I posted this question so I could pass along my fix after trying several unsuccessful methods to patch my Source hydration bladder. Methods that did NOT work for me included: McNett Seam Grip, Shoe Goo, SealAll, Silicon and heat fusing with a screw driver warmed in a heat gun. The glues would not bond and I almost wrecked the bladder trying to heat fuse the plastic. I think there may be a different type of plastic lining the bladder so it did not want to fuse at the melting temp of the outside. The Source hydration bladder is made from polyethylene. After some google research, I used hot glue from a glue gun set to the higher temperature. Warm up the area slightly with a heat gun for a better bond and wait till the glue is good and hot. About 15 seconds after application, I smeared it with a screw driver to flatten it out. This is tricky because it is easy to get cold joints at the edges that will separate. Practice this first. There are special hot glue sticks for polyethylene but I just used the heavy duty sticks from Canadian Tire. I don't think this will work for all hydration packs as there are a number of different materials used by different manufacturers. This was a blue Source brand bladder.

Camping, Backpacking & Hiking