I never heard of it before. Sounds interesting though. The concern I have with any water based foam, is how long it takes to dry. If it takes too long, you could have mold starting to grow in your walls. I did not see a specification on the web site on how long it takes to dry. ( I did see on the website, a statement from Bob Villa on how quickly it will dry, but I would not be too interested in a third party opinion ).