Rust-Oleum 51750 Restore Crack Filler with 10-ounce Tube This product adds a great value Fills cracks up to 3/8 inch Durable, flexible, and paintable This product adds a great value Durable, flexible, and paintable For use on both wood and concrete Fills cracks up to 3/8 For use on both wood and concrete Fills cracks up to 3/8 Durable, flexible and waterproof Simply gun it into the cracks, wipe away the excess and let it dry.