In industrial use, hot melt adhesives provide several advantages over solvent-based adhesives. volatile organic compound are reduced or eliminated, and the drying or curing step is eliminated. Hot melt glue gun have long shelf life and usually can be disposed of without special precautions. Some of the disadvantages involve thermal load of the substrate, limiting use to substrates not sensitive to higher temperatures, and loss of bond strength at higher temperatures,
The gun uses a continuous-duty heating element to melt the plastic glue, which the user pushes through the gun either with a mechanical trigger mechanism on the gun, or with direct finger pressure. The glue squeezed out of the heated nozzle is initially hot enough to burn and even blister skin.