(10-13-2011, 04:54 PM)elvis Wrote: whats a solvent based glue? like ultra hold etc?

Yes, solvent based "clear" glues such as ultrahold are much more resistant to water so they will help keep the unit attached through sweating, swimming, etc.

BTW....when I say that the bond will usually loosen when a water based glue gets wet, that's not to say that the hair is going to slide right off your head, but it can get a little loose. It will harden back up when it dries but until them it won't be quite as secure.