What to use to replace the string with putty on it to hold the plastic

.uh how about blue painters tape..lol eh nah.. I wouldnt go that far. Jk
I have to pull the back seat in the not to distant future and for sure I'll be changing out that blue tape for some black masking tape. It mortified me to use it, like putting on dirty underwear, only you know it's there but you worry that you might get into an accident!

:lol: