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B303.6 Approved Sealant Material
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Acceptable polyurethane, polysulfide and epoxy caulks and sealants shall conform with ASTM C920-87, Standard Specifications for Elastomeric Joint Sealants, and ASTM C1193-91, Standard Guide for Use of Joint Sealants. Sealant material and the method of application shall be compatible with curing compounds, admixtures and floor finishing materials; withstand light traffic; be impermeable to soil gas; and have an allowable extension and compression of at least 25 percent with 100 percent recovery. Sealants shall be applied to dried and cured concrete in accordance with manufacturers' instructions. Backer rods may be used to support sealants in cracks and joints.