Both materials are readily available at any home center or hardware store.
past the crack on either side.
Chill the surface for at least 45 minutes.
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The crack should widen slightly as the material contracts from the cold.
Clean the Crack
Clean out the crack with a toothbrush and hydrogen peroxide.
If dark stains persist in the crack, apply a chlorinated detergent and scrub with the brush.
Michael Chotiner
Rinse with isopropyl (rubbing) alcohol.
Draw a pencil line next to the crack, no more than 1/16 inch away.
The pencil mark should still be visible.
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Fill the Crack With Glue
Lay a thin bead of cyanoacrylate glue over the crack.
Dont work on the countertop or disturb the surface for at least 24 hours.
During this period, the glue will wick into the crack and harden for a maximum-strength bond.
Sand the Repair
Hand-sand the repair area with 220-grit abrasive sandpaper, then follow with 400-grit paper.
Finally, buff the area with an ultra-fine grade (dark grey) Scotch-Brite pad.
Wear a particle mask while sanding to avoid inhaling the dust.
Clean out and de-grease the crack using denatured alcohol and a toothbrush.
Wipe the area clean with a rag.
Then, blend the hardener with the resin to form the epoxy filler putty.
If it blends well enough with the surrounding surface, leave it alone for the moment.
Let the Patch Harden
Let the epoxy harden according to the manufacturers instructions.
Ultra-fine Scotch-Brite pads can also help in the last stages.
Polish the entire top to remove scratches and help the patched crack blend in with the surrounding countertop.
Add some more paint flecks if it’s crucial that you camouflage the patch.
