Which material is not typically used with a soldering gun?

A soldering gun is primarily used for joining metals through the process of soldering, which involves heating a filler metal to create a bond. Metals are the most common materials used with a soldering gun, as the heat generated is ideal for melting solder and fusing metal components together.

Wood and plastic can sometimes be associated with soldering guns, but not in the same way as metals. Wood may be used as a work surface or to hold components, while soldering can be employed in certain applications involving electronic components on printed circuit boards where plastic is present. However, the appropriateness of using a soldering gun with these materials is limited compared to metals.

Concrete, on the other hand, is a rigid and heat-resistant substance that cannot be effectively joined using a soldering process. The high temperatures from a soldering gun would not only be ineffective in bonding concrete but could also cause damage to the soldering tool itself. Thus, concrete stands out as a material that is not compatible with the typical uses of a soldering gun.