Sealing Exterior Cinder Block Walls

Concrete block sealer products.

Sealing exterior cinder block walls.

Most block sealing is done with a high performance penetrating sealer that seals and waterproofs while leaving a completely natural sheen and appearance. Fortunately you have many options for improving a cinder block wall. Foundation armor penetrating sealers and water repellents can be used to seal both interior and exterior cinderblock and concrete block walls. The original cinder blocks had crumbled and no longer were supporting the concrete pad adequately.

Your cinder block basement wall must be waterproofed to provide a proper home environment. Manufacturers cast cinder block also known as concrete masonry units from pumice or clay and concrete to form a lightweight hollow block. Stucco is similar to concrete but more decorative. Call in a structural engineer for an in depth evaluation.

Filling a small and moderate crack is necessary to prevent unhealthy conditions in the home. Cinder block walls are strong and inexpensive but they aren t always pleasant to look at. Several masonry patching products such as hydraulic cement do an adequate job of filling cracks in concrete. Cinder blocks are classified as permeable to water and water vapor 10 perms.

Deco 20 clear penetrating sealer a green product producing a highly breathable moisture barrier that stops water vapor transmission. Why cinder block walls leak. By waterproofing your basement you will be preventing health dangers and also costly repairs. They chemically react below the surface without changing the look or color of the block and they won t leave behind a visible surface film.

This water can cause structural damage and grow mold. These products work 100 below the surface to protect from. If you notice large recurring cracks or bulging walls at your house don t try to fix these conditions yourself. If you see wet spots you need to let them dry out.

The cracks might indicate a more serious structural problem. Let the cinder blocks wall dry completely you can t apply radonseal or any other sealing product until the blocks are dry. Heavyweight concrete blocks are semi permeable 5 perms and less so when the hollow cores are filled and packed with a slurry mix of concrete about 2 perms. Otherwise water will seep in through the walls of your basement.

Cracks in basement walls allow water to enter the basement which leads to mold and mildew growth. Home blog cinder block sealers and how to seal cinder block walls. Also for the exterior walls retaining walls and non load bearing partition walls. A cinder block is much more porous compared to a standard concrete block or poured concrete.