A secure case seal does more than close a box—it helps protect your products, your shipments, and your reputation. When cases aren’t sealed consistently, products are more likely to shift, become damaged, or even be lost before they reach the customer. Inconsistent sealing is also one of the most overlooked and most fixable causes of shipping damage and lost freight, and it costs manufacturers real money in replacements, returns, and customer trust.
Hamrick Packaging Systems offers modern automatic case sealers that help eliminate these issues by creating reliable, repeatable seals on every package.
What’s Actually Causing Inconsistent Seals?
According to a 2025 survey roughly 3–4% of U.S. shipments arrive damaged, and industry estimates put the resulting losses and claims near $4 billion a year. A lot of those traces back to inconsistent sealing such as worn tape heads, hand-folded flaps, or adhesive that isn’t set to the right temperature.
Why Consistent Case Sealing Matters
A properly sealed case improves the overall strength and performance of your packaging. Consistent flap folding and adhesive application help create a secure package that can better withstand shipping and handling.
Reliable case sealing means every carton gets the same tape or adhesive application, every time. That consistency delivers:
- Better product protection during shipping
- Improved pallet stability
- Fewer damaged shipments and returns
- Reduced risk of product loss or theft
- A more professional appearance for customers
Many of our clients have reduced product damage by improving the quality and consistency of their case seals. Properly sealed cases help keep products secure during shipping and handling, reducing the risk of damaged shipments and returns.
Our clients in the apparel industry have also seen the added benefit of improved security, as properly sealed cases help make packages more difficult to open or tamper with during transit.
Common Problems with Older or Manual Equipment
Plants that rely on manual or outdated case sealers often face inconsistent results. Manual systems require a human operator to stand at the machine and fold the top flaps by hand before sealing, which can slow production, introduce variations from one case to the next, and lead to unplanned packaging line downtime when a bad seal is caught late.
Our fully automatic case sealers eliminate this manual step by automatically folding the flaps before applying tape or adhesive. These machines also handle heavy-duty, double-wall corrugated cases easily, making them well-suited for demanding packaging applications.
Keep Your Case Sealer Performing Its Best
Routine maintenance helps ensure consistent seals and minimizes unexpected downtime. A few simple practices can make a big difference.
For tape sealers:
- Keep adhesive buildup off the tape head blade by adding a few drops of oil to the blade guard pad
- Vacuum or blow away accumulated cardboard dust
- Replace dull blades to maintain clean, reliable tape cuts
For hot melt glue sealers:
- Use a high-quality adhesive that won’t char in the glue pot
- Program the melter to turn off when the system isn’t in use
- Regularly inspect and maintain glue hoses and nozzles
For maintenance and troubleshooting guidance by machine type, see our Case Sealers FAQ.
Find the Right Case Sealing Solution
The right case sealer improves package quality, protects products, and helps your packaging line run more efficiently. Whether you’re replacing manual equipment or upgrading an existing system, we can help you find a solution that fits your production requirements. If you’re ready to compare tape, hot-melt, and hybrid options, see our guide to Choosing the Right Case Sealer for Your Packaging Line.
If you would like to learn more about our automatic case sealing solutions and how they can improve the performance of your packaging operation contact Hamrick for more information.