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HardMaster W670 is a high quality, easy to process, fast setting repair mortar qualified for general concrete repair that is ideal where rapid strength, durability and low shrinkage are desired.
Do not apply HardMaster W670 at sub-base or environmental temper- ature below 7°C. Temperatures above 20°C will reduce the working time. HardMaster W670 may be applied in temperatures ranging from 7°C to 32°C.
Begin water curing as soon as the surface has lost its moist sheen. Keep exposed surfaces wet for a minimum of 1 hour and maintain a continuously wet surface until the product has achieved sufficient strength. When experiencing extended setting times, due to cold temperature or the use of a retarder, longer cure times may be required.
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