactured from recycled cotton, and is ideal for any noise control application. Echo Eliminator Acoustical Backer is easily installed behind perforated panels to add exceptional acoustical absorption. Echo Eliminator Acoustical Backer may be eligible for LEED™ credits, is Class A fire rated, and 100% recyclable.

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  • Product Specs


    Residential, commercial, industrial; schools, restaurants, classrooms, houses of worship, community centers, offices, conference rooms, music rooms, recording studios, theaters, public spaces, medical facilities, auditoriums, arenas/stadiums, warehouses, manufacturing plants, and more.

    Material Composition

    Bonded acoustical cotton (B.A.C.) made from recycled fibers




    1/2" - 3 lb. pcf
    1", 1-1/2", 2" - 1.5 lb. pcf


    Standard Roll Width
    Standard Roll Length
    100' - 1/2" Thickness
    50' - 1" Thickness
    25' - 1-1/2", 2" Thickness
    Custom sizes available, please call or email for details.


    Marble Blue

    Installation Method

    Acoustical Backer

  • Color Options
    Echo Eliminator – Acoustical Backer
    Marble Blue

    Note: Although we take extensive precautions and purge the lines between colors, due to the manufacturing process color inconsistencies – including dye lot variations – flecks, specks, and other slight surface blemishes are unavoidable. Please call for details.

  • Acoustical Specs
    Echo Eliminator Acoustical Backer – Octave Band Absorption Coefficients
    Panel Thickness / DensityTesting Mount125 Hz250 Hz500 Hz1 kHz2 kHz4 kHzNRC Rating
    1/2″ 3 lb. pcfA0.
    1″ 1.5 lb. pcfA0.070.330.720.990.930.960.75
    1-1/2″ 1.5 lb. pcfA0.070.300.861.
    2″ 1.5 lb. pcfA0.350.941.321.
  • Material Performance

    Fire Performance

    Class A Fire Rated per ASTM E84

    Thermal Resistance (R-Value)

    1/2" 3 lb. pcf - 2.0
    1" 1.5 lb. pcf - 3.8
    1-1/2" 1.5 lb. pcf - 5.6
    2" 1.5 lb. pcf - 7.5