Armacell Tundra Foam 5/8" Open Cell Backer Rod 500'/Bag

5/8" x 500', Polyurethane Foam, Open Cell, Flexible, FillPro® Sealant Backer Rod

FillPro® Open Cell Backer Rod (formerly Tundra Foam) is a pliable open-cell polyurethane foam material used for filling irregular joints. It is chemically inert and will resist oil, gasoline and most other solvents. The material will not stain, or adversely adhere to sealant or caulking materials.