The size and position of a crack in a concrete driveway can help determine if it's a DIY fix. Fine narrow cracks, or "crazing," indicate a surface dried too quickly when the concrete was poured. These cosmetic cracks benefit from a cement-based resurfacing product containing polymer modifiers and additives that form a bond with existing concrete. Cracks that are 1/4 inch in width occur most likely from shrinkage as the driveway cured. These can be filled with sealant to even out the surface and avoid further widening.
Crumbling cracks along driveway edges can be restored with a cement and acrylic fortifier mix. For entire corners, a structural repair material can be sculpted to reform the edge. Over time, control joints may widen and fill with debris or vegetation. After thorough cleaning, use a self-leveling sealant to fill in the gap. Keep an eye out for uneven cracks wider than an inch, these may indicate structural problems that may require a professional fix.
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