How to Fill Chips in Quartz Countertops

Chips, cracks, and other minor damage in quartz countertops can occur over time with normal wear and tear. Thankfully, it is possible to repair these imperfections and restore your countertop’s flawless appearance. Here is a step-by-step guide on how to fill chips in quartz countertops.

Assessing the Damage

The first step is to take a close look at the chip or crack and assess the severity of the damage. Small chips, minor cracks less than 1/4 inch wide, and surface scratches can typically be repaired. However, deep cracks wider than 1/4 inch may require a professional repair or replacement of the countertop section.

Determine if the damage is only in the surface layer of quartz or if it extends deeper into the material. Surface chips can be more easily repaired while deep cracks exposing the substrate underneath are more problematic.

Cleaning and Preparing the Area

Thoroughly clean the area to remove any dirt, debris, oil, or soap residue. Use a non-abrasive cleaner and soft cloth. This allows the filler to properly adhere.

Sand the edges of the chip with 150 grit sandpaper to rough up the smooth quartz surface. This gives the filler something to grip. Round off any sharp points or corners. Clean the area again after sanding.

Choosing the Right Filler

Select a high-quality quartz countertop repair kit made for filling chips and cracks. These contain engineered fillers designed to bond well and mimic the properties of quartz. Acrylic-based fillers tend to work better than epoxy.

Make sure to pick a filler in a color that matches your existing quartz countertop hue. Many kits include multiple color options to blend with different countertop shades.

Filling the Damage

Follow the product instructions for mixing the filler resin and hardener. Use a ratio of about 2 parts resin to 1 part hardener by volume. Stir thoroughly until blended.

Apply the quartz filler using a putty knife, working it into the damaged area from all directions. Overfill slightly since it will shrink a bit as it dries.

Allow the filler to cure fully, which usually takes about 30 minutes. The surface should be completely dry to the touch when fully cured.

Sanding and Polishing

Once cured, use 220 grit sandpaper to smooth and level the filled area. Be careful not to sand down into the surrounding quartz surface.

Move up through finer 400 and 600 grit sandpapers until the filler is flush and even with the countertop. Wipe with a soft cloth between sanding to remove residue.

Finish by polishing with a buffing pad or very fine sanding sponge for a smooth, glossy finish. The filled area should now seamlessly match the countertop finish.

Re-sealing and Protecting

Apply a thin coat of stone sealer to the repaired section per the product instructions. This prevents moisture from getting under the filler and debris from collecting in the crack.

Be gentle with the area for at least a few days while the filler fully cures. Avoid using abrasive cleaners or placing hot items on the repaired spot. The chips in your quartz countertop should now be successfully filled and durable for years to come.

Frequently Asked Questions About Filling Chips in Quartz Countertops

Can I use regular epoxy or silicone to fill chips in a quartz countertop?

No, regular household epoxies and silicones do not have the right properties to properly adhere and mimic real quartz. Use a specially designed quartz filler product for the best repairs.

How well does filled quartz match the original surface?

High quality quartz fillers are engineered to dry extremely hard and resist staining and scratching. When sanded and polished smoothly, the repaired spot should become nearly invisible.

Is it possible to fill chips and cracks in quartz myself or do I need a pro?

Minor chips, surface scratches, and hairline cracks can often be repaired successfully with a DIY quartz countertop repair kit. But deep cracks or extensive damage may require a professional fabricator.

Can any color quartz chip be matched and filled?

Quartz repair kits are available in many basic colors to blend with common countertop shades of white, black, beige, grey and more. But rare or unique quartz colors may be impossible to match perfectly.

How long does quartz chip repair filler last compared to the original surface?

A properly filled chip in a quartz countertop should be very durable and last for many years. Use care around the area and reapply sealer periodically for maximum longevity.


Repairing chips or cracks in quartz countertops is doable with the right materials and techniques. Carefully assess the damage, clean and prep the area, select an engineered quartz filler, neatly fill the chip, sand and polish smoothly, then seal. With some patience and effort, the imperfections can be made nearly invisible. Just be sure to use specialty quartz repair products, not household epoxy or silicone. Follow the steps outlined and your countertops will look flawless again.