Siteworx Foam Expansion Joint Strip - 10mm x 150mm x 10m - White

Its primary purpose is to fill expansion joints in brickwork and blockwork, absorbing movement caused by temperature changes and preventing structural damage like cracking.

The strip is made from polyethylene foam, known for its low moisture absorption and good compressibility.

The tear-off strip allows for the easy and neat application of a mastic sealant directly onto the foam, creating a clean, weather-resistant seal.

While designed for brickwork and blockwork, its properties may lend themselves to other similar construction applications where controlled expansion and contraction are needed, provided dimensions are suitable.

This specific product is 10mm thick, 150mm wide, and 10 meters long. Other dimensions may be available under different product listings.

The polyethylene foam has low moisture absorption due to its closed-cell structure, but it is not fully waterproof on its own. It is designed to be used with a sealant for complete weatherproofing.

You can cut the foam strip to the required length using a sharp utility knife or a suitable cutting tool for foam materials.

Slightly dampen the edge of the foam strip or the joint opening. Ensure the joint is free from debris. If the joint is too narrow, consider if a thinner product is needed.

Ensure the tear-off strip is fully removed. Clean the foam surface with a mild detergent and water, and allow it to dry completely before applying sealant. Check sealant compatibility with polyethylene.

While the foam has low moisture absorption, if the sealant is compromised or the joint is consistently submerged, some water ingress may occur. Inspect and repair the sealant if necessary.