I use G2BG as my main bond, either for a day or 2, sometimes 3 depending on how much I use. It is NOT for everyone, as it is water soluble. For me, it works fine, even when I sweat. When sweaty, the bond will loosen, and as long as you don't completely sweat it away, it will rebond when your scalp dries. It took me time to learn to use it, but to me it is the best glue i have ever used. If you are interested in using it, search on this forum for numerous entries about it. Again, I love it, but it is NOT suited for everyone.