It's been raining and I went into the garage and saw this, that's where I'm planning on putting my new gym equipment!

I looked outside the garage and this is the gap between me and the neighbours:

Below is the other side of the garage where you can see the garage is on a platform.

Can I put a thick layer of concealer on the outside of the garage where the wall meets the floor? Will this stop the damp comping?

I looked outside the garage and this is the gap between me and the neighbours:

Below is the other side of the garage where you can see the garage is on a platform.

Can I put a thick layer of concealer on the outside of the garage where the wall meets the floor? Will this stop the damp comping?
