Chosen Solution

My iPhone 11 recently cracked only on the back glass. It’s no big deal with a case, but I want to retain the structure of the phone. The back glass is covered in hairline cracks (no chunks of glass gone). I understand that sealing glass with Epoxy won’t fix the look of the cracks. My goal with this idea is to smooth out the back glass of the phone and give it better structural integrity/weatherproofing. Do you guys think this is a good cheap repair, or would the epoxy/resin/windshield repair kit damage the components of the iPhone? If this a good idea, how would I best perform the procedure? Many thanks!

have the back glass replaced, it doesnt cost the earth these days. most techs use cold press glue to seal the replacement back glass now which will help with water resistance

Glue the whole back side over and add a loop of adhesive at the seam for insurance. Replacement back glass WILL NOT retain water resistance.