Don’t do it! It sucks. I spent so much time and money and it is really difficult and the aircrete just crumbled off I spent all that time, product, and money and it was wasted. The foam generator is really expensive and making your own is difficult. I saw someone who made one on YouTube with a Harbor Freight paint sprayer. I replicated it, but it didn’t work very well. I made my own with a battery powered water pump that pumped foam water into a two way valve. On the other side of the valve, I had air from the compressor. Those both shot out into a hose that was connected to PVC pipe contraption that was used as a mixing chamber. I put steel wool in mixing chamber and then when I pressed the air… the foam would come out. It worked really well. Except the aircrete didnt like to stay on the bags. It just crumbled off. It is very brittle. I even tried to mix in some fiberglass resin… it was better but still not good. I don’t know what I did wrong but I spent the entire summer trying to figure it out and I never did. Oh and you need a high powered compressor. I got one from harbor freight but it wasn’t cheap. So… a maybe you will have better luck if you try.
