How to Sand Quartz Countertop Edges


Quartz countertops are popular in many homes due to their durability, beautiful appearance, and low maintenance. However, like all countertops, quartz can develop rough or uneven edges over time with use. Sanding and polishing the edges of quartz countertops can restore them to like-new condition. With some basic tools and materials, DIYers can achieve professional-looking results when learning how to sand quartz countertop edges.

In this comprehensive guide, we will cover everything you need to know to properly sand and polish the edges of quartz countertops. We will discuss:

  • Reasons for sanding quartz edges
  • Tools and materials needed
  • Safety precautions
  • Step-by-step instructions for sanding
  • Finishing and polishing techniques
  • FAQs about sanding quartz edges

Whether your countertop edges have chips, small cracks, or just feel rough to the touch, this guide will help you restore them safely and effectively. With a little time and effort, you can renew the beauty of your quartz countertops edges.

Reasons for Sanding Quartz Edges

There are a few main reasons homeowners choose to sand and polish their quartz countertop edges:

To Remove Chips and Cracks

Over time, small chips and cracks in the edges can occur from bumping, scraping, or dropping heavy objects on quartz surfaces. Sanding helps carefully remove these imperfections for a smooth finish.

To Smooth Out Rough Areas

Daily use along the countertop edges can cause them to become rough or uneven. Sanding removes any high spots or roughness.

To Renew Appearance

Sanding and polishing restores the like-new sheen and feel of quartz edges. This can help refresh the overall look, especially on older countertops.

Before Resealing

Sanding cleans the edges in preparation for resealing and protects the sealant bond. It is an important first step before reapplying sealant to quartz edges.

Before Color Enhancement

If you plan to apply color enhancement to your quartz edges, sanding prepares the surface for maximum polish and color adhesion.

No matter what condition your quartz edges are in, sanding and polishing can rejuvenate their appearance and remove any imperfections.

Tools and Materials Needed

Sanding and polishing quartz countertop edges does not require expensive tools or a high level of expertise. The process can usually be completed with materials commonly found in most homes. Here are the basic tools and supplies needed:

Safety Gear

  • Dust mask – Protects lungs from breathing dust particles
  • Safety goggles – Shield eyes from flying debris when sanding
  • Ear protection – Reduces noise from power tools

Sanding Tools

  • Orbital sander – Provides smooth, even sanding on edges
  • Sandpaper – Various grits from coarse (80 grit) to fine (400-600 grit)
  • Sanding sponge – For hand sanding in tight areas

Polishing Compounds

  • Diamond polishing pads – Attaches to sander for glossy polishing
  • Polish creams – Manual buffing for final sheen

Additional Supplies

  • Painter’s tape – Masks off countertop surface to prevent scratching
  • Tack cloths – Removes dust between sanding grits
  • Microfiber cloths – For buffing and shine
  • Mineral spirits – Cleans sanding residues off surface

These affordable supplies are available at most hardware stores. It’s also a good idea to review the specific sanding and care guidelines from your quartz manufacturer. With the right tools assembled, you’ll be ready to start renewing those countertop edges.

Safety Precautions

Sanding quartz countertop edges involves powered tools and dust particles, so adhering to some safety best practices is crucial:

  • Read and follow all instructions that come with your power sander or polisher.
  • Always wear eye protection and a dust mask when sanding. Ear protection helps reduce noise.
  • Make sure the work area is free of clutter, liquids, children, and pets.
  • To avoid burning the surface, sand using light pressure and keep the sander moving constantly.
  • Unplug sanding and polishing tools before changing pads, discs, or bits.
  • Allow polishing compounds time to dry completely to prevent smearing on the quartz.
  • Use the correct grit sandpaper for each sanding stage, working up from coarse to fine.
  • Clean up dust frequently with a vacuum and damp microfiber cloths.
  • Take your time when sanding edges. Quartz can chip or crack if gouged too aggressively.

Exercising caution helps prevent injury and ensures you get smooth, even results.

Step-by-Step Sanding Instructions

With your tools assembled and safety gear on, you’re ready to start renewing your quartz countertop edges. Follow these step-by-step instructions for best results:

Stage 1 – Prepare the Edges

  1. Clear countertops of any items, appliances, dishes, etc. Remove sink drain screens.
  2. Cover the countertop surface with painter’s tape or plastic sheeting to prevent accidental scratches.
  3. Clean quartz edges thoroughly with mineral spirits to remove all dirt, grease, and residues.
  4. Inspect edges closely and make note of any chips, cracks, or very rough areas needing extra smoothing.

Stage 2 – Perform Initial Sanding

  1. Attach an 80-grit sanding disc to your orbital sander. This coarse grit removes the most material.
  2. Hold sander flat against edge, apply light pressure, and move steadily back and forth from end to end.
  3. Focus on problem spots but sand all edges evenly to prevent uneven spots.
  4. When the edges feel smooth and even, stop sanding. Wipe away all dust with a tack cloth.

Stage 3 – Progress Through Finer Grits

  1. Replace 80-grit disc with 120-grit and repeat even sanding of all edges.
  2. Wipe away dust then sand again with 220-grit disc for a smoother surface.
  3. Finally, use 400-600 grit sandpaper to refine the edges. Take care on the final sanding.
  4. Use a hand sanding sponge for hard to reach areas near walls or countertop seams.
  5. After each sanding stage, wipe all dust residue off edges completely.

Stage 4 – Clean Surface and Remove Tape

  1. Give all edges a thorough final wipe down with damp microfiber cloths.
  2. Carefully remove any painter’s tape from the countertop surface.
  3. Inspect closely for any remaining dust in corners or seams and remove it.
  4. Dry the edges completely with a clean, soft cloth.

Once these sanding stages are complete, your quartz edges should feel smooth and renewed. But achieving an attractive sheen requires finishing the job with polishing.

Polishing Techniques

Sanding alone leaves quartz edges with a matte, sanded appearance. Polishing brings back the like-new glossy finish. Here are two options:

Orbital Sander Polishing

  1. Install a diamond polishing pad on your sander. Use the finest grit available.
  2. Following the countertop edge contours, work the polishing pad steadily back and forth.
  3. Overlap passes to ensure even coverage on the edges.
  4. Repeat if needed to achieve your desired polish level.

Manual Polishing

  1. Apply a small amount of quartz polish cream to a microfiber cloth.
  2. Rub cream evenly into edges using circular motions.
  3. Continue buffing until achieving your desired sheen.
  4. Remove any excess polish completely.

Either method works well. The orbital sander is faster for large countertops, while manual polishing lets you finesse small sections. Combine both techniques for the best results.

Applying Sealant

Once your quartz edges have been restored with sanding and polishing, properly sealing them will protect the renewed finish. Here are a few tips:

  • Use a sealant specifically formulated for quartz, such as a penetrating quartz sealer.
  • Make sure all polish residues have been removed before sealing, so the sealant bonds effectively.
  • Apply enough sealant to saturate the edges, following the product directions.
  • Allow the full cure time before using the countertops.
  • Reapply sealant yearly to maintain protection.

Proper sealing locks in your sanding and polishing results for long-lasting renewed edges.

FAQs About Sanding Quartz Edges

Sanding and polishing quartz countertops edges is a straightforward process, but many homeowners have additional questions:

Is sanding quartz edges difficult for a DIYer?

With some basic tools and materials, sanding quartz is totally manageable as a DIY project. The process simply involves working through progressively finer sandpaper grits. Pay attention to safety and take your time for best results.

How can you avoid chipping edges when sanding?

Always apply light, even pressure when sanding. Aggressive scrubbing or gouging can chip quartz edges. Let the sandpaper do the work. Hand sand with a sponge in tricky spots.

Should you use water when sanding quartz?

Never wet sand quartz countertops. Water can seep into seams and damage adhesive or wood substrates. Dry sanding is recommended to prevent moisture issues.

How smooth of a finish can you get from sanding?

Using ultra-fine grit sandpaper and polishing compounds, quartz edges can achieve a high-gloss, smooth-to-the-touch finish. The sanding and polishing steps remove all scratches and roughness from properly resurfaced edges.

How long does the renewed finish last?

With proper care and maintenance, the renewed sheen and smoothness achieved from sanding and polishing quartz edges should last for many years before needing a refresh. Using sealant helps prolong the results.


Sanding and polishing are affordable and accessible DIY methods to restore the original beauty of aged quartz countertop edges. By following the techniques outlined in this guide, homeowners can achieve professional-level results. Investing some careful effort into properly sanding your quartz edges pays off in renewed durability, safety, and eye-catching appearance.