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Isola Mestertekk is suitable for almost all types of roof, including flat and sloping designs, and is used for waterproofing of new roofs and renovation of old roofs. The product is based on a versatile polyester reinforcement together with SBS-modified bitumen to produce high strength, flexibility and elasticity. The product is loose laid and mechanically fixed to the roof structure and is supplied with a thin sacrificial film in the 120 mm wide overlap, ensuring fast and safe welding with gas burner or hot air equipment.


  • Longitudinal tensile strength: 890 N/50 mm.
  • Transverse tensile strength: 720 N/50 mm.
  • Longitudinal elongation at break: 55%.
  • Transverse elongation at break: 55%.
  • Longitudinal tear strength: 80N.
  • Transverse tear strength: 95N.
  • Puncture resistance (19 mm diameter, increasing load): 930N.
  • Puncture resistance (dynamic): 10 mm diameter.
  • Longitudinal dimensional stability: -0.20%.
  • Transverse dimensional stability: +0.15%.

Fire resistance:

Class Ta/ NS Licence no 538/ appendix 4 - Test: NS-INSTA 413.


Refer to Triton technical department for recommendations.

General information
Specification data
Product Reference

Isola Mestertekk


521201 Grey

521214 Black

521224 Brick red

521236 Pine green

521241 Sapphire blue

521242 Alm brown

Standard product features

Nominal dimensions and weight:

  • Roll length: 10.0 m.
  • Roll width: 1.0 m.
  • Width of overlap: 120 mm.
  • Thickness: 3.9 mm.
  • Roll weight: 46 kg.