Add in low temperatures.
Use only with Rapid Set® cement products.
Add to concrete, mortar or grout.
FAST is an additive that speeds up the setting time of Rapid Set® cement products when experiencing extreme cold weather environments. Add 1 to 5 packets per 50-lb to 70-lb bag of Rapid Set cement product. Fast may be used with all other Rapid Set® Concrete Pharmacy® products.