Quikrete 6917-03 Expansion Joint Strip 5 ft L 4 in W 1/2 in Thick Steel Black - Pack of 40

Used where concrete meets concrete for a stronger bond. Expansion joint filler made from resilient wood to prevent damage during expansion and contraction of concrete. Used in driveways, sidewalks and patios, between concrete slabs and to separate slabs from structures. Meets requirements of ASTM D 1751.