My New House & Workshop

[Jim Oaks]

Lowe's /Home Depot sell a concrete repair caulk in a tube that would work well for that.

I bought some of that, but some if the gaps are way to big. Once it's all done I'm thinking I may spray some foam in there to fill most of the void, and then finish it off with hydraulic cement. I've seen it mentioned several times and a few videos talking about using it and how fast it sets up.

 

[Rick W]

Put masking tape on the block wall around the hole, and on either side of that crack, back about 3 or 4 inches from the opening. Then use the expanding foam. If it oozes out of the hole, it will sit on the tape. Once it’s dry/set, you can cut it off the surface with like a kitchen knife, pull the tape, and then you can carefully dig out a little bit of the foam so you can lay the caulk on top of it. Paint the wall and it will disappear.

You don’t have to use rustoleum for this one…