The letters get glued on with black adhesive. I used 3M 08008, Black Super Weatherstrip and Gasket Adhesive.
Pull off the insulator, clean it up. Make sure the letters lay in indentations making full contact. I had to put a small bend in the R.
Put on the adhesive on both the letters and the insullator and let it get tacky. Then place the letters exactly where you want them. I put about 20lbs of weights on them and let it sit over night. The directions say “Assemble materials with sufficient pressure to ensure contact”, I might have gone a little overboard, but they aren’t coming off.
- Robert