3M 5200 Adhesive. $15.00 a tube and worth every dime. I moved the battery trays in my Sabre. Used 5200 to fill all old holes, pre-drilled the new screw holes and added a bead before installing 1/2″ – #12 SS screws, applied a liberal bead on the bottom of the trays, and installed them.Theyre not going anywhere.