EVERLAM™ SUPER TOUGH, our high modulus PVB interlayer for structural laminated safety glass

EVERLAM™ SUPER TOUGH is a high modulus PVB interlayer for structural applications. This property provides superior strength, stiffness and post-breakage behavior, making EVERLAM™ SUPER TOUGH ideal for applications in glass balustrades, balconies, canopies, curtain walls and sloped and overhead glazing. 

EVERLAM™ SUPER TOUGH combines a highly performing product with the superior level of technical expertise and service that has made EVERLAM’s reputation on the market of laminated architectural glass: 

  • Enhanced structural stability – EVERLAM™ SUPER TOUGH improves mechanical properties of laminated glass so that thinner glass can be used to reduce the weight and cost of the entire glass structure;
  • Superior  post-glass breakage behavior   a laminated glass structure made with EVERLAM™ SUPER TOUGH is held in place longer than one with a standard PVB, providing a higher level of safety while replacement is organized;
  • Modern design – architects can recommend oversized glass panels with minimum visible frames;
  • Processability – EVERLAM™ SUPER TOUGH can be processed on a standard lamination line;
  • EVERLAM manufacturing standards – it is manufactured according to the EVERLAM standards of high quality and performance consistency;
  • EVERLAM commitment – we will proactively test the material with you and provide immediate technical support to help with any issue you may have during the product introduction;
  • EVERLAM service excellence – quick response time, on-time product delivery, problem-solving, proactive and collaborative attitude.


EVERLAM™ SUPER TOUGH complies with the main international standards and code systems that apply to PVB film in building construction applications.

Certified for use in balustrades and balconies:

  • In Belgium: NBN B 03-004:2017.
  • In Italy: UNI 11678.
  • In Spain: CTE.

Certified for use in canopies in Europe (EU/EFTA):

  • EOTA EAD- 220025-00-0401 and TR001.


EVERLAM™ SUPER TOUGH performs as well as benchmark products on the market.

  Private Home Commercial Application
PVB Interlayer 740 N 1500 N.
EVERLAM™ SUPER TOUGH  8.8 mm  16.8 mm
Standard PVB film 22.6 mm 40 mm
Competitive stiff PVB film 9 mm 16.8 mm
Ionomer film 8.3 mm 15.9 mm

Data source: test performed at KiteGlass, comparing EVERLAM™ SUPER TOUGH with a standard PVB film, a competitive stiff film and an ionomer film (all were 1.52 mm thick interlayers laminated with 10 mm tempered glass), at ambient temperature. The test consisted in applying linear forces of 740 and 1500 N on laminated panels, which caused deflections that were then measured (in mm) and reported. Test method used: BS EN 6180.

EVERLAM™ SUPER TOUGH Typical Properties

Physical Properties

Property Test Method Units Test Conditions Typical Value
Specific Gravity ASTM D792   g/cm3 23°C 1.081
Sheet Moisture N-IR %   0.45

Mechanical Properties

Property Test Method Units Test Conditions Typical Value
Tensile Strength EN ISO 527 MPa 23°C / 50% RH 31
Elongation at Break EN ISO 527 %  23°C / 50% RH 196

Optical Properties

Property Test Method Units Test Conditions Typical Value
Optical Transmission EN 410 %   >88 (NC010)
Yellowness ASTM 1925   Thickness 0.76 mm <1.0
Haze ASTM D1003 %   <0.2
UV Transmittance ISO 9050 % Thickness 0.76 mm <2.0

Thermal Properties

Property Test Method Units Test Conditions Typical Value
Melt Flow Rate ISO 1133:2005 g/10 min 150°C/5.0 kg 0.41

This information corresponds to our current knowledge on the matter and may be subject to revision.