I've used about half a dozen different foam guns, including much more expensive ones, and this is my favorite. Works very well and can last a year or more with proper care. Each foam gun is a massive improvement over a straw applicator can, much easier and cleaner to apply, and much cheaper if you're sealing a lot of air. Any foam gun will eventually clog, but here are a few tips to prolong its life: Always keep a can of foam on the gun if you use it regularly. If you don't use the gun for more than a week, spray some foam. 1 x per week for 5-10 seconds through the barrel into the garbage can, so that the foam in the barrel does not harden - DO NOT clean the weapon regularly with acetone! This is a common mistake that will greatly reduce the lifespan of your weapon. The best way to clean a foam gun is to flush it with lots of foam! You should only rinse with acetone if you have not used it for a long time (see below) - If you do not use the gun for a long time, you can remove the (empty) foam can and rinse out the cleaner with acetone. Spray the acetone until clear, then let the gun sit with the acetone can for 10 minutes to break up the deposits, then flush again until clear. The gun is now safe to "dry" storage - have a piece of cardboard handy when using the foam gun. Immediately after using the gun, scrape the tip on the cardboard. Scratching it on a 2x4 bare wood (if you're working in an attic for example) also works well. This keeps the tip clean so it doesn't clog the next time you use it. If you let the foam on the tip harden, you'll need to clean it up with acetone and/or a utility knife. The knife works well, but you end up scraping off bits of metal that wear the gun down prematurely.
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