Open Cell Backing Rod 10mm x 210m, Orange Polyurethane Foam

Soft orange polyurethane foam rod, 10mm diameter on a 210 metre coil. It packs the bottom of a movement joint before the sealant is gunned in, so the bead bonds to two faces only; three-sided adhesion tears a bead apart as the joint works. The open cell structure breathes, so the sealant skins and cures faster than it does over closed cell rod. Compress it about 25 percent.