Which are the best types of Heat Sealers?

Choosing the best type of sealer depends on your product, the packaging material you are using, your output requirements and your budget. Below we highlight the strengths of the main types of heat sealers and when they are most suitable.

1. Impulse Sealers

Impulse sealers are heat sealers that use a short burst of heat to create a bond between thermoplastic films. They are simple to use and ideal for low to medium usage environments, such as small production runs or occasional sealing tasks.

Best for: Small volumes, light duty, simple bag sealing tasks.

Advantages: Low cost, easy to operate, low energy use.

Considerations: Not suitable for high output or thicker materials without the right model.

2. Constant Heat (Direct Heat) Sealers

Constant heat sealers maintain a set temperature at the seal bar, creating a consistent seal on a variety of materials. These are well suited to thicker films and foil based materials that need a stable, controlled sealing temperature.

Best for: Medium duty and thicker packaging materials.

Advantages: Reliable seals, good for foil and laminated materials.

Considerations: Higher energy use than impulse sealers.

3. Band Sealers

Band sealers use a continuous heated band to create seals on bags as they pass through the machine. They are good for higher production rates and consistent sealing quality.

Best for: Medium to high volume operations.

Advantages: Faster throughput, consistent seals.

Considerations: Requires operator feed or automation.

4. Vacuum Sealers

Vacuum sealers remove air from the package before sealing, extending shelf life for many food products and preventing oxidation. They are available in chamber and external/probe styles to suit different packaging formats.

Best for: Food packaging, products sensitive to oxygen or moisture.

Advantages: Longer shelf life, protection from environment.

Considerations: Investment cost varies by type and capacity.

5. Impulse with Gas Flush

Some impulse sealers can be fitted with gas flush systems to introduce inert gases (like nitrogen) before sealing. This offers improved product protection and extended freshness in sealed bags.

Best for: Perishable goods, products sensitive to oxygen.

Advantages: Enhanced shelf life, better product presentation.

Considerations: Additional cost and setup compared with standard impulse sealers.

Summary

Each type of sealer has its place — from simple impulse sealers for low usage up to vacuum systems for specialised product protection. Choose based on your material, output demand, and budget to get the strongest seals and the best value.