Rockite 10005 Expansion Cement, Powder, White, 1 hr Curing, 5 lb Box

Rockite is a fast-setting, hydraulic expansion cement. Mixes with water, initially sets within 15 min and within 1 hr sets stronger than concrete. Great for patching concrete and brick and anchoring bolts, screws, balustrades, gates, fencing, railings and more.