Blue can is low expansion, melted a piece of nylaflow to the supplied nozzle to reach all around. Great Stuff used to make a Yellow and Black can with precision applicator (outrageous expensive), worked well. The can was supposedly reusable for several weeks, but often would clog before the next time needing it. Have not seen round for years, then this Blue can came out, seems to be same stuff, we heated tube with a cigerette lighter and pulled it to point. Works well enough and is cheap compared to Yellow and Black can precision nozzle. Blue can is 1 time use and toss it. Might as well let any kids at heart that may be round after use make a sculpture.
