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BUTYL Stretch Flex

BUTYL Stretch Flex
For the easy, permanent sealing of penetrations such as rafters at wall junctions, chimneys, ventilation pipes and electrical conduits. Highly suitable for sealing of irregular shapes, such as purlins etc. can adapt to any shape.

300 % expandable
Thickness: 2 mm
Working temperature: from +5 °C

Available dimensions

Article number Roll width Roll length Carton Inquiry List
3DEHNFL 50 mm 10 m 6 rolls
3DEHN8 80 mm 10 m 4 rolls
3DEHN1 100 mm 10 m 4 rolls

Product data

Field of application

  • for trouble-free seals at penetration points such: rafters, outlet vents, electrical ducts


  • high elasticity
  • a tape for all penetrations
To guarantee air and wind-tightness for the skin of a construction it must have the appropriate foils or panel materials providing a permanent seal at overlaps, gaps, joints and penetration points. BUTYL Dehnflex - Stretch Flex is used particularly as a seal at penetrations points for wind seals, vapour barriers, roof underlays and OSB. Due to its great flexibility the tape can easily be positioned around the openings that require sealing and neatly pressed down. Its extremely good adhesive properties permit work on a variety of substrates mostly without a primer.
Material composition
Highly flexible butyl rubber tape, adhesive on one side
2 mm
Temperature resistance
-40–100 °C
Working temperature
5–40 °C
Light grey
300 %

Processing guideline