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Hairline cracks that are too narrow for sand are filled and repaired with two passes of the CrackWeld resin. To repair wide cracks or cracks with a void underneath, first fill the crack partially with sand to prevent the CrackWeld resin from running out. As the name suggests, this concrete crack sealer is specifically made to deal with hairline cracks. People often ignore hairline cracks thinking it's not a major issue. But these hairline cracks eventually turn into deeper and wider cracks. Plus, a hairline crack is enough for moisture to seep into the concrete surface and hurt.

Clean the crack of all debris — dirt, particles of concrete, or pebbles.

Use a vacuum cleaner or soft brush after you’ve cleaned out larger particles with a wire brush.

Dry the crack thoroughly.

If the crack is wet, let it dry or use a hair dryer.

Ezr Crack Filler

Put the concrete patch tube in a caulking gun.

You can put a tube of patching compound into a caulk gun.

Squeeze the patch into the crack

Be sure to follow the manufacturer’s directions when squeeze the patch into the crack.

If the crack is deep, fill the crack in layers. Give the product time to cure (dry) between applications.

Wipe excess patch off the crack with a wet rag.

You want the patch to finish with a smooth surface. Let the patch cure.

Ezr Hairline Crack Sealer Reviews

If you want to paint the concrete, you’ll need to wait about a month. It takes a long time for concrete patches to completely cure. Follow the manufacturer’s instructions to determine the optimum cure time.