1 / 2" X 4" FLAT, EXPANSION JOINT TEAR

Isoflex™ (formerly branded as Flat Rod) is a closed-cell polyethylene foam joint filler that is supplied with a convenient tear-off strip. When the tear–off strip is removed, it creates a void for the sealant in order to prevent surface cracking. Isoflex is available in continuous lengths in wall thicknesses of 1/4” through ½” and widths from 1” through 6”.