In the past I have used rock salt (from my water softener) to treat
unwanted plant growth coming up through my pavers. I would dilute it
with water, 1:4 in a 2 gallon spay bottle and go at it.

Although effective, I am curious to know if this is deleterious to the
pavers over time. I don't want to use herbicides because of children
and domestic pet considerations.

Would appreciate if anyone is willing to share info or experiences.

Thanx.

John