The crack or expansion joint must be cleaned of all debris.
Seal cracks concrete block wall.
Fill the crack with urethane caulk similar to what you would use for driveway caulk.
Seal the entire concrete wall with a waterproof masonry product.
Some low volume epoxy sealants are supplied.
There are the common fixes that do not last.
Repairing leaking cracks in concrete block walls is a common challenge for many homeowners.
Use foam backer rod into the gap with your fingers.
Typical concrete crack preparation for sealant with an epoxy product cleaning a concrete crack for patching and sealing.
Set the rod 1 4 in.
If a crack between the wall and floor exceeds inch some can be two inches wide or more inches wide call a foundation contractor who can fill it by injecting an expanding epoxy.
Urethane caulk is easy to apply but will soon peel.
Lower than the surface of.
Fill and smooth the joint.
Paint a generous coating of this material onto the wall working the product in all directions to completely seal any pinholes.
Waterproofing the exterior of your home can help protect your walls for longer.
Hydraulic cement does not bond well to concrete and will get loose after a couple of years.