havent heard of it and dont care for 2 reasons: fentanyl and its derivates arent pleasureable and VERY fkn dangerous, and 2) no vendor is going to ship this shit to the USA due to analog laws, so even if I were interested, I couldnt try it. That, and without potentcy being established relative to fentanyl (or other opiates), your first shot could very well be your last. I may be crazy, but Im not insane.
as far as superglue like characteristics, Exalgos will practically weld shit together once wetted and dried, but I figured as long as it stays wet, im ok. i.e., maybe (probably not) safe to shoot, but in NO way safe to insufflate or smoke. Eat, plug, or inject. Id REALLY hate to find out thehard way Ive injected (or even ingested) something that hardens like glue.