Wiktionary
heat-sealing
vb. (present participle of heat-seal English)
Usage examples of "heat-sealing".
When it peeled off, he realized the company had, for years, been printing their own fake labels, heat-sealing them over the actual weight printed on the box, and cheating him out of a few ounces of shrimp every 5 pounds.
There was a delicate trick with the heat-sealing substance that caused it to regain its former decorative pattern.