the invention provides an apparatus and method which can be utilized to apply a thin layer of viscous coating material to an elongated continuously moving filament whereby the filament can be cabled , coated , and spooled in a continuous operation . the apparatus has a coating material applicator to deliver a flowable material , an air applicator to supply compressed air , a mixer to mix the flowable material and compressed air , a delivery means to spray the mixed flowable material and air onto a filament , and a coating chamber through which the filament passes . the chamber has a material collector and a coating die , and a sealing attachment with an exit hole is located beneath the coating chamber . the filament is sprayed before it travels into the material collector .