21200-96596 3M Concrete Patch Compound,Self-Leveling Concrete repair 600 Please log in to see price or purchase this item Quantity discounts available QuantityPrice SKU: MMM2120096596 Qty On Cart Features 3M Concrete Repair 600 is a gray, self-leveling two-component polyurethane that is provided in a standard caulk tube. Features Back Features3M Concrete Repair 600 is a gray, self-leveling two-component polyurethane that is provided in a standard caulk tube.