What adhesive will bond the letter to the skin

[batt]

I had to replace the back panel which has the letters and now need to install them, some have the tabs on the back broken, so the only route is to glue them. What epoxy do you recommend which will hold over the years? I know there has to be one since planes are now make of bonded plastic and metal.

[Aerowood]

One of the other Colorado posters here can up with a solution. He made some small aluminum strips that would nest in the back of the letter. he then drilled an interference hole for either a #6 or #8 stainless steel machine screw and epoxied the strip with the stud through it into the back of the letter. After it dried he just put a nut on the now new stud.

[withidl]

I've used clear silicone rubber to bond rear view mirrors back onto the windshield after the OEM glue/epoxy failed. The mirrors are attached with a set screw to a small metal plate that is glued to the windshield; I cleaned the windshield and metal plate with Windex, applied silicone rubber to both, then pressed the plate to the windshield such that 99% of the silicone was pressed from under the plate; left it that way for 3 days to cure; re-attached the mirror and it never, for years, failed again.

Silicone rubber doesn't age out like other glues and if most of it is pressed out from in between hard surfaces there is no "flex" left in it. The only place where it fails is if one of the surfaces is soft and flexible, so if your letters are not of hard plastic/metal then don't use it.

[AldeanFan]

I would recommend windshield Urethane.
Available at any auto body supply store.

It lasts almost forever and is extremely strong, we used it when I worked in an Auto Body shop to hold on moldings, trim and emblems.

Just don't get it on your hands or anywhere you don't want it, it's very difficult to clean off!

[batt]

Thanks to everyone for the info!