4107.01 DESCRIPTION.
Plastic film to be used for treating subgrade of concrete pavement shall be polyethylene film not less than 0.85 mils (21 µm) thick, either clear or white pigmented type. The width of strips used shall provide a lap not less than 12 inches (0.3 m) between adjacent strips. Plastic film which has been used not more than once for curing concrete pavement and has been salvaged in usable condition may be used for treatment of subgrade.