Pistola de espuma en aerosol

I have been around spray foam for many years. commercial and residential jobs. Filling voids around windows to complete insulation jobs. Watched there video, and followed there instructions. First can i opened simply did not spray well, even though I shock thuraly. it came out thin and some what clear. I decided it was simply a bad can. After that I took the other 5 cans shook for a full 2 min, set them aside, put a new tip on the gun, you must buy there gun, there tips will not work on other brands of guns, I had 2 different ones in my trailer and neither one worked. I would then grab one of the cans shake for at least 1 min then put it on the gun. I sprayed water on the surface and then started spraying foam, as directed. however in the end I used one can with out dampening the surface and could not tell any difference, in coverage or how the foam set. You need enough clear area to spray using a sweeping motion at least 12" away from the wall.. I had purchased a case of foam to 1, try the product, and 2, insulate the rim joist area in my new home. Trying to maneuver the gun and can in confined area around floor trusses simply dose not work well. I would suggest going back to the froth pack. The other thing you need to keep in mind is that when you make a pass keep moving, do not spray back over an uncured area. You can go back over it after it sets up, to add more thickness, or fill in holes. The other thing is I was not able to get the coverage they talk about. Maybe you can get the 20BF per can under perfect conditions, I was only getting about half of that. So figuring according when planning a project. I think this product would work well for a patch, when remodeling, or to insulate a small area when framing a house that would not be accessible to insulate at a later date. It works, but not maybe as well as I would like.