I used marine JB Weld and it worked great. I like that it is not affected by moisture or heat. When you clean your corny, if you use hot water it can cause other adhesives to release. After using the JB Weld I put a bead of silicon caulk around the rim where the bottom and metal meet and smoothed it out. This worked well and will keep water and gunk from seeping into the cavity between the bottom bumper and the bottom of the metal on the corny. Good luck!