A lot of things like that don't degrade for hundreds of years except maybe by shedding some microplastic when you wash your plastic clothes. Does spray foam ha

A lot of things like that don't degrade for hundreds of years except maybe by shedding some microplastic when you wash your plastic clothes. Does spray foam have a failure mode just sitting in a wall? If it does, I wonder if they'll have some special robot to replace it one day.