22 oz Heavy Duty Vinyl Tarps are industrial grade and designed to last. Our heat-sealed seams are bonded using the latest technology available making these tarps 100% waterproof. Folded webbing reinforced edges provide strength and durability that include # 4 stainless steel grommets in all corners and spaced 24 inches apart. Our 22 oz vinyl coated tarps are tear, puncture, chemical, and grease resistant.