Answer:
Used to keep prisoners silent and to make temporary repairs on cars.
It is something you make after you've weighed your options.
What is often on the ground getting stepped on by others, but you don’t have to wash it because it never get dirty, in fact you couldn’t wash it even if you tried?
I am the first you ever saw, what greets you every morning and what goes out in the end.
Barren location, infertile and dry; my name means "to leave", it's not heard to see why
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.