How to Clean Quartz Countertops with Ammonia

Quartz countertops are popular in many homes for their durability, stylish appearance, and low maintenance. However, like any countertop material, quartz can get dirty over time and require occasional deep cleaning. Some homeowners use ammonia to clean quartz countertops, but is this actually safe and effective? Here is a comprehensive guide on how to properly clean quartz countertops with ammonia.

Is Ammonia Safe for Cleaning Quartz?

Ammonia is a powerful chemical typically used as a cleaning agent. When diluted with water, it can be an effective degreaser and disinfectant for many household surfaces. However, there are a few factors to consider when using ammonia on quartz countertops:

  • Quartz is non-porous – Unlike natural stone, quartz repels liquid rather than absorbing it. This means spills and stains sit on the surface rather than seep in. Ammonia-based cleaners can be used since the chemicals won’t penetrate the material.
  • Check manufacturer guidelines – Some quartz brands specifically advise against ammonia. Always refer to your countertop manufacturer’s care and maintenance guide before using any chemical cleaner.
  • Use proper dilution – Ammonia should always be diluted for safe use on any surface. A 10% solution (1 part ammonia to 10 parts water) is commonly recommended for cleaning quartz countertops.
  • Rinse thoroughly – After cleaning with ammonia, be sure to rinse the countertop several times with clean water to remove any chemical residue. Allow to fully air dry as well.

With proper precautions, an ammonia-based cleaner can be used to safely clean quartz countertops without damaging the material.

Step-by-Step Guide to Cleaning Quartz with Ammonia

Follow these steps for best results when using ammonia to clean quartz countertops:

Gather Supplies

  • Ammonia-based household cleaner or pure ammonia
  • Warm water
  • Soft clean cloths
  • Mild detergent or dish soap
  • Rubbing alcohol (optional)
  • Protective gloves, safety goggles

Make Ammonia Cleaning Solution

  • In a spray bottle, mix a 10% ammonia solution of 1 part ammonia to 10 parts warm water. For heavy buildup, you can use a slightly higher ammonia concentration.

Clean the Countertop

  • Sweep or wipe down the countertop to remove any loose debris or crumbs.
  • Apply the diluted ammonia solution liberally over the entire surface. Avoid spraying directly near backsplashes or walls.
  • Allow the solution to sit on the quartz for 2-3 minutes so it can penetrate grime and buildup.
  • Scrub the entire surface with a soft cloth, sponge, or nylon scrubbing pad. Apply moderate pressure for stuck-on messes.
  • For stubborn spots and stains, let the ammonia solution sit for 5-10 minutes before scrubbing.

Rinse and Dry

  • Wipe down the quartz countertop with a clean damp cloth to remove all ammonia residue.
  • Follow up by rinsing 2-3 times with just warm water and a soft cloth.
  • Blot up any excess moisture with a dry towel. Allow the countertop to completely air dry.

Optional Polishing

  • Once fully dry, apply a small amount of rubbing alcohol to a microfiber cloth.
  • Rub the alcohol over the entire quartz surface to polish it and eliminate any streaks or residue.
  • Buff dry once more with a clean soft cloth for a sparkling finish.

With this thorough cleaning method, ammonia can safely refresh dingy quartz countertops and keep them looking like new. Always test ammonia in an inconspicuous spot first, and never let it sit too long on the surface.

Tips for Safely Using Ammonia on Quartz

Here are some top tips to get the best results from ammonia without damaging your quartz:

  • Always use ammonia in a well-ventilated area and avoid breathing in fumes directly.
  • Wear gloves and eye protection when handling pure ammonia.
  • Only use ammonia on sealed, polished quartz surfaces. Avoid rough grout lines or unfinished stone edges.
  • Limit ammonia cleaning to once a month or less to prevent stripping the finish over time.
  • Mix a weaker dilution (8 parts water to 1 part ammonia) for regular maintenance cleaning.
  • Never mix ammonia with bleach, vinegar, or other acids since toxic gases can result.
  • Rinse repeatedly and wipe up spills quickly to prevent evaporation streaks on the quartz.
  • Blot spills instead of wiping to prevent spreading the mess around.

With proper precautions, ammonia can make quartz countertops shine while avoiding damage from overuse or misuse of this harsh chemical.

Common Questions About Using Ammonia on Quartz

Many homeowners have additional questions about using ammonia to clean quartz countertops. Here are answers to some of the most frequently asked questions:

Is ammonia more effective than vinegar for cleaning quartz?

Ammonia is a stronger degreaser and disinfectant than vinegar. It can cut through oil, grease, and soap scum more effectively. However, vinegar is a much safer everyday option for quartz.

Can I mix ammonia with vinegar or bleach when cleaning quartz?

Never mix ammonia with vinegar, bleach, or any other household chemicals. Dangerous gases can form. Always use ammonia separately diluted in water.

How often can I clean my quartz countertop with ammonia?

Limit ammonia cleaning to once a month or less on quartz. More frequent use can strip the finish over time. Stick to mild dish soap and water for daily cleaning.

Is it safe to use ammonia on quartz sink bowls and bathtubs?

Yes, ammonia can be used to clean solid quartz surfaces throughout the home. Follow all the same dilution and safety tips. Thoroughly rinse sinks and tubs.

Can ammonia damage the seams on quartz countertops?

When used properly diluted, ammonia should not harm quartz seams. Avoid concentrating ammonia directly on seams and edges for prolonged periods.

Maintain Your Quartz Countertops

In addition to occasional deep cleaning with ammonia, be sure to:

  • Blot up spills immediately to prevent stains on quartz.
  • Rinse quartz surfaces after preparing foods that can etch the finish. These include citrus, vinegar, wine, tomatoes, mustard, and alkaline cleaners.
  • Avoid abrasive pads, scouring powders, or strong alkaline cleaners (like oven cleaner) on quartz.
  • Use a cutting board and trivets to protect quartz from damage. Never cut directly on the surface.
  • Re-seal quartz countertops every 1-2 years with a penetrating quartz sealer to renew stain resistance.

With regular care and proper deep cleaning techniques, your beautiful quartz countertops can stay looking pristine for decades to come.


Although harsh, ammonia can be an effective cleaner for quartz countertops when used correctly. Always dilute it properly, limit usage frequency, rinse thoroughly, and take safety precautions. For routine cleaning, stick to gentler options like dish soap, vinegar, hydrogen peroxide, or specialized quartz cleaners. With the proper care, quartz countertops will retain their sparkling look and resist stains and damage. Check manufacturer guidelines before using any chemical cleaner on quartz surfaces.