Repair Your Granite Countertop Cracks with Thin CA Glue

Repair Your Granite Countertop Cracks with Thin CA Glue

Granite countertops are the standard for many homes because they are durable and come in a variety of colors and designs. Even though the stone can handle its fair share of wear and tear, there are times when granite repair is necessary to fix chips and cracks that the countertop can develop over timer.

One of the most effective materials used in granite countertop repair is CA glue, also known as cyanoacrylate glue. CA glue is an instant adhesive that is used for many industrial and household uses. It may require some elbow grease during the application, but otherwise, it's simple to apply. For this particular repair, use a thin CA glue

  • Specifications for Starbond Super Fast Thin CA Glue:
  • Viscosity is similar to water for quick penetration
  • Instant bond at about 2-3 seconds
  • Applied for beautiful high gloss finishes

It's easy to carry out a granite countertop repair, especially if the damage is small and minor. You don't need to spend hundreds of dollars getting a specialist to fix it. Simply follow the steps below to put your granite countertop back to its original form.

Step 1 - Prep the Area

The first thing you need to do is clean the area with some acetone. Use a piece of cloth or rag to apply a generous amount of acetone to the cracked/chipped area and to the surrounding area as well. This removes dust, dirt, and grime to ensure that the adhesion of the CA glue is at its strongest. If the area is not cleaned, no matter what CA glue you have, it won’t adhere as efficiently.

You can also use masking tape to cover the undamaged area leaving the damaged area exposed for when you are blending the thin CA to the countertop. Cleaning is a very important step that shouldn't be skipped. Wear the proper protective equipment such as rubber gloves, respirator mask, and make sure you are in a well-ventilated area.

Step 2 - Apply Thin CA Glue

Fill the crack or chipped area with the thin CA. Slightly overfill the cracked or chipped area so it slightly spills over onto the surrounding area. With a razor blade, slide it over the damaged area repeatedly to shave off excess CA adhesive from the granite. The instant adhesive will naturally soak into the granite so you want to repeat this action about 3-4 times, depending how large the crack or chip is. Of course, for larger cracks, you might have to repeat these steps more often. When you fill in the crack, apply the instant glue in layers and let it cure before applying more. Cure the glue in stages to ensure that the crack dries up from the very bottom to the very top. This will ensure a stronger bond.

Step 3 - Spray Super Glue Accelerator

After applying the coats of thin CA glue and shaving the CA to a smooth finish, you can spritz it with Super Glue Accelerator . This will ensure a faster curing and an instant solid bond. Carefully spritz the CA activator on the area where you just applied the glue. Remember to work in a well-ventilated area and read the Accelerator directions carefully before use.

Step 4 - Shave the Area

After waiting for about a minute, finish the repair by shaving off any excess CA glue. The cracked or chipped area will be slightly over-filled from the thin CA glue so you will want to smooth it out again by using a razor blade to gently scrape off the excess glue. You want the repaired area to be as smooth and even as the rest of the granite countertop, so you should keep shaving off excess glue until the repaired surface is completely flat.

To hold the blade properly, you need to hold it in a 90-degree angle by having the sharp edge go against the push. You want to alternate your hand’s position as you go the opposite direction to correctly shave and smooth out the repaired area. Alternate the shaving motion from different angles to ensure that the glue is not pulled out of the chipped or cracked area.

Step 5 - Polish the Area (Optional)

Finally, it is time to buff and polish the repaired area and get it to blend in with the rest of the undamaged granite top. Use any marble polish of your choice so you can match the glossy look of the surrounding granite area. This step is optional because thin CA already dries as a high gloss finish.


Some granite cracks are more severe than others. But, most average cracks can be fixed with some CA glue. The depth of the damage is also an important factor as well as the finish of the stone. For deeper or larger cracks, use thicker CA glue to fill in most of the damaged area Then you can top it off with thin CA glue to get a smoother and glossier finish.