Wiktionary
vb. (context transitive English) To enclose (something) in plastic wrapping and make an airtight seal by applying heat to fuse the edges of the wrapping together.
Usage examples of "heat-seal".
La Cucaracha was his own, and he kept half the crew busy opening the heat-sealed jets, doing jury-rig repairs, and making the vessel comparatively spaceworthy.
Because we got a request from Diagnostics for ten more drive units to be sent in heat-sealed plastic bags.
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.
Randy rotates the box ninety degrees and holds it between his knees so its long axis is pointed at the television set, then grips the top of the sac and carefully parts its heat-sealed seam, which purrs as it gives way.
Beneath a litter of ruffled shirts, a shaving kit, and cans of hair spray, the trunk was packed to the gills with electronic contraband: coax cables, multiplexers, buffers and converters, shiny plug-in cards still in their heat-sealed baggies, multiplugged surge suppressors wrapped in tentacles of black extension cord.