Relatively non-toxic concrete joint filler/sealing material that will last?
I have a failed cove joint in my below-grade level, and need to replace part of the fiber board joint material that exists between the slab and foundation wall. I need it to be a permanent type repair, as it will be difficult to get at the joint after my remodel, and I have radon present in my soil.
Does anyone know of a product that both works well (i.e may have a 20+ year life on concrete, remaining attached and flexible) and isn’t highly toxic or classified as a carcinogen?
Most of the products I’ve looked at have a pretty discouraging SDS sheet, though that isn’t entirely a surprise.