Matt L.

Concrete worker.

Smooth concrete window sill under open window with shadows

Concrete Microcracks After Curing: Causes, Visibility, and When to Seal

Introduction Concrete microcracks after curing are tiny cracks that form as the slab gains strength and settles. They are usually hairline and may be visible on the surface or near joints. Causes include shrinkage, temperature changes, and normal settling, not necessarily a defect. Sealing timing and product choice depend on your climate and the sealer

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Close up of concrete surface with small voids and holes