I am wholly intrigued by your backyard study. Are you saying you have always planted watermelon next to the cucumber and they've never had melded tastes and you're saying this year is the first year that's happened? Or first year to plant in close proximity ?
The bond will be literally in the dark if you sandwich the replacement mirror on top of the broken mirror. No worries about UV. Heat , yes. A silicone adhesive should be find for something held vertically and the object is light in weight Good luck. Post a pic on There I fixed it. Maybe I'll see your handiwork
Abigail , I was at a junkyard Thursday pulling parts off a 1984 rx7. I can tell you 85% of the time , pulling a part off will take longer than you think I like the posters solution. Only if it's not a collectible car!