HARDCRETE 620 is a cementitious pre-packed repair mortar specially designed for resurfacing, patching, and repairing large areas of concrete. It is supplied as a single component powder that only needs mixing with a specific quantity of water to produce a non-shrink and rapid strength-gain mortar. It is a blend of special cement, special fillers, and modifying additives to control the rate of setting and strength gain plus hardwearing aggregates. The cured mortar is durable and weather resistant and is ideal for use in heavily trafficked areas where a rapid return to service in 2 – 3 hours is critical.