40mm x 100m Backer Rod

Diameter: 40 mm; Length: 100 m; Material: closed-cell polyethylene foam; Non-absorbent and compressible; UV and chemical resistant; lightweight and easy to install; designed for concrete crack repairs and expansion joints.

The 40mm x 100m option is ideal for larger joints and longer runs. For smaller joints or shorter projects, consider the 20mm x 100m backer rod or the 40mm x 50m variant for shorter lengths. See examples below: 20mm x 100m: https://fepy.com/product/20mm-x-100m-backer-rod; 40mm x 50m: https://fepy.com/product/40mm-x-50m-backer-rod. The 30mm x 100m option is another mid-range diameter: https://fepy.com/product/30mm-x-100m-backer-rod.

Use it to fill large joints before applying elastomeric sealants in concrete structures. It serves as backing for caulking, enables proper sealant expansion during curing, and is suitable for joints in driveways, walls, foundations, pools, and bridges.

1) Ensure the joint is clean and dry. 2) Cut the rod to fit the joint length. 3) Compress the rod to the joint width and insert it so it sits below the surface of the joint. 4) Leave space for the sealant on top and apply the appropriate elastomeric sealant over the backer rod. 5) Allow the sealant to cure according to its instructions. The rod remains in place as a backing for the caulk.

This backer rod is designed to be used with elastomeric sealants such as silicone or polyurethane caulks. The rod provides a stable backing that prevents adhesive bonding to the joint base and helps achieve a durable, long-lasting seal.

The product is a foam backing material and is generally non-hazardous for normal handling. Use standard safety practices: wear gloves when cutting to avoid skin irritation, work in a well-ventilated area, and keep away from open flames since it is a foam material. Store in a cool, dry place away from direct sunlight to prevent deformation.

Backer rods are typically considered a one-time-use filler that stays in place as part of the joint, serving as a backing for the sealant. If a joint is reconfigured, you may replace the backer rod accordingly.

Fepy generally supports returns on eligible items within the standard policy for unused products in original packaging. Check the specific return terms for your order and region to confirm eligibility and timeframes.

Store the roll in its original packaging in a cool, dry place. Keep it away from direct sunlight and avoid placing heavy weights on the roll to prevent deformation. Ensure the joint area is clean and dry before installation.

This option provides a long 100 m roll, reducing the need for frequent replacements on large projects. The 40 mm diameter is suited for wide joints, and the closed-cell polyethylene offers durability, non-absorbency, UV resistance, and chemical resistance, making it a reliable backing for caulk in demanding environments.