Originally Posted by sproutroot
I bought a DIY spray foam insulation kit, and I'm wondering if anyone has any tips or tricks they found successful for keeping the nozzle clean after use. I've read that this is the issue that makes these kits a one-time-use item; but I don't want to have to do the entire bus in one headlong rush, and I'm not one to accept defeat easily.
My dad thought that perhaps you could jam pipe cleaners into the nozzle right after use to keep it from clogging. I thought maybe cleaning it with acetone while the foam is still wet would work.
Has anyone had success trying something like this?
I asked this question last year, and I finally got around to testing it today. My answer is acetone.
I found that when I was done spraying the foam I could remove the nozzle and toss it in a shot glass full of acetone. After a few minutes I took it out, popped out the mixer insert, and was able to scrub it clean with a wire brush (picture is after scrubbing). This relieves a lot of the pressure of doing the whole job at one time, although you're still supposed to use the whole kit up within 30 days of initial use.
The product I bought is called Foam It Green, and I'm using it as an adhesive layer behind my board insulation. I'm attempting to spray a very light layer of foam and then press board insulation into it. I'm hoping this will fill in all the air gaps, seal the exterior, and be a lot cheaper than a full spray foam job. That being said, it's significantly more work than just spraying foam in.
There is definitely a bit of a learning curve to the application. The foam sprays and dries very quickly, so not only will it require two people to perform my plan, but the sprayperson will need to be pretty adept so as not to overspray and waste the foam. The quick drying will also limit the size of the boards I can use, although that's not such a big deal.