Karma Visco 33/Karma Visco 33HD

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Karma Visco 33 and Karma Visco 33HD are acoustic overlay boards designed to attenuate impact and airborne sound passing through existing timber floors. The top layer of moisture resistant MDF is separated from the bottom layer of chipboard (Karma Visco 33) or cement particleboard (Karma Visco 33HD) by visco elastic sound damping strips. A resilient layer of acoustic felt is adhered to the underside.


  • Laid on top of existing timber floorboards
  • Excellent impact and airborne performance
  • Adds mass to lightweight constructions
  • Acoustic felt contours over minor irregularities
  • Strata Extra can also be used with Lath and Plaster ceilings


Board dimensions: 1175 x 575 x 35mm
Laid area per board: 0.675 m2
Board weight: 18.4kg/m2 – 27.9kg/m2

Karma Visco Joint Adhesive

Karma Visco Isolation Strip

Acoustic Sealant