Lb, box rockite anchoring cement, hydraulic type cement compound that is specially formulated to give it unexcelled strength & bonding qualities, mix with water, pours smoothly, sets in 15 minutes, does not shrink, within 1 hour develops compression strength of 4500 lbs per sqin, grips metal & concrete permanently, anchors bolts, posts, screws, checks, hooks, bowls, washers, railings, rods, signs, pulleys, racks, poles, seats & motors.