Custom Audio Designs Ltd


VL65 | Acoustic Membrane | VL65 Sound Insulation | Viscolastic Damping Sheet

mass loaded barrier mattingvl65 acoustic membranemass loaded barrier matvl65 membranevl65 acoustic membrane

VL65 acoustic membrane

recycledRecycled content used in this product

vl65 acoustic membraneDownload PDF


  • Easy to use, cut and trim.
  • Supplied in roll form.
  • Airborne noise reduction.
  • Very high acoustic performance.
  • Visco-elastic.


  • Improved low frequency performance.
  • Self adhesive version available.
  • Also acts as a VCL.

Acoustic Membranes Just Got Better !

VL-65 is a high mass, viscolastic acoustic damping membrane with the added advantage of improved low frequency performance over our other acoustic membranes. Internally reinforced with a micro fibreglass carrier for improved dimensional stability.

  • Soundproofing against airborne noise in floors, walls and ceilings when used in conjunction with other low surface density materials.
  • VL-65 is acoustically equivalent to lead of the same surface weight.
  • When bonded between stiff rigid sheet materials it greatly reduces the resonance and coincidence dips.
  • Stapled over frameworks it greatly improves the performance of lightweight partitions.
  • When bonded to resonating metal panels it greatly reduces vibration and re-radiated noise.
  • Offers high acoustic performance when combined with sound-absorbent materials.
  • Can be used for damping of impact noise caused by atmospheric agents on metal deck roofs.
Freq, f, Hz506380125250500100020004000Rw

Test Report Number: 130702/002

Density1.9g/cm³ (+/-0.05)
Roll Size5.5m x 1m
Fire ResistanceB,s1,d0 when used in partitions as shown below
Water vapour resistance (µ)50000
Maximum Tensile Strength350 ±150 / 250 ± 100 EN 12311-1
Elongation±45 EN 12311-1
Cold Flexibility-10°C; EN1109
High Temperature Flow Resistance120°C; EN1110

VL-65 eliminates the coincidence dip around 2.5kHz, found in rigid sheet materials such as plasterboard on studwork by 12dB

The tests below show standard studwall constructions with and without VL-65 sandwiched between the sheets.

The low frequency resonance dip at around 160Hz is reduced by 8dB.

This superb material will improve the overall averaged Rwof a stud partition, as shown below, by 6dB.

vl65 internal partition
vl65 acoustic insulation values
vl65 separating partition
vl65 acoustic insulation values

All information contained in these details is given in good faith but without warranty.
Custom Audio Designs reserves the right to alter the specifications of any product without notice.
©Custom Audio Designs