Airtight Tape – 75-100-150 & 200mm widths available

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The very best air tightness tape for windows and connecting joints. Polyamide film covered on one side with non-woven for outside and inside sealing of window connection joints with adhesive coating and 20mm cornering flange.

The tape consists of modified polyamide with a fleece-film combination. The tape is composed of four layers and has a variable sd value. The aggressive self-adhesion of the full underside makes the tape very easy to install in completely hidden position in which it can be plastered and painted over without leaving adhesive marks on the masonry. Besides, a version with additional self-adhesive cover on the upper surface is available.

This 25m airtight tape is available in 4 width sizes:

75mm airtight tape from £40.00
100mm airtight tape from £50.00
150mm airtight tape from £75.00
200mm airtight tape from £100.00

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  • Key Details
    • Moisture-depending 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 temperature 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
  • Data Sheets & Certificates
  • Architects Specification

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  • Delivery

    All delivery charges are included in the price of the products and are dependent on the products selected for purchase. This charge is based on delivery to mainland UK, excluding the Scottish Highlands & the Islands where additional shipping charges will apply. For more information read our delivery policy in full.

    Intelligent Membranes do not offer a next day delivery service.

    Intelligent Membranes aim for deliveries to be with the customer within 2 working days. During the festive period deliveries could take longer.

    Orders placed before 12pm will be dispatched the same day, any orders placed after 12pm will be dispatched the following working day

  • Returns

    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 our returns policy in full.


Airtight tapes in Stock * Various Sizes to Choose From * Bulk Buy Options Available.
When it comes to making a structure airtight, it is fundamentally important to ensure all gaps are covered so air can’t escape. Any gaps or holes that aren’t filled cause a reduction in energy performance, increasing energy bills and reducing the comfort levels of your property.

Our range of airtight tapes are a crucial component in your energy saving armoury, adding an extra layer of airtight security and at the same time, promoting Passivhaus standards.

How Do Airtight Tapes Work?

Our Airtight tapes create a durable, airtight seal and can be added after the application of an airtightness substrate.
Adam White, CEO and Founder Intelligent Membranes: “Our Airtight Tapes form a second layer of defence, guaranteeing an airtight seal. They can span any large gap, so if there’s any gap that’s too big for the product to go into, the tape can be used as a bridging mechanism, before painting over with a vapour control membrane like Passive Purple.”

Here at Intelligent Membranes, you can find the best in airtightness tape for windows. Airtightness tape is used around your windows to create a durable seal, which helps maintain thermal performance. Without this, your window could be letting air and in turn energy escape.

All of our products are designed with the environment in mind and formulated following eco-conscious practices. Our customers can buy with confidence, secure in the knowledge that they are doing their bit for the planet. We want to modernise the construction industry and you can be a part of it today with our airtightness tape for windows.

Compatible with the whole Intelligent Membranes range, our tapes are effective with both liquid-applied membranes and plasters. This airtight fleece tape provides extra adhesiveness to make our products suitable for all surfaces. You can be sure our airtightness tapes are made for durability and will last the full life cycle of your building.

Browse the Intelligent Membranes products today or contact our team for more information.

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