Our Backer Rod is perfect for a wide range of applications, including construction, plumbing, and automotive projects. It effectively fills gaps and joints, preventing the infiltration of air, water, and dust, ensuring a tight and long-lasting seal. It can also be used for craft DIY, packaging, flower art, etc.SpecificationMaterial: Expandable PolyethyleneOuter Diameter: 4mm / 1/8 inchTotal Length: 290m / 317 YardPackage List: 1 Roll x Backer RodAdvantageOur Backer Rod is made from expandable polyethylene material that provides excellent resistance to water, It is also flexible, lightweight and easy to install, making it a good solution for sealing gaps and joints.InstructionSimply insert it into gaps and joints to create a firm and stable foundation for sealants.