![]() Colored sand or color pigments may be mixed in if needed. The cured epoxy-sand mixture has a texture and color similar to concrete or mortar. The inside surfaces of the crack must be dry (although ElastiPoxy has a certain tolerance for damp surfaces). If the mix sags out of the cracks, add more sand to make it stiffer. The typical ratio is 4 parts of sand to 1 part of epoxy. Readily available in stores and inexpensive. The sand must be dry! Use granular sand without fines, like play sand or construction sand. Spalls, pitting, or holes in concrete driveways, slabs, and floors.ĭo not use the rigid epoxy-sand mix on joints or cracks that have to move! That requires the pure ElastiPoxy™ Joint & Crack Filler to allow for the natural expansion and contraction of concrete. If a concrete block foundation wall develops cracks because of settlement or soil pressure, the cracking will appear along the mortar joints.Leaking deteriorated concrete blocks, blocks with large pinholes, hard-to-seal concrete blocks.Cracks in concrete block walls or missing mortar.Surface cracks, holes, or defects in poured concrete walls, honeycombed concrete, leaking form ties.The cured repair is much stronger than the concrete itself.Īpplications for the ElastiPoxy-sand mix: The cement crack filler mix adheres tenaciously to concrete. The only reliable cement crack filler solution is ElastiPoxy™ Joint & Crack Filler mixed with sand, which provides a strong, rigid, and permanent repair of cracks or defects in walls or slabs. Common waterproofing paints or any coating would soon fail, pushed off by water pressure and efflorescence. And you cannot use the pure ElastiPoxy™ Joint & Crack Filler either because it would run out.Īnother common problem for homeowners is old leaking cinder blocks that have deteriorated after years of water seepage and efflorescence and which even RadonSeal Concrete Sealer cannot fully waterproof. The expanding polyurethane foam or injected epoxy would run into the hollow cores of the blocks. There is also hydraulic cement, which is inexpensive but will separate quickly and then crumble as the wall moves slightly.įoundation Crack Injection Kits are ideal for cracks in poured concrete walls but cannot be used on concrete blocks. Urethane caulk, which is very easy to apply has no strength and will soon peel need to be replaced. There are the many common fixes available that do not last. Repairing leaking cracks in concrete block walls is a common challenge for many homeowners.
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