Karma Visco 33/33HD


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 or cement particleboard by visco elastic sound damping strips. A resilient layer of acoustic chipfoam is adhered to the underside.

Features/ Benefits:

  • Laid on top of existing timber floorboards.
  • Excellent impact and airborne performance.
  • Adds mass to lightweight constructions.
  • Acoustic chipfoam contours over minor irregularities.
  • Karma Visco 33/33HD can also be used with lath and plaster ceilings.

General information

Uniclass 2015

Pr_25_71_97_53 Medium-density fibreboardsPrimary


K11/125 Battened particleboard floating floor

K11/20 Battened particleboard floating floor

K11/225 Particleboard floating floor

K11/25 Particleboard floating floor

K11/275 Acoustic separating floor system

K11/30 Particleboard flooring

Specification data - Medium-density fibreboards

Product Reference

Karma Visco 33

18.4 kg/m². MDF, chipboard and chipfoam.

Karma Visco 33HD

27.9 kg/m². MDF, cement-particle board and chipfoam.



Acoustic sealant

Reduc isolation strip

Reduc joint adhesive

Standard product features

Size (l x w):

1200 x 600 mm.


33 mm.

Laid area per board:

0.72 m².

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