For professional installers, the FoamGun is available separately and recommended for use. It can be used multiple times, and its Teflon-coated interior makes it easy to clean after each use. You can also use the trigger to control the flow. The FoamGun allows you to use the spray only when required, so you don't have to use the entire can at once and can save the rest for another job. To work correctly, the can must be upside down..