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Saflex Acoustic PVB Interlayer
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Saflex Acoustic PVB Interlayer

Saflex QS31

Saflex Variant:

A tri-layer interlayer that can help reduce perceived noise by up to 50%.

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  • Exterior: Windows glazing, curtain walls and overhead glazing.
  • ​Interior: Partitions, windows glazing, skylights. Residential houses, airports, hotels, business offices, government buildings, hotels, restaurants, boardrooms, meeting rooms, medical care centers, health clinics, school classrooms, lecture halls, recording studios, broadcast facilities, concert halls, theaters, auditoriums, museums.


A multilayer product designed for improved handling and processability by allowing laminators to produce glass laminates with enhanced acoustical properties compared to standard polyvinyl butyral (PVB) alternatives.

 It offers all the traditional benefits of laminated glass, such as improved safety, enhanced security, durability and acoustic properties, whilst also providing protection from UV radiation (UVA and UVB) by blocking over 99% of UV transmittance, helping to reduce fading of the contents and interiors of a building. Saflex® Acoustic, a tri-layer PVB interlayer targets sounds in the 1000–4000 Hz range (an area sensitive in human hearing) for superior sound damping in laminated safety glass. Saflex® PVB interlayers have been awarded the Gold level Material Health Certificate from the Cradle to Cradle Products Innovation Institute. Cradle to Cradle Certified™ is the global, science-based standard for products that are safe, circular, and responsibly made.

Features and benefits:

  • Interlayer is treated to help protect surfaces from burglary, storms and UV damage.
  • As a coextruded product, Saflex Acoustic has all the advanced acoustic benefits of an acoustic PVB, with similar process parameters than standard Saflex Clear products. Reduced handling time combined with improved lamination yield will help glass laminators stay more competitive in the fast-growing acoustic LAG market.

General information


Pr_25_57_65_72 Polyvinyl butyral (PVB) sheetsPrimary
Pr_25_71_33_46 Laminated glass sheets


L40/170 Plastics glazing sheet

B12/390 Plastics glazing sheet

B12/45 Plastics glazing sheet

Specification data - Polyvinyl butyral (PVB) sheets Enhanced data


To ANSI Z26.1, ANSI Z97.1, AS/NZS 2208; CNS 1183, CPSC 16 CFR 1201, EN 12600 and ISO 129584.

PVB type

Acoustic control.


0.63 mm.


Insert requirement. Range: 1000-3220 mm.


Insert requirement. Range: 300000-600000 mm.

Sound reduction

Ranges from 36-51 dB Rw/STC depending on glazing used on glazed glass.


Hardness (shore A)



22 MPa.

ISO 527-3.



Light transmission


Impact resistance

To EN12600: 1B1 and to EN356: P2A.

(EN356: P2A is not applicable to QS31).


Saflex Acoustic Brochure

Saflex Acoustic Brochure

Case studies

Centre Point, London

Centre Point, London

Amazon Headquarters, Milan

Amazon Headquarters, Milan

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