Regupol® 4515 Multi 3mm Acoustic Underlay

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Regupol® 4515 Multi is a tough, resilient acoustic underlay manufactured from PUR Foam and cork granules perfectly suited to all new build type constructions to comply with Part E 2003 and can be bonded to all types of floors.

Regupol® 4515 Multi acoustic underlay is compatible with all types of floor finishes including ceramic tiles, sheet vinyl and vinyl tiles, wood and laminates, carpet and marmoleum/linoleum.

3mm thick,  each 1m x 20m roll covers 20m

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Regupol® 4515 Multi 3mm Acoustic Underlay

A high performance acoustic underlay made from 100% recycled rubber/cork compound and helps to achieve Part E compliance with hardwood and laminate floor finishes. It is manufactured without blowing agents and has Zero Ozone Depletion and Zero Global Warming Potential.

Regupol® 4515 Multi  delivers impact sound insulation of 18dB and thermal conductivity of 0.86W.m/k

The Regupol® 4515 range can be installed without specialist contractors. Simply roll out 4515 a few hours prior to installation, ensure that the subfloor is smooth, sound and dry.

Rolls must be stored indoors and be kept dry prior to fitting. Suitable for new builds, refurbishments or bespoke architectural projects.

3mm thick,  each 1m x 20m roll covers 20m

Can be used in residential, commercial or education settings.


  • Independently tested under laboratory controlled conditions and on-site using UKAS accredited and ANC approved bodies respectively to show compliance with the new building regulations in accordance with Approved Document E 2003. When used in acoustic floors under Part E of the Building Regulations and Robust Details is accepted by the NHBC.
  • Highly sustainable and completely recyclable.
  • Offers long term performance without collapse or “bottoming” out under high point loads.
  • Resistant to ageing and deformation.
  • Quick and easy to install. Simply bond to the subfloor beneath the final floor finish.
  • Reduces construction heights.
  • Suitable for both new build and refurbishments.
  • High quality and exact material thickness guaranteed.
  • Suitable for use with under floor heating.
  • Very comfortable under foot.
  • Suitable for all floor finishes including ceramic/stone tiles.
  • Due to no rubber content Regupol® 4515 Multi acoustic underlay does not cause plasticizer migration when used with certain adhesives and floor finishes such as vinyl linoleum and light coloured carpets.

Technical Information Regupol® 4515 Multi


approx 420kg/m3

Tensile strength (DIN 53571)

approx 0.7N/mm2 (4.5mm thick)

Elongation at break (DIN 53571)

approx 25%

Temperature resistance

-40 to +110°C

Thermal conductivity

approx 0.086W/mk

Impact sound insulation ΔL W

18dB (measured in accordance with BS EN ISO 140-8:1998)


*NB due to the composition of Eco, this product is prone to plasticiser migration when used with certain types of adhesives. This may cause discolouration of light coloured carpets, vinyls and linoleums; therefore we recommend that Regupol 4515 Multi be used for these types of floor coverings. 

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Regular Price: £148.00

Special Price £136.00

Availability: In stock

  • Buy 20 for £124.00 each and save 9%