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150mm Tescon Vana Roll
Tescon Vana 150mm sealing a valley detail on wood fibreboards
Tescon Vana is used to seal overlaps on internal airtight vapour control membranes at overlaps
Tescon Vana sealing overlaps on external breathable windtight membranes

Pro Clima Tescon Vana

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  • Product Overview
  • Technical Details
  • Installation guide

Main purpose

To airtight seal membrane overlaps, edges, penetrations and connections to airtight accessories.

Use it on

Internal or external membranes, airtight accessories, timber and concrete.  On walls, roofs, floors and ceilings.


Pro Clima Tescon Vana is a robust airtight tape for creating airtight seals that last 100 years, on airtight membranes and windtight breather membranes. Tescon Vana is perfect for sealing overlaps, edges and penetrations as well as connections to most surfaces commonly found on a building site (a primer may be required).  It is waterproof and can be left exposed to UV and weathering for up to 6 months before construction of the external finish on the building is completed.

Where to use it

Tescon Vana airtight tape will permanently stick to any Pro Clima internal or external membrane and other membranes made from PE, PA, PP, PET and aluminium.  It will also permanently bond to planed or painted timber, OSB, plywood, MDF, hard plastics and metal. 

To ensure good adhesion on wood fibre insulation boards (e.g. Gutex), concrete, plaster or smooth masonry, Tescon Primer RP or Tescon Sprimer should be used first to stabilise the surface.  On surfaces that are painted or may come away, detach or delaminate, we recommend doing an adhesion test first.

What it does

Tescon Vana is a robust airtight adhesive tape for creating permanent airtight seals on membranes and airtight accessories. 

The 60mm width is ideal for sealing overlaps and connections with the recommended 25-30mm of tape on each surface.  

150mm width is perfect for sealing valleys, eaves and ridges on roofs with external wood fibre insulation; 75mm on each surface provides the optimum strength and durability at these critical junctions.  It is also useful for sealing up the holes through which fibrous insulation was blown into walls and roofs. 150mm is also handy for creating patches to repair accidental punctures or tears in membranes that can occur during construction.  

Pro Clima membranes include a printed guide along the edge to easily line up the correct amount of tape.

How it works

Tescon Vana uses fully waterproof solid acrylic glue that is unaffected by changes in temperature and humidity. It has high adhesion and excellent cohesion which means the glue holds together, won’t slip and can provide the longest lasting seal possible.  Lower quality tapes use dispersion glue which reacts with moisture to cause the adhesive to break down relatively quickly (within a few months). Tescon Vana, with its solid acrylic glue, actually gets stronger over time and is perfect for building projects in wet climates and extreme weather conditions like those in the UK and Ireland.

Why we love it

Tescon Vana creates an airtight seal that lasts 100 years. This has been independently tested and proven, by Kassel University, using accelerated aging techniques. Only Pro Clima have achieved this level of durability for airtight tapes.  It is also Passivhaus certified as part of the Intello Plus system attaining the best results ever recorded. 

After 24 hours, you will no longer be able to remove the tape.

System warranty

Pro Clima provide a limited system warranty, backed-up with public liability insurance, for all airtightness system, roof and wall sealing system and construction products that they supply. A 10-year warranty is provided for these products when correctly installed in combination with approved thermal insulation materials and other Pro Clima system products.  When correctly installed in combination with other manufacturers’ products (not made by Pro Clima), a 6-year warranty is provided.


  • Airtight for over 100 years
  • Versatile, multi-purpose tape
  • For use indoors and outdoors
  • Certified for use with Intello Plus
  • Low VOC rating


  • Certified accelerated ageing tests and solid acrylic glues give confidence that Tescon Vana will remain stuck and airtight for 100 years
  • One of the most popular tapes in the Pro Clima range as it is so adaptable for high-performance construction
  • Waterproof, it can be left exposed to the weather and UV for up to 6 months during construction
  • BBA and NSAI system accreditation with Pro Clima’s Intello Plus membrane gives specification confidence
  • Passivhaus approval with the Intello Plus system
  • Excellent values in the hazardous substance test, giving installers peace of mind


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Technical Details

Key Technical Data

Technical Datasheet

Material Safety Datasheet (MSDS)


System Brochure

Installation Guide

How to Install

Ensure all surfaces are dust, grime, grease and silicone free. Cut a manageable length of tape or put your forearm through the roll to hold it and unroll what you need as you go. Remove the release paper and place the tape over the centre of the overlapping materials.

150mm Tescon Vana used to seal a roof ridge.
150mm Tescon Vana used to seal a roof ridge.
Sealing membrane overlaps with Tescon Vana tape
Sealing membrane to OSB with Tescon Vana tape
Tescon Vana tape sealing Intello Plus overlaps
On site application of Tescon Vana sealing Intello Plus membrane
Ecological Building Systems
Tescon Vana being smoothed over on an Intello membrane using a Pressfix tool
Using a Pressfix tool

Firmly press the tape onto the surface with a Pressfix Tool. Using a Pressfix ensures the maximum strength of bond can be achieved.

Sealing Around a Window

Ecological Building Systems

Hints and Tips

The tape will not come off, so be careful and accurate where you apply it. Pro Clima Glumex Adhesive remover can be used to remove the tape and its residue.

Tescon Vana can be used for repairing items in and around the home. E.g. bags, suitcases, carpet, clothing etc.

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