Hey guys I know this is an old forum but I just wanted to update for anyone browsing on the internet, the diy froth packs are not really the best idea. One of the biggest factors in spray foam insulation is temperatures. When I spray Foam I am constantly checking ambient air along with substrate temp and product when stored in my 55 gal drums then we regulate temp in our pumps and also in the hose to the gun itself. Each component is heated individually and if temps and pressure (which is another huge factor) get off the product will seem fine. A couple years down the road it will have a very bad odor, the only way to get rid of it is to tear all the foam out and redo in short. Long story short call a local spray foam contractor because we are set up with safety shut offs and regulators that menards kits don’t have. A local contractor will care a lot more about a job well done vs menards or any big box that’s just trying to make a buck. Also a lot of the time I’m cheaper than the diy kits…