Use sound waves to heat up your materials and weld them together with these welders, guns, and tips. They create clean spot welds in seconds. Weld plastic to itself or to other materials, such as steel. These systems don’t use direct heat, so they’re less likely to distort or discolor your weld than hot-air welding systems.

Guns are handheld and attach to your welder. Straight-grip guns activate when you press them against your workpiece. They’re good for welding on a workbench and on other horizontal surfaces. Pistol-grip guns activate with a trigger on the handle. They’re good for welding on vertical surfaces.

Tips fit into your gun. Stake welding tips weld dissimilar materials, such as plastic to steel. Spot welding tips weld plastic to itself.