Please do not use the new formula 3m77 on your cores!!!! It's got a higher amount of acetone in it,,,,,,,, ever see what happens to foam when you put acetone on it? Can you say "melt"?,,,,

Anyways,,, the new version is in a purple can,,, the old one is all black,,,,if you see any of the older stuff at Lowe's,, Home Depot, etc,, pick yourelf up a few cans, as it's by far the best stuff out there ofr sheeting wing cores,, or building Zagies!!!! ( I've built about 65 of them!!!!)

John
aka "Murphy"