Reduce Waster, Mess And Time Valco Cincinnati introduces their new Pneumatic Boltcoater™ that is designed to apply Hylomar® sealant on bolts, studs, etc. It can be used as a thread sealant, gasket maker (gaps to 0.010 inches), or gasket adhesive/dressing. The Pneumatic Boltcoater™ is a self-contained unit driven by air pressure capable of coating up to 1,200 bolts per Hylomar® cartridge. (This is dependent on bolt diameter and number of threads coated.) Each cycle on a + inch bolt takes as little as two seconds.