Backer Rod is perfect for various 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. suitable for most kinds of cracks, such as pavement cracks, wall joints, and cracks in planks. It can also be used for crafts, DIY projects, packaging, flower art, etc. SpecificationColor: BlackMaterial: Expandable PolyethyleneOuter Diameter: 50 mm / 1-31/32 inchTotal Length: 2 m / 6.56 FeetPackage List: 1 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.