The 12" Thermo Impulse Sealer is able to quickly and uniformly seal polyethylene, saran, nylon, polyvinylchloride, polypropylene, pliofilm, kel-f, mylar, polyflex, polyurethane, and polyvinyl alcohol. This product does not require a warm-up and can be used instantly. It is an efficient product and can produce 1000 seals per day.