Glue guns are available in low temperature and high temperature hot-melt versions. Low temperature units heat up to about 120º C and are more suitable where a high temperature is not wanted. High-temperature units} heat up to about 195°C and produce a stronger bond. Also available are dual glue guns which include a switch so that both low and high temperatures can be used for different purposes.
For industrial applications, there are a wide range of heavy duty glue guns available which are designed and constructed to optimise production efficiency. These range from high output pneumatic glue guns to variable temperature units.
Glue sticks are available in various sizes for different varieties and sizes of glue guns. The commonest size has a diameter of 11mm. Glue sticks are also available in various lengths, from about 10cm upwards. However, the majority of glue guns will accommodate glue sticks of any length. Hot melt and low temperature glue sticks are available for the different types of glue gun. Hot melt adhesives do not contain any solvents or water. They set when they decrease in temperature and this means that they can set quickly.
For industrial needs, different types of glue sticks are available for specialist uses. The commonest diameters are 12 and 43mm. For domestic use, there are only a few types of glue sticks that are available. Glue sticks have different open times, which is the time taken to form a bond. This varies from a few seconds to several minutes.
Glue guns should be switched on a few minutes before being used so that the heating element and glue stick can warm up. As the glue stick gets hot it melts and then it can be used to glue different materials together. Care should be taken when using hot glue guns as hot glue can be hazardous.