Jumbolene® Sealant backer rods are made of closed cell polyethylene foam and used in expansion and contraction joints to minimize the depth and amount of the sealant used. It provides a reliable backfill on building joints and this is characterized through its excellent compatibility with all standard sealing materials. It is used for vertical and horizontal joints in interiors and exteriors.
It is also used for sealing gaps in internal wall joints, windows and draft proofing.
It is also used together with expansion joint filler to fill expansion gaps.