The Febspeed is a chlorine free liquid admixture formulated to accelerate the setting time or cement based mortar, non-reinforced concrete, renders & screeds. The Febspeed from Everbuild also provides frost protection in the wet mortar during the setting period, even in sub-zero temperatures & can also be used neat with cement as a plugging aid it is tested to the requirements of EN 934-3:2009 +A1 (2012).