How To Repair Quartz Countertop Cracks

Quartz countertops are durable and long-lasting, but cracks can still occur. Repairing quartz countertop cracks properly ensures your countertops remain beautiful and functional for years to come. With some basic tools and supplies, you can often repair quartz cracks yourself.

Assessing Quartz Countertop Cracks

Before attempting to repair a quartz countertop crack, assess the damage to determine the best approach.

  • Look at the size and depth of the crack. Small surface cracks or chips less than 1/4 inch wide can often be repaired with adhesive and touch-up kits. Larger, deeper cracks over 1/4 inch wide or affecting the structural integrity require professional help.
  • Determine if the crack is a clean break or if sections have chipped away. Clean breaks are the easiest to repair.
  • See if the crack affects the support underneath. Cracks exposing the substrate indicate major damage.
  • Check if the crack is spreading. Growing cracks signal a more serious underlying issue.
  • Try to find the origin of the crack. Impact points like bumps or dropped objects are easier to fix than cracks from improper installation or settling.

Thoroughly assessing the quartz countertop crack damage guides your repair approach. Knowing the crack’s type and extent also determines whether DIY repair is possible or it requires a professional fabricator.

Cleaning and Preparing the Crack

Once assessing the crack, properly clean and prepare the surface before attempting to repair it.

  • Use a soft cloth and mild detergent to remove dirt, oil or debris from the crack and surrounding countertop area. Avoid harsh cleaners.
  • Let the surface completely dry after cleaning.
  • For chips or missing pieces, carefully sand any rough edges with fine grit sandpaper. Sand until smooth.
  • Clean out any loose particles or crumbs in the crack using a vacuum attachment, compressed air or soft brush.

Proper cleaning and light sanding prep allows the adhesive or resin to bond optimally with the quartz countertop surface.

DIY Quartz Countertop Crack Repair

Small, surface cracks and chips under 1/4 inch can often be repaired by homeowners with specialty adhesive kits. Here are the basic steps for DIY quartz crack repair:

1. Tape Off Surrounding Area

Cover the countertop surface surrounding the crack with painter’s tape. This keeps excess adhesive from getting on the countertop.

2. Mix Adhesive

Prepare the adhesive according to kit directions. Colored quartz repair kits allow you to closely match the adhesive color to your countertop.

3. Fill the Crack

Use a putty knife to fill and pack the adhesive into the crack. Overfill slightly to allow for curing shrinkage.

4. Smooth the Surface

Once filled, use the putty knife to smooth the adhesive flush with the countertop surface.

5. Cure the Adhesive

Follow kit instructions for curing time. Most take 24-48 hours to fully cure before sanding and sealing.

6. Sand and Seal

Once cured, use fine grit sandpaper to smooth and blend the repaired area. Clean and seal with a penetrating sealer.

With care, small quartz countertop cracks and chips can be repaired with good as-new results. Larger cracks require professional help.

Professional Quartz Countertop Crack Repairs

Cracks over 1/4 inch, affecting the underlying support or structural integrity of the countertop cannot be repaired with simple adhesive kits. These cracks require professional help to restore your quartz countertop.


A professional fabricator will assess the full extent of the damage and determine if repair is possible or a full countertop replacement is needed.

Crack Preparation

The crack is cleaned out and prepped through grinding and sealing to stabilize it before filling.

Color Matching

The quartz adhesive color is custom matched to your countertop hue and pattern using samples.

Filling the Crack

The adhesive is injected into larger cracks to fully fill and bond it. Pressure is applied until cured.


The crack is sanded smooth and sealed. The repair is polished to blend seamlessly with the undamaged areas.

Though more costly than DIY repairs, professionals can often restore even significant quartz countertop cracks to like-new condition.

Preventing Quartz Countertop Cracks

While quartz is very durable, some cracking can happen. Follow these tips to help prevent cracks from occurring:

  • Inspect countertops thoroughly at installation before finalizing. Refuse delivery for any unexplained cracks or imperfections.
  • Ensure countertops are properly supported, level and anchored during installation to prevent stress cracks.
  • Use cutting boards and hot pads. Never slice or place hot items directly on the quartz surface.
  • Avoid sitting, standing or putting excessive weight on countertops.
  • Clean spills promptly to prevent moisture seeping into cracks.
  • Have professionals remove sections or alter countertops. Improper do-it-yourself alterations can cause cracks.

With proper care and maintenance, your quartz countertops should remain gorgeous and crack-free for many years. But minor cracks and chips do happen. Knowing how to repair quartz countertop cracks enables you to renew the surfaces and maintain their function and beauty.

FAQs About Repairing Quartz Countertop Cracks

Some common questions about repairing cracks in quartz countertops include:

Can I repair a cracked quartz countertop myself?

Small surface cracks and chips less than 1/4 inch wide can often be repaired DIY with adhesive kits. Larger cracks should be handled by a professional fabricator.

What kind of adhesive should I use?

Specialized quartz repair kits with adhesive colored to match your countertop are best. Clear epoxy resin can also work for minor chips.

How do I match the adhesive color?

Quartz repair kits allow you to closely match the adhesive color. You can also bring a sample of your countertop to a hardware store for help selecting the right colored epoxy.

How long does the adhesive take to cure?

Adhesive cure times vary by product but are usually 24-48 hours before sanding and sealing. Follow kit instructions.

Should I seal the repaired crack?

Yes, use a penetrating sealer designed for quartz to blend the repaired area and add protection.

Can cracks reappear after repair?

Properly repaired small cracks should remain intact. But if underlying support or installation issues caused the crack, it could reopen or spread without fixing those problems.

Is it better to repair or replace a cracked quartz countertop?

For small cracks and chips, repair is more economical. Large cracks compromising structure or appearance often require a full replacement. Professionals can best advise.

How can I prevent cracks in my quartz countertops?

Prevent cracks by properly supporting and leveling countertops on installation, avoiding impact damage, cleaning spills quickly, and not overloading or improperly altering counters.

With professional help for deeper structural cracks, and DIY kits for minor surface damage, most quartz countertop cracks can be repaired while retaining the durability and beauty of the countertops.

Professional Quartz Countertop Crack Repair Services

For cracks that exceed your DIY repair abilities, seek help from these recommended professional quartz countertop repair services:

  • Granite Transformations – Offers expert crack repair services for quartz countertops nationwide. Skilled technicians assess damage, color match adhesives, inject resins, and polish repairs smooth. Provides 5-year warranty on repairs.
  • A1 Granite Quartz – Specializes in professional quartz crack repair at affordable rates. Experienced with repairing difficult cracks and matching OEM colors. Services Los Angeles area homes and businesses.
  • The Crack Doctor – Repairs all types of cracks and chips in quartz, marble, granite, and other natural stone surfaces across the US. Can precisely match unique colors and patterns.
  • Quartz Medic – Dedicated to repairing all damage in quartz surfaces. Repairs are custom matched to your countertop, structurally reinforced, and polished. Serves greater Phoenix, AZ area.
  • Eastern Granite and Marble – Offers professional quartz crack repair for residential and commercial customers throughout Rhode Island. Repairs structural and cosmetic cracks to restore integrity and appearance.

Don’t live with unsightly quartz countertop cracks. With the right materials and techniques, cracks and chips can often be repaired to restore your countertops to like-new condition, whether DIY or by quartz repair professionals.


While durable, quartz countertops can develop cracks that affect their appearance and function. Small surface cracks under 1/4 inch can often be repaired DIY with specialty adhesive kits if the steps are followed properly. Larger cracks require professional quartz repair services to inject stabilizing resin and polish the area to match the rest of the countertop. With some care and effort, most quartz cracks and chips can be repaired to restore your countertops to their original flawless state. By understanding repair options and preventing damage, you can enjoy beautiful, crack-free quartz countertops for a very long time.