
Expanding foam tape is a versatile and essential tool in various industries. It's available in different widths and densities to suit specific applications.
One of the key advantages of expanding foam tape is its ability to seal gaps and cracks in a variety of materials, including metal, wood, and drywall. This is due to its unique foam structure that expands to fill the gaps.
Expanding foam tape is also resistant to water, air, and sound, making it an excellent choice for applications where moisture or soundproofing is a concern. Its adhesive properties ensure a strong bond with the surrounding surface.
In construction, expanding foam tape is often used to seal gaps around windows, doors, and electrical outlets. This helps to prevent air leaks and reduce energy bills.
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What is Expanding Foam Tape
Expanding foam tape is a type of adhesive tape that expands when exposed to air, allowing it to fill gaps and seal surfaces.

It's commonly used in construction, DIY projects, and even in the automotive industry to seal gaps and joints.
The foam tape is usually made from a mixture of polyethylene and polypropylene, which gives it its unique expanding properties.
This type of tape is also known for its ability to provide a strong seal, even in areas where moisture is present.
Description
Expanding foam tape is a type of sealant that can be a game-changer for DIY projects and professional construction. It's a clean and easy application alternative to polyurethane aerosol foam.
This type of foam tape is ideal for installing windows and door frames, as well as joining structural elements in residential and commercial construction. It's also suitable for DIY use.
Xpanda 600, a specific type of expanding foam tape, is heavily impregnated with chemically stabilized acrylics, giving it flame retardant properties. This means it's a safe choice for various applications.
One of the key benefits of expanding foam tape is its ability to self-adjust after installation to keep gaps closed. This is particularly useful in climates with seasonal changes and noticeable expansion and contraction in joints.

The performance of Xpanda 600 is rated at 600 Pascals, or driving rain, at 25 per cent decompression. This indicates its effectiveness in sealing gaps and preventing water intrusion.
Here's a summary of the key benefits of expanding foam tape:
- Self-adjusts to keep gaps closed
- Provides long-term thermal and acoustic insulation
- Has high UV resistance
- Prevents mildew accumulation through sufficient joint ventilation
Walther Strong 10mm
The Walther Strong 10mm expanding foam tape is a premium quality product. It's made from open-cell polyurethane foam, which is perfect for preventing mildew and driving rain protection.
This tape is permanently elastic and self-adjusting, making it easy to use and ensuring a tight seal. It's also UV stable and weatherproof, so you can use it in a variety of outdoor applications.
The Walther Strong 10mm expanding foam tape comes in a 4.6m length and is 10mm thick. It's available in black, which makes it easy to blend in with most surfaces.
Here are some key features of the Walther Strong 10mm expanding foam tape:
- Permanently elastic
- Self-adjusting
- Premium quality open-cell polyurethane foam
- UV stable & weather proof
- Expands between 5 – 35mm
Key Features and Certifications
EXP 6 is a BBA Approved sealing foam tape that provides a permanently elastic weather seal to protect against wind driven rain to 600 Pa.
It is pre-compressed and impregnated with a fire resistant polymeric dispersion, making it a reliable choice for building joints.
This expanding foam tape is specially designed for joints in buildings up to 100 m high, in accordance with DIN 18055.
It also meets the stringent requirements of the DIN 18542 edition 2009, providing protection against driving rain to a minimum of 600 Pa.
The vapour permeable joint sealing tape allows for diurnal movement, making it suitable for buildings that experience temperature fluctuations.
It possesses outstanding thermal and acoustic characteristics, ensuring it can handle various environmental conditions.
Uses and Benefits
Expanding foam tape is a versatile and essential tool for various construction projects. It's a self-adhesive foam tape that can be used for sealing construction joints in different areas.
Door and window installations rely heavily on expanding foam tape to ensure a tight seal and prevent air leaks. In fact, it's often used in prefabricated concrete construction to fill gaps and provide a smooth surface.
The tape is also commonly used in perimeter seals for fenestration, including windows and doors, to prevent water and air infiltration. Additionally, it's used in skylights, cladding panels, curtain walling, and steel and/or timber framed buildings.
Here's a breakdown of some of the key areas where expanding foam tape is used:
- Door & Window Installations
- Prefabricated Concrete
- Perimeter Seals for Fenestration (windows/doors)
- Skylights
- Cladding Panels
- Curtain Walling
- Steel and/or Timber Framed Buildings
- Modular Construction
Applications
EXP 6 is a versatile, self-adhesive foam tape that's widely used for sealing construction joints in various areas.
Door and window installations are a common application for EXP 6, as it helps to prevent air leaks and moisture intrusion.
Prefabricated concrete is another area where EXP 6 is often used to seal joints and prevent damage.
Perimeter seals for fenestration, including windows and doors, are also a key use for EXP 6.
Skylights, cladding panels, and curtain walling are just a few examples of other areas where EXP 6 is used to seal joints and prevent air leaks.
Steel and timber framed buildings, as well as modular construction, also rely on EXP 6 for sealing construction joints.
Here are some specific areas where EXP 6 is commonly used:
- Door & Window Installations
- Prefabricated Concrete
- Perimeter Seals for Fenestration (windows/doors)
- Skylights
- Cladding Panels
- Curtain Walling
- Steel and/or Timber Framed Buildings
- Modular Construction
Exp 6 Advantages

The EXP 6 seal is a reliable choice for various construction projects, thanks to its many advantages. One of its key benefits is that it complies with DIN 18542 BG 1 and DIN 18055 standards.
It can seal joints of various sizes, ranging from 1mm to 42mm, with a pressure of up to 600pa. This makes it suitable for different types of construction projects.
The EXP 6 seal is also effective against wind, dust, and driving rain, providing a secure barrier against the elements.
One of its notable features is that it allows for vapour diffusion, which is essential for maintaining a healthy indoor environment.
The seal has a strong adhesive on one side, making it easy to apply and ensuring a tight seal.
Its permanently elastic properties guarantee a long-term life expectancy, reducing the need for frequent replacements.
The EXP 6 seal also provides thermal and acoustic insulation, helping to reduce energy consumption and noise levels.

It can be painted with standard emulsion paints, allowing for a seamless integration with the surrounding environment.
The EXP 6 seal is compatible with all known standard building materials, making it a versatile choice for various construction projects.
It is CE-certified and has a 10-year performance guarantee, providing peace of mind for builders and homeowners alike.
Here is a summary of the EXP 6 seal's key features:
Frequently Asked Questions
How long does expanding foam tape take to expand?
Expansion of foam tape begins immediately after unwinding from the roll, as the compression is released. The exact expansion time may vary depending on the specific product and environmental conditions.
Sources
- https://qualitape.co.uk/product/xpanda-5mm-26mm-expanding-foam-tape-5-6-metre-rolls/
- https://www.obexglobal.com/uk/products/specialist-tapes/obex-cortex-expanding-foam-tape/
- https://www.eurocell.co.uk/silicones-adhesives-and-cleaners/adhesives/ws-selfex-33546-10-walther-strong-self-expanding-10mm-foam-tape-4-6m
- https://lynvale.co.uk/expanding-foam-tape/
- https://www.frostking.com/products/weatherstripping/expandable-foam-weatherseal
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