The adhesive itself is OK, has glued together in my case, polypropylene (PP). On PP30GF (polypropylene, fiberglass reinforced) he fails, however, a pity. But what has most disturbed me, even after the first application, the cannula was glued on the tube and the adhesive could no longer be push out. Tried to get them free with a needle. While this seems to work, but the needle stuck while trying to glue squeeze out within the fraction of a second. So this tube is a disposable product, whether 2G or 20g in it. This is a NOGO! ---------------------------- Update 09/12/2013 Mittlerewile I use the leftover activator felt pen with the cheapest tube of superglue from Pollin for pennies. It works just as good as with the Originaltube Henkel / Loctite. And in one sense, even better - the cheap tube has already 5 bonds behind the cannula is still functional.