3M 4200 (white) to seal holes. I used 3M 5200 when I moved my TM batteries to the passenger side to gain better weight distribution. Located the trays, marked the holes, pilot drilled for the mounting screws, applied 5200 in and around the pilot hole,and a few dabs on the bottom of the tray, place the tray and install the screw. Solid as a rock.
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