Burlap is an absorbent cover for curing concrete which allows periodic lapses in the sprinkling method of curing. Burlap should be rinsed thoroughly before placing. Care should be taken to ensure proper lapping and that all concrete edges are covered. Keep continuously wet. Burlap may also be used to roughen fresh concrete surfaces by wet dragging. Foster Supply inventories 7oz Blankets that come in 6' X 300' rolls.