SAKRETE Concrete & Mortar Repair is a siliconized, acryliclatex, repair product used to create flexible, durable seals around concrete surfaces. Repair cracks in concrete walks, driveways, foundations, steps, blocks or mortar joints. Weatherresistant after curing. Not for use in areas of prolonged contact with water. Cracks or joints should be approximately 3.2 mm (1/8”) to 10 mm (3/8”) in width.