Description Manuals Videos Articles Popular Accessories Clemco Poly Covers help keep contaminants from entering the blast machine. Moisture interferes with most blast media and cause blockages in the blast machine valves and plumbing. Poly, All-Weather, 45 x 54. Product Info Customers Also Viewed Clemco Poly All-Weather Cover, Large #15143 $0.00 Clemco Blast Machine Cover, 24 inch Diameter #02336 $188.06 Clemco Supa Blast Hose w/ Coupler & Holder, 5… #23480 $281.85