Seal Cracks Concrete Block Wall

Caulking concrete cracks install backer rod.

Seal cracks concrete block wall.

Some low volume epoxy sealants are supplied. The crack or expansion joint must be cleaned of all debris. Seal the entire concrete wall with a waterproof masonry product. Fill and smooth the joint.

Mix the epoxy sealant according to the manufacturer s directions. Lower than the surface of. Use foam backer rod into the gap with your fingers. 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.

Set the rod 1 4 in. Hydraulic cement does not bond well to concrete and will get loose after a couple of years. 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. Waterproofing the exterior of your home can help protect your walls for longer. Typical concrete crack preparation for sealant with an epoxy product cleaning a concrete crack for patching and sealing.