Closed-cell polyethylene foam expansion joint filler: ASTM D1056 Type 2, Class A. Sizes: 1/4, 3/8, 1/2, 3/4, 1 in thick x various widths. Uses: isolation joints between slab and foundation wall, column pads, control joint filler, pavement expansion joints. Placed before concrete pour at all locations where concrete meets dissimilar materials or where movement is expected. Coverage: full depth of slab at perimeter. Also: fiber expansion joint (ASTM D1751) for pavements — asphalt-impregnated fiber, compressible. Backer rod: closed-cell polyethylene foam rod (ASTM D5249) placed in sealant joints, 25-50% larger than joint width. Sealant over backer rod for weather seal. Cost: $0.10-$0.50/lf depending on size. CSI 03 15 13.