30mm white closed‑cell foam backer rod for controlling sealant depth in wider expansion and control joints. Provides an effective bond‑breaker and creates the ideal sealant profile for long‑term movement and weather resistance. Suitable for civil, commercial and façade applications across concrete, masonry and glazing. Compressible, light and easy to cut for efficient installation. For optimal performance, select a diameter 25–50% larger than the joint width to achieve proper compression.

$4.10

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