QUIKRETE® Expansion Joint Strips (No. 6917) are made from resilient wood fibers to prevent damage during expansion and contraction of concrete. Weather resistant. Meets requirement of ASTM D 1751. 1/2 inch x 4 inches x 5 feet. QUIKRETE Concrete Expansion Joint Strips can be used in all standard concrete construction, such as highways, runways, parking garages, driveways, sidewalks, and floor slabs. Concrete Expansion Joint Strips can also be used as a buffer between dissimilar materials such as columns, manhole covers, and adjacent constructions. Meets ASTM D 1752* and D 4819 Type II