The purple spray foam is a good product that covers well on vertical surfaces as long as you keep it thin and do a second coat, I did not see 20 board feet at 1 inch thickness though. i have tried every method going through 96 cans and 2 guns learning. Advice: cover everything and wear the Tyvek suit.
Performs well.
WOW!!! they are the best! Received a sample of the new fire block, very nice and the same price. Even received a $100.00 discount. This company is the best and the product is top of the line. Love it...
The gun was defective and when engaged, leaked chemicals everywhere. I was unable to complete the project and had a big mess as a result.
Best product I have found for old home renovations