That is some Amazing Stuff Ross, it only takes One Minute for it to blow up from the time ya start mixing, it's swelled up to 16 to 1 in about 3 minutes and it's set up hard in about 10 minutes, fully cured in 30 /45 minutes, takes a hammer to break a piece the size of a brick. The stuff weighs about 1 1/2 pounds a cubuc foot when it's cured.
I'm just learning how to use this stuff, using Jerry's boat for a training post .. LOL