sack finish

sack rub, sack finish

A finish for formed concrete surfaces; designed to produce even texture and fill all pits and air holes; after the surface is dampened, mortar is rubbed over it; then, before it dries, a mixture of dry cement and sand is rubbed over it with a wad of burlap or a sponge-rubber float to remove surplus mortar and fill voids.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Not risking a turnover, Molnar kept the ball on the ground, trusting his defense would hold up if the offense couldn't get a first down, a decision that was validated when Delaire's sack finished off the win.