Seal Cracks Concrete Block Wall

The crack or expansion joint must be cleaned of all debris.

Seal cracks concrete block wall.

Lower than the surface of. There are the common fixes that do not last. Mix the epoxy sealant according to the manufacturer s directions. Repairing leaking cracks in concrete block walls is a common challenge for many homeowners.

Seal the entire concrete wall with a waterproof masonry product. Waterproofing the exterior of your home can help protect your walls for longer. Paint a generous coating of this material onto the wall working the product in all directions to completely seal any pinholes. Fill the crack with urethane caulk similar to what you would use for driveway caulk.

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. Typical concrete crack preparation for sealant with an epoxy product cleaning a concrete crack for patching and sealing. Some low volume epoxy sealants are supplied. If you notice vertical or diagonal cracks forming have a contractor inspect your foundation as you may have a foundational leak on your hands in addition to any leaks the wall crack has caused.

Use foam backer rod into the gap with your fingers. Hydraulic cement does not bond well to concrete and will get loose after a couple of years. Fill and smooth the joint.