Profile: Plyco Corp. manufactures metal doors, windows, horse stall systems, ventilation products, reflective insulation, fasteners and closures. Our plyco service doors are pre-hung, cartoned, pre-drilled for lock set, & insulated with injected polyurethane foam, bronze or chocolate brown. Our windows include commercial thermal break, all aluminum trimline, commercial vinyl, basement, and glass block ventilators. Our products include vinyl overhead door stop, polyseal sill plate sealer and gutter hangers.