Rust-Oleum 5180 Epoxy Repair Mortar is an incredibly tough, 2 component epoxy resin mortar for repairing damaged, dished or dangerous concrete or stone floors. Rust-Oleum 5180 Epoxy Repair Mortar offers unequalled hardness and epoxy bonding power making it stronger than concrete. Its fast curing, virtually indestructible and provides a permanent repair to badly cracked and worn concrete and stone floors. It will fill holes of any shape or size, gaps, nosings, cracks etc and may be feather edged. Recommended Uses Concrete floors Stone floors Damaged concrete Damaged bay edges Broken steps Filling holes and gaps Surface Preparation Concrete and stone surfaces should be dry and free from previous coatings, contaminants and loose material and at least four weeks old. Very smooth concrete or concrete with soft laitance should be etched with Rust-Oleum Mathys 108 Surfa Etch Solution. Grease or oil should be removed with Rust-Oleum Mathys ND14 Cleaner Degreaser and the area thoroughly washed