Believe it or not, J-B Weld makes quite a few different products above and beyond their classic “J-B Weld” metal-filled epoxy — like this stuff designed to re-attach rear-view mirrors.
I came across this because one of the project cars that’s been gracing (read: pissing fluid all over, getting pushed around it, and generally frustrating everyone who visits) the Toolmonger shop came to us with the rear-view mirror sitting in the passenger seat. Seriously, this looks like just the ticket.
It’s a two-part cement. The adhesive itself comes in a snip-top packet, so you just snip the top and apply it to the mirror bracket. You apply the accelerator — which comes in a felt-tip applicator — to the spot on the glass where you’re going to stick the bracket, wait 30 seconds, and put the two together. Thirty minutes later it’s completely cured and you can re-attach the mirror.
Best of all: it sells for around $2 from a variety of vendors. We found it for $1.69 on Amazon.