Q: Using foam insulation to provide water seat inside cement blocks

Have you considered a sump pump in the basement floor to lower the water table?

Foam , i dought it will help. If you have cracks fix them first. Paint helps a little , but can need 7 coats of UGL.

The inside of my basement has the original functioning floor drain tiles that drain into a sump crock. It works, and keeps most of the water out. I still have a problem with damp block where the floor meets the cement block wall. The outside of the house has been sealed. There isn't any cracks, or holes. I believe the moisture is seeping in between the floor and under the block.

The cement block that the basement is made from is hollow, so I was wondering if filling the blocok with foam insulation would keep moisture from seeping inside.

Steve

How deep is the sump and does a pump remove the water? No sealant will stop the water forever. The idea is to get the water away from the house with correct grading, etc. Is it possible that the outside french drain is clogged with mud or the outlet plugged by a dead animal? Happens all the time.

No.