How to Repair Damaged Quartz Countertops

Quartz countertops are durable and low-maintenance, but damage can still occur. With the right techniques and products, many quartz countertop repairs can be handled as a DIY project. Here is a comprehensive guide on how to repair damaged quartz countertops.

Assessing the Damage

The first step is to assess the type and extent of damage to your quartz countertop. Look closely at the damaged area and determine if it is:

  • A surface stain that has not etched into the quartz
  • A light scratch or etching that has not removed material
  • A chip, crack, or missing chunk of quartz
  • A seam that has separated or cracked

Surface stains and light scratches are the easiest to repair. For more significant damage like cracks, chips, and missing pieces, the repair is more complex.

Cleaning and Prepping the Surface

Before attempting any repairs, thoroughly clean the entire quartz countertop surface. Use a mild non-abrasive cleaner and a soft cloth. Avoid aggressive scrubbing and abrasive cleaners.

Once clean and dry, carefully sand the damaged area with fine grit (320 or higher) sandpaper. This prepares the surface for maximum adhesion with the repair products. Wipe away all sanding dust.

Repairing Surface Stains and Light Scratches

For stains that have not etched into the quartz or minor scratches that have not removed material, a polishing compound is often effective.


  • Choose a high-quality polishing compound made for quartz or engineered stone. Options include Seal Green Countertop Magic, Akemi Quartz Countertop Polish, or Rock Doctor Polish Cream.
  • Apply a small amount of the polish to a soft cloth or felt polishing pad. Avoid dripping liquid directly on the countertop.
  • Using firm, circular motions, buff the stained/scratched area for 2-3 minutes. Apply more compound as needed.
  • Thoroughly wipe away all residue and buff the area with a clean soft cloth.

This gentle polishing action will remove most light stains and scratches, restoring the quartz surface. For stubborn issues, repeat as needed. Avoid over-polishing.

Repairing Chips, Cracks, and Missing Pieces

For more significant damage like cracks, chips, or missing chunks of quartz material, a filler/adhesive product is needed for structural repairs.

Materials Needed:

  • Clear epoxy adhesive formulated for quartz countertops
  • Mixing sticks and container
  • Painter’s tape
  • Plastic putty knife
  • Sandpaper
  • Polishing compound


  • Isolate the damaged section with painter’s tape. This keeps the epoxy contained as it can set quickly.
  • Mix a small batch of epoxy adhesive according to package directions. Use a clear formula to best match the quartz.
  • Use the putty knife to fill and pack the epoxy into the damaged area, pressing it firmly into any cracks or missing chunks.
  • Remove painter’s tape before epoxy dries. Smooth excess adhesive with putty knife.
  • Allow full curing time per manufacturer instructions, often 24-48 hours.
  • Once fully cured, sand the repair smooth using fine grit sandpaper.
  • Polish the repaired section with compound to blend with surrounding quartz.

With the proper epoxy products, you can achieve long-lasting repairs for quartz chips, cracks, and missing sections. Take care to smoothly match the existing surface.

Reattaching Separated Seams

If a seam between quartz countertop slabs has separated or cracked, it requires re-sealing:

Materials Needed:

  • Clear 2-part epoxy adhesive
  • Mixing sticks/container
  • Syringe or painter’s tape
  • Plastic putty knife
  • Sandpaper
  • Polishing compound


  • Clean and dry the separated seam thoroughly.
  • Prepare epoxy adhesive per package instructions.
  • Load mixed epoxy into syringe or line up seam with painter’s tape. This contains the adhesive.
  • Inject or pour epoxy into full length of cracked seam. Spread evenly.
  • Allow to cure fully, often 24 hours. Remove syringe/tape.
  • Once cured, sand the refilled seam smooth and flush with surrounding quartz.
  • Polish repaired area to blend quartz surfaces.

With patience, separated quartz seams can get a lasting repair. Take care not to get epoxy on the surrounding countertop area.

Preventing Future Damage

To help avoid future quartz countertop damage:

  • Use cutting boards, trivets and heat pads to protect from knives, pots/pans, and high heat.
  • Clean spills promptly to preventpossible stains. Use mild cleaners only.
  • Avoid abrasive cleaners and scrubbing pads which can dull and scratch quartz.
  • Have seals reapplied around sinks/faucets periodically to prevent moisture seeping under countertops.

With proper care and routine maintenance, quartz countertops will stay beautiful for years. But following these repair techniques can refresh quartz surfaces when damage does occur. Be sure to use specialty adhesives formulated for quartz and take care to smoothly match repairs to the existing surface.

Frequently Asked Questions

Can I use regular superglue or epoxy from the hardware store to repair quartz?

No, avoid regular household adhesives. Use only epoxy products specially designed for quartz and engineered stone. They contain polymers needed to bond properly.

Should I try to polish out deep scratches or etching in my quartz?

No, deep damage requires a filler adhesive for structural repair. Attempting to polish out material loss will usually worsen the issue.

Is it possible to repair quartz countertop damage myself or do I need a pro?

Many common quartz repairs like small chips, cracks, and scratches can be successfully completed as a DIY project if you use proper materials and techniques. But for large broken sections or complex repairs, hiring a countertop pro is advisable.

Will quartz repair products also work on other engineered stone surfaces?

Yes, specialty adhesives and epoxies designed for quartz can also repair damage on countertops made of sintered stone, Caesarstone, Silestone, and other engineered stone materials. Always check product labeling.

How long will my quartz countertop repair last?

When proper repair products and procedures are used, most restored quartz damages can last many years. But areas with repairs may be more vulnerable to new cracks or chips than original countertop surfaces.


Damaged quartz countertops can often be given like-new repairs with specialty adhesives and refinishing techniques. Assessing the type of damage and using products designed specifically for quartz are the keys to success. With some patience and care, chips, scratches, stains, and separated seams can be repaired for long-lasting renewal of quartz surfaces. Be sure to take measures to protect your quartz from future damage as well.