Airtight Tape

£40.00 GBP

Sale Sold out

Our Airtight Tape is a premium, fleece-backed sealing tape designed to deliver long-lasting airtightness and vapour control across a wide range of construction details. Flexible, durable, and easy to install, it ensures a reliable seal on even the most challenging junctions and penetrations.

Perfect for both new-builds and retrofit projects, Airtight Tape bonds strongly to common building substrates such as timber, concrete, brick, and membranes. Its reinforced fleece surface allows excellent plaster or paint adhesion, making it ideal for invisible integration into the building fabric.

By eliminating air leakage at key junctions, Airtight Tape helps improve energy efficiency, comfort, and building durability, making it an essential component for airtight construction and Passivhaus-standard projects.

Key Benefits:

✅ Strong adhesion – bonds to timber, brick, concrete, and membranes
✅ Fleece-backed – can be plastered or painted over seamlessly
✅ Flexible & durable – ideal for corners, joints, and penetrations
✅ Weather resistant – suitable for long-term performance
✅ Energy saving – supports airtightness targets for low-energy and Passivhaus builds

Airtight Tape is the simple, effective, and professional choice for creating a continuous airtight layer in your building envelope.

Details
Download
FAQ

Moisture-dependent SD value
Suitable for retrofit and new construction
High adhesive strength of the mounting strip on all kinds of window frames and different types of masonry base
Can be installed at low temperatures and can be plastered / painted over
Stretchable
Temperature resistance -40°C to +80°C
Shelf life 24 months, dry at room temperature and in the original packaging
Weight – approx. 350 g/m²
Thickness – approx. 0.55 mm
Fire performance – Class E, MPA*
UV stability 12 months, MPA
View our technical data sheet for more details

Technical Data Sheet

Install Guide

Safety Data Sheet

At Intelligent Membranes, we help architects, contractors, retrofitters and self-builders achieve airtightness and waterproofing targets with liquid-applied systems. Our flagship airtight system, Passive Purple®, is airtight at all times yet breathable when the building fabric needs to release vapour — we call this intelligent breathability.

Why Choose Airtight Tape?

Airtight Tape isn’t just about sealing gaps; it’s about protecting the integrity of the entire building envelope. Designed for critical junctions around windows, doors, and structural connections, it delivers long-term airtightness and weather resistance where failures most commonly occur. With aggressive self-adhesion, a variable standard deviation (SD) value and full compatibility with plastering and painting, Airtight Tape ensures airtight continuity without slowing down the installation process. Trusted on high-performance builds, it provides confidence that airtightness targets will be met and maintained for the life of the building.

Shipping & returns summary

We, at Intelligent Membranes, would like you to be 100% satisfied with your purchase and our service. In the unfortunate event of any item being unsuitable or wrong, please read the following for advice on returning goods to us.

View full details