4515-S 3mm Regupol Acoustic Underlay


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Regupol 4515-S 3mm is a direct stick acoustic system designed to isolate approved resilient floor coverings from the main structure of the building, reducing impact energy generated by general footfall.  


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Unlike many other underlays on the market, 4515-S is ideal for use under resilient floor coverings as it contains NO rubber - thus preventing plasticizer migration - a very important consideration when installing vinyl, linoleum, marmoleum or other resilient floor surfaces. Plasticizer migration can cause resilient floor coverings to discolour and become brittle. Avoid this problem by using a product such as 4515-S which is specifically designed to circumvent these problems.

So, if 4515-S isn't made of rubber, what is it made of?.... Regupol 4515-S is manufactured from high quality, light weight PUR foam granulates and cork, bound with polyurethane.  Examples of resilient flooring include vinyl, rubber, pvc, marmoleum and linoleum. Resilient flooring is basically any floor covering that has some 'give' or 'flex' without cracking, and provides some degree of cushioning when a load is placed upon it.

Regupol 4515-S 3mm attenuates impact sound at source. The resilient flooring can be installed directly over the acoustic underlay, eliminating the need for separation layers. Regupol 4515-S 3mm has a smooth texture and a sanded finish.

4515-S is independently tested under laboratory controlled conditions and on-site testing to show it meets the Deemed-to-Satisfy Provisions of the current building regulations in accordance with the Building Code of Australia Part F5.4 Sound Insulation Ratings of Floors (Impact).


  • Offers long term performance without collapse or bottoming out.

  • Prevents plasticizer migration - WHY? - because it contains NO rubber.

  • Minimal creep, even under high loads.

  • PVC Free

  • Low VOC and low odour

  • Resistant to ageing and deformation.

  • Quick and easy to install.

  • Minimises construction heights.

  • A Good Environmental Choice Australia Certified sustainable product (GECA)

  • High quality and exact material thicknesses.

  • Made in Germany from recycled, lightweight material

  • Suitable for use with under floor heating.

  • Protects expansion joints.

  • Sanded on one side.

  • Limits sound transference.

  • Cushioning qualities make flooring comfortable underfoot.

  • Proven durability.

  • Manufactured and Certified to OHAS 18001:2007, DIN ISO 9001:2008, DIN ISO 14001:2004 Management Systems.

  • Regupol is a Natspec product partner. 


Regupol adhesives are formulated to maximize the performance of Regupol flooring and acoustic products. Regupol adhesives are made in Australia and are VOC compliant for green buildings, offering specifiers and installation contractors a warranted flooring system.

Data sheet
Product descriptionElastic pre-manufactured acoustic underlay made from foam-granulates and cork, bound with polyurethane.
Roll width1.0 metres
Roll length20 metres
Material thickness3mm
Specific weight1.25kgs/m2
Thermal conductivity0.12 W/mK
Density430 kgs/m3
Tensile strength0.9 N/mm2 (DIN 53571, Specemin B)
Elongation at break30% (DIN 53571, Specimen B)
Temperature resistance-40˚C to +115˚C
Fire classificationB2 (DIN 4102)
NoticeData is based on periodical lab testing of test specimen taken from the actual manufacturing process and show the average values as measured. Slight tolerances within the common limits are possible.

 Resilient Floors:

Regupol Acoustic Underlay Resilient Flooring Brochure

Rubber Floors:


4515-S Rubber Floors

 Polyurethane Floors:

4515-S 3mm Acoustic Underlay for Polyurethane





Regupol underlay is used in most building constructions including:

  • Apartments

  • Schools

  • Offices

  • Hospitals

  • Libraries

  • Commercial Buildings

  • Multi-storey buildings

  • Private homes

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