Expanding foam. How to reuse the nozzle?

[grungarn]

Stupid question really but I don't understand?
Can you only use a foam gun once? Because the nozzle gets full of foam and is very hard to clean? Do you buy additional nozzles or what?

 

[LAINE]

Isn't there a cap like the ones on silicone tubes you can put on? I usually tape it up right after use and that has probably worked well, I hope...

 

[andersmc]

Often it's enough to just snip off the outermost bit. But you can't save a half-filled bottle of foam sealant for any longer period. Within a few days, you'll need to use it up.

 

[Tossegubbe]

Yes, depending a bit on the brand and so on, but a few days/weeks they can manage, but at least for me not longer than that..
It's important to leave the nozzle on so that it doesn't dry in the bottle's spout..

 

[MathiasS]

Leave it untouched when you are done. The next day, take the longest screw you have and screw it into the pipe and pull out. The rest usually blows out well with compressed air. The pipe is made of thick plastic so it usually isn't too tight.

 

[MaZtoR]

Let a clump of foam dry at the tip. Then you can just break it off and continue using the tube. Doesn't it usually say to do that on the back?

 

[magnu]

Uncured foam sealant can be washed away with acetone. It can be washed out of the tube and also the top of the can where the nozzle should connect.

I believe it was acetone, in any case, it says on the can which solvent removes uncured foam sealant.