How to Fix Gouge in Quartz Countertop

Fixing a gouge in a quartz countertop can seem daunting, but with the right materials and techniques, it is very doable as a DIY project. Quartz is an engineered stone made from ground quartz crystals held together with resin, making it nonporous and highly durable – but not completely immune to damage. Here is a step-by-step guide on how to fix a gouge in a quartz countertop.

What You Need

  • Quartz countertop repair kit (contains putty and bonding agent)
  • Putty knife
  • Sandpaper (120 to 220 grit)
  • Clean rags
  • Acetone or denatured alcohol
  • Tape (painter’s tape)
  • Safety gear (gloves, goggles, mask)

Step 1: Clean the Damaged Area

Use acetone or denatured alcohol to completely clean the damaged area and slightly beyond to remove any dust, grime, or oils. This allows the repair putty to properly bond with the countertop surface. Carefully wipe clean with a dry rag after cleaning.

Step 2: Sand the Scratch or Gouge

Use 120 to 220 grit sandpaper to lightly sand the damaged area to rough up the surface. This abrasion helps the putty adhere properly. Take care not to oversand, which can damage the surrounding quartz.

Step 3: Apply Repair Putty

Knead the putty from the kit until smooth and soft. Press putty into the gouged section, overfilling slightly. Use the putty knife to spread smoothly and remove any excess.

Step 4: Allow Putty to Cure

Tape around the putty with painter’s tape to create clean borders. Allow the putty to cure fully, which can take up to 24 hours. Curing times can vary based on humidity, so refer to kit instructions.

Step 5: Sand the Putty

Once fully cured, use 120 to 220 grit sandpaper to smooth the putty down flush with the countertop surface. Sand in circular motions. Remove all tape once smooth.

Step 6: Clean and Finish

Wipe away all sanding dust with a clean, dry rag. Use acetone or alcohol to clean the area once more. Allow to fully dry. Apply bonding agent from the kit as a final protective step.

Tips for Gouge Repair Success

  • Work in a well-ventilated area and use safety gear.
  • Kits come in colors to match your countertop but double check for a seamless finish.
  • Take your time prepping and sanding for an invisible fix.
  • Buff surroundings with acetone/alcohol to remove residue.
  • If the gouge is very deep, do multiple thin layers of putty for best results.

With a little time and effort, you can make gouges in quartz counters look like new again. Proper prep work, allowing proper cure times, using high quality sandpaper, and cleaning thoroughly makes for repairs that are virtually undetectable. Be patient and work carefully for seamless fixes. With the right techniques, you can save the cost of replacement.

Frequently Asked Questions About Fixing Gouges in Quartz Countertops

How long does quartz putty take to cure?

Quartz putty usually takes 12-24 hours to fully cure. Cooler temperatures or high humidity can prolong cure time. Be sure to allow the putty to cure completely before sanding or finishing the repair.

Can I use an auto body filler instead of a quartz putty?

Auto body fillers are designed for softer materials and likely won’t bond well or match the durability of engineered quartz. Use a specifically designed quartz countertop repair putty for the best, long-lasting results.

What grit sandpaper is best for smoothing quartz putty?

Use 120 to 220 grit sandpaper to smooth quartz putty. Start with 120 grit to level and shape the putty, then finish with 220 grit to refine the surface. Higher grit sandpaper can polish rather than smooth.

Should I finish the repaired quartz with a sealant?

Quartz is nonporous so sealants aren’t necessary. Simply clean well with acetone/alcohol once repair is complete. Buffing surrounding areas helps create an even, uniform finish.

Can I repair quartz myself or do I need a pro?

With the right materials and techniques, small gouges, chips, and scratches can definitely be repaired successfully as a DIY project. Larger damage may require a pro fabricator.

Is there an easy way to match the color of my quartz countertop?

Repair kits come in different color options. Hold sample chips right against your countertop in natural light to find the closest match before purchasing and using.


Fixing a gouge or scratch in quartz countertops is very doable with the right tools and techniques. By thoroughly cleaning the area, smoothing with sandpaper, filling with coloring-matched putty, allowing proper cure time, and finishing up with precise sanding and cleaning, you can achieve repairs that look seamless. With a little patience and effort, you can avoid the cost and hassle of replacing the entire counter. Follow these steps to restore your quartz countertops to their former flawless state.