How to Fix Broken Quartz Countertops

Quartz countertops are popular in many homes due to their durability, beautiful appearance, and low maintenance. However, like any other countertop material, quartz can become damaged over time. Chips, cracks, and heavy stains are some common issues that can occur. Thankfully, there are ways to repair quartz countertops and restore their flawless look. Here is a comprehensive guide on how to fix broken quartz countertops.

Assessing the Damage

The first step is to assess the extent of the damage to determine the best repair method.

Types of Damage

  • Small chips and cracks – These are minor damages that affect just the surface layer of the quartz.
  • Large cracks and fractures – Deep cracks that penetrate through the slab are more serious damages.
  • Stains – Food stains, water marks, and other discoloration issues.
  • Seam separation – Countertops made of multiple quartz pieces can have the seams separate.

Inspection Process

Carefully examine the damaged area. Pay attention to the depth and severity of chips, cracks, and stains. See if the damage is localized or affects a large portion of the countertop. This will help determine what repair techniques to use. Having a professional inspection is advisable for major damages.

Cleaning and Prepping the Area

Once you’ve assessed the damage, properly clean and prep the area for repair:

  • Clean the area with non-abrasive soap and water to remove grime and debris.
  • For stains, use a stone-safe cleaner and gently scrub with a soft cloth or nylon brush. Avoid harsh chemicals.
  • Carefully dry the area afterwards. Make sure the surface is clean and free of moisture.
  • Sand down any rough edges around chips and cracks using fine-grit sandpaper.
  • Vacuum away all dust and particles after sanding.

Proper cleaning and prep ensures the repair materials can adhere well for a seamless finish.

Repairing Minor Chips and Cracks

Small chips and hairline cracks in quartz can often be repaired using DIY methods:

Supplies Needed

  • Colored epoxy resin that matches your countertop
  • Mixing cups, stir sticks, gloves, and masking tape
  • Surface sealant/primer
  • Sandpaper
  • Clean rags

Step-by-Step Instructions

  1. Clean and dry the damaged spot thoroughly.
  2. Apply 2-3 thin coats of sealant/primer and let dry completely.
  3. Prepare the resin according to package directions. Mix small batches to prevent premature hardening.
  4. Fill the chip or crack with resin using a putty knife or spatula, overfilling slightly.
  5. Let the resin cure fully. This can take up to 24 hours. Avoid disturbing the area while curing.
  6. Once cured, sand the area with fine-grit sandpaper until smooth and flush with the rest of the surface.
  7. Clean away all dust. Apply more resin if needed to fill any remaining unevenness.
  8. Apply sealant over the repaired spot to blend with the rest of the countertop.

With this simple repair, chips and cracks can be filled to look practically invisible.

Repairing Larger Cracks and Fractures

For more severe cracks and fractures that penetrate deep into the slab, a clear epoxy resin designed for stone repair should be used:


  • Stone repair epoxy
  • Syringe or epoxy injector kit
  • Surface sealant
  • Tape
  • Sandpaper
  • Solvent for cleaning


  1. Clean out the crack thoroughly and let dry. Apply sealant if needed.
  2. Tape along both sides of the crack to prevent overflow.
  3. Prepare the two-part epoxy according to directions.
  4. Use a syringe or injector to fill the crack fully from the bottom up. Remove air bubbles.
  5. Remove tape before epoxy dries. Allow to cure fully.
  6. Once cured, sand flush with the countertop. Rinse away debris and dust.
  7. Apply more epoxy if needed to level any uneven areas. Let cure and sand again.
  8. Clean area well and seal.

With the right epoxy filler, even fractures up to 1/8″ wide can be repaired to be barely noticeable.

Removing Difficult Stains

Certain stubborn stains require more intensive treatments:

  • For dried food, grease, oil, or hard water stains – Use a poultice made of household solvent and talc powder. Apply to the stain and cover in plastic wrap. Let sit for 24 hours, then scrub clean.
  • For wine, coffee, ink, or dye stains – Make a baking soda and hydrogen peroxide paste. Apply and let sit covered overnight, then rinse.
  • For mineral deposits or rust stains – Soak a cotton ball in lemon juice or vinegar and place over the stain. Cover with plastic wrap and leave overnight before scrubbing away.

Always spot test stain removers first and never use harsh chemicals that can damage the quartz. Avoid abrasive scrubbing. Seek professional help for stains that don’t respond to DIY methods.

Re-adhering Separated Seams

For quartz countertops made from joined pieces, the seams can sometimes separate:

What You’ll Need

  • Clear silicone caulk/sealant made for quartz
  • Caulk gun
  • Painter’s tape
  • Denatured alcohol
  • Rags
  • Sandpaper


  1. Thoroughly clean the separated seam and surrounding area with denatured alcohol.
  2. Sand the seam edges lightly to rough up the surface. Wipe clean.
  3. Apply painter’s tape along both sides of the seam, leaving just the gap exposed.
  4. Load the caulk gun with quartz caulk. Fill the seam fully, pushing the quartz pieces firmly together as you caulk.
  5. Use a putty knife or finger to smooth the caulk flat and remove any excess.
  6. Allow the caulk to cure fully undisturbed for at least 24-48 hours.
  7. Once cured, gently peel off the tape and sand any uneven caulk flush with the surface.
  8. Clean and wipe the area down well. The seam should now be repaired and adhered.

With some simple caulking, separation gaps can often be fixed to look seamless again. Seek professional help though if the seam keeps re-opening.

When to Call a Professional

While many quartz damages can be DIY-repaired, it’s best to call a pro for:

  • Very large cracks wider than 1/8 inch.
  • Multiple fractured pieces or shattered sections.
  • Badly warped or misaligned countertops that need reinforcement.
  • Severe stains that won’t respond to cleaning.
  • Repeatedly separating seams.

Hiring a professional quartz fabricator is advisable for extensive damage. They have the skills, tools, and materials to seamlessly repair or replace damaged sections.

Maintaining Quartz Countertops

Regular maintenance is key to preventing extensive damages:

  • Use cutting boards and hot pads to protect from impacts and burns.
  • Clean up spills quickly to prevent stains.
  • Avoid abrasive scrubbers and harsh cleaners. Use a stone-safe daily cleaner.
  • Re-seal every 1-2 years with a quartz sealant to prevent staining.
  • Inspect for any cracks or loose areas around sinks that need re-caulking.

With proper care, your quartz countertops can stay looking pristine for years to come. But even if damage does occur, know that there are techniques available to make repairs and restore your countertops’ beauty.

Frequently Asked Questions About Fixing Quartz Countertops

Can I repair quartz countertops myself?

Yes, minor damages like small chips, surface cracks, stains, and seam separation can often be repaired yourself using specialty fillers and caulking designed for quartz. Just make sure to properly prep the area first.

What is the best adhesive to use?

For minor chips and cracks, use a resin filler made specifically for quartz repairs. For separated seams, use a clear quartz caulk/sealant. Avoid regular epoxies or super glues which can stain.

How long does quartz countertop repair take to cure?

Most quartz repair resins take 16-24 hours to fully cure. The repaired area shouldn’t be used during this time. Let caulked seams cure for at least 24-48 hours before use.

Can you buff out scratches in quartz?

No, unlike natural stone, quartz cannot be buffed and polished. But shallow scratches can be sanded out and then improved with resin filler. Deeper scratches may require a professional fabricator to hone and refinish the surface.

Is it worth fixing quartz countertop damage?

Fixing minor damage is often much more affordable than full replacement. And repaired damages can be nearly invisible in many cases. So it is generally worth repairing chips, cracks, stains, and seam gaps to restore your countertops’ original appearance and prevent further damage. Know when to call in a pro for extensive repairs.


Quartz countertops are susceptible to various types of damage over their lifespan. But there are many effective DIY methods to repair chips, cracks, stains, and other defects. For seamless repairs, be sure to properly assess the damage, prep the area, use the right materials, and follow the steps closely. With some simple techniques and supplies, quartz damages can often be fixed to restore your countertops’ flawless look and prevent more costly repairs down the road.