Smart airtight and windtight sealing tape

Partel VARA™ SEAL is a high-performance tape with a humidity variable Sd value and an extremely strong, moisture resistant acrylic adhesive for excellent adhesion. It is suitable for internal and external applications – especially for sealing of overlaps, windows, doors and corners in any type of buildings.

The highest Passive House “phA Class” rating ensures the best energy efficiency standard for your low-energy project.

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Why Partel VARASEAL Tape?

  • Smart moisture variable tape with vapour resistance according to the ambient relative humidity (RH) – maximising dry connections all year round
  • Ensures optimum moisture flow through building structures with an Sd range of 0.4 m to 30 m
  • Passive House Certified airtight system – phA Class
  • Airtight connections to DIN4108-11
  • Features an air permeance value of <0.1 m³/(m²h) to DIN EN12114
  • Class W1 resistance to water penetration
  • Withstands a damp climate
  • Lifetime design – Advanced acrylic adhesive with excellent ageing resistance
  • Resistant to weathering, UV stability
  • Ecolabel Emicode EC1 – meets the strict requirements of GEV for constuction
  • Solvent-free adhesive with very low emissions and free of emulsifiers
  • Can be plastered over for seamless and waterproof airtight connections
  • VARA SEAL SL version has split release backing for quick installation


Suitable for the creation of permanent airtight and/or windtight connections of membrane overlaps, joints, junctions, corners, windows and doors.

Suitable for:

  • Internal and external use
  • All Partel interior and exterior membranes
  • Other airtight membranes including PE,PA,PP and aluminium
  • Wood base panels OSB, MDF and plywood
  • Bonding to timber, masonry, concrete, PVC, metal


  • 60mm x 25m (2-3/8” x 82’)