ConTec NC-505 is a non-corroding, chloride free accelerator and as a result will not corrode reinforcing steel or pre-stressed strands in concrete. Use of this product promotes strength development of the concrete and meets ASTM C 494 requirements as a type C admixture. Because it increases hydration speed, NC-505 offsets the effects of cold weather
ConTec NC-505 is compatible in concrete with all commercial air entraining admixtures. The amount used will depend upon the setting time of the non-admixture concrete and the temperature at placement. It may be added to the mix on the sand or in the water.