Levi’s Building Components Standing Seam Backer Rod is a flexible, extruded closed cell foam product that is n5/8″ diameter and comes with an adhesive backing. Many installers use backer rod to help prevent oil canning of standing seam metal roof panels. Our Standing Seam Backer Rod is an innovative product that comes with an adhesive backing which provides installers with a time saving way to apply backer rod to standing seam panels. The backer rod can be trimmed to the precise size needed for your upcoming standing seam metal roofing project.   • Closed-Cell Foam • Helps Minimize Oil Canning • Relieves Internal Stresses & Waviness • Self-Adhesive Release Paper • Easy to Install