Sidewalks and driveway aprons shall be cured by one of the following methods:
1. Burlap shall be placed on the finished surface, saturated with water and covered with an impermeable covering.
2. Polyethylene sheeting shall be placed as soon as the concrete has sufficiently hardened to prevent marring of the surface. The surface of the concrete shall be wet immediately before the sheeting is placed. The edges of the sheeting shall be weighted securely with a continuous windrow of earth or any other means satisfactory to the Building Department to provide an air tight cover.
3. Specified curing compound shall be applied with brush, roller, or spray at the rate of one (1) gallon for every two hundred fifty (250) square feet of surface. Any of the above curing methods must remain in place for not less than six (6) days.