Heavy-Duty Impulse Sealers In UgandaWhat Is a Heavy Duty Impulse Sealer? A heavy duty impulse sealer is a manual sealing machine designed to create strong, airtight seals on thermoplastic materials such as polyethylene (PE) and polypropylene (PP) bags. Unlike constant heat sealers, impulse sealers apply heat only when the sealing bar is pressed down, ensuring energy efficiency and preventing overheating. These machines are ideal for sealing thick or multi layered packaging materials