Now I have to step in because I notice here that some people don’t know how a professional gun works.
A real gun has a needle that seals the nozzle so that oxygen/air doesn't enter the tube, and in that way, it doesn’t cure inside. They don't need to be cleaned; you use the foam/glue needed and then set the gun aside. What you should NOT do is unscrew the tube and then set both aside. Then you're fucked for life, of course, and can throw the gun away.
As long as you don't have the nozzle open but screw it tight so it is closed when not in use, the gun can have foam loaded for basically as long as you want.
We at work each have our own gun, and they are used to varying degrees, and no gun has failed despite long-term storage. However, if you don't have space (the gun takes up a lot of space with the tube on), you can use the cleaning tube and rinse it clean. It doesn't hurt, so to speak.
Peter, you haven't been lucky; it works perfectly to do so.
Fsn, you are wrong. If you have a Biltema gun, you have to expect that such things can happen. If you buy a gun from Ilsbruck or Silka, it doesn't happen. But then a professional gun costs 900kr so there is definitely a difference.
However, they are worth the money every day of the week. You get full control over how much you want to apply. And you can attach any hoses you want as long as they fit over the nozzle.
However, you should leave the nozzle alone and let the foam/glue cure on the outside. Then when it's time to use it again, you scrape off the dry with a knife or brush. Then it's just rock & roll and go. =)
The tubes that should sit on the gun are special and have a different fitting, but there are bottles like the one in the picture that fit the gun but also have a disposable nozzle. However, you have to check it when buying, so you get the right tube.
/from a carpenter who knows.
