Can You Use Clr on Granite Countertop – Is It Safe?

Granite countertops are a beautiful addition to any kitchen or bathroom, but they require regular cleaning and maintenance to keep them looking their best. Many people wonder if they can use CLR (Calcium Lime Rust) to clean their granite countertops. In this article, we will explore whether CLR is safe for granite and provide alternative cleaning options to ensure the longevity of your countertops.

Can You Use Clr on Granite Countertop?

CLR is a suitable choice for effectively removing buildup from porcelain, ceramic, stainless steel, and various fixtures. However, granite countertop cannot be cleaned with CLR due to its high acidity.

The chemicals in CLR can penetrate granite and remove the seal, so I do not advise applying it to any natural stones. Instead, use appropriate cleaners specifically formulated for granite.

If you have calcium or lime buildup on your granite countertops, there are specialized granite stain remover products available that can effectively remove these deposits. To tackle excessive buildup, you may need to use a putty knife or a similar tool to gently scrape off the deposits. Once the majority of the buildup is removed, you can use a commercial stone cleaning solution.

When using a stone cleaner, apply it to the surface of the granite and gently rub it in using a clean, soft cloth. Avoid using abrasive materials like steel wool or harsh scrubbing pads, as they can scratch and damage the surface of the stone.

The Uses and Effectiveness of CLR

CLR can be a powerful weapon against the three main culprits causing unsightly stains around sinks and tubs. Its versatility to remove different types of stains gives CLR an edge over other cleaners. It’s primarily employed in bathrooms and kitchens, where calcium, lime, and iron deposits are abundant.

Following the application of CLR, these mineral buildups and rust can be easily removed, making your surfaces shine anew. However, remember, the key to safe and successful use of this product lies in strictly adhering to the given instructions.

What to Use on Granite Countertops?

An alternative to CLR is a homemade solution of equal parts white vinegar and water, which you can spray on the stained area, let sit for 15 minutes, and then wipe off with a microfiber towel. For stubborn stains, a cleaning paste made from baking soda and vinegar might do the trick.

3 Alternatives Cleaning Options for Granite Countertops

To clean your granite countertops safely and effectively, consider the following alternative cleaning options:

  1. Mix a few drops of mild dish soap with warm water. Use a soft cloth or sponge to gently clean the surface, and then rinse thoroughly with clean water. Dry the countertop with a clean cloth to avoid water spots.
  2. Create a solution of equal parts white vinegar and water. Spray the mixture onto the countertop, let it sit for a few minutes, and then wipe it clean with a soft cloth or sponge. Rinse the surface with water and dry it thoroughly.
  3. Use granite specific cleaners. There are numerous commercial granite cleaners available on the market. Follow the instructions provided by the manufacturer for safe and effective use.

Things You Should Avoid Doing with CLR

  • Always use CLR in a well-ventilated area to avoid breathing in chemical fumes.
  • Never use CLR without spot-testing it first, and ensure to clean spills immediately.
  • Don’t let CLR sit for more than two minutes, and always dilute it with water at a 1:1 ratio.
  • Never mix CLR with bleach or other household cleaners.
  • Avoid applying CLR with a spray bottle, instead use a sponge, scrub brush, or bowl to apply it.

Surfaces Not Suitable for CLR

CLR should not be used on plastic, laminates, Formica, Corian, aluminium, galvanised metals, nickel, oil-rubbed bronze, brass, natural stone or marble (including cultured marble), terrazzo, colored grout (other than white), or painted, coated, sealed, or metallic glazed surfaces.

CLR, being highly acidic, can corrode or “etch” marble countertops, much like acidic foods, vinegar, bleach, ammonia, and Lysol cleaners.

How to Use CLR on Other Kitchen Surface

While CLR (Calcium Lime Rust) is not recommended for use on granite due to its acidic nature, there are specific steps you can follow to ensure the safe and effective use of CLR on other surfaces in your kitchen or bathroom. In this section, we will provide you with a step-by-step guide on how to use CLR properly:

Before You Begin:

  1. Carefully read the instructions provided on the CLR bottle. Follow the manufacturer’s guidelines for safe handling, dilution ratios, and specific application methods.
  2. Wear protective gloves and ensure proper ventilation in the area where you will be using CLR. Open windows and doors, run vents, and avoid enclosed spaces to minimize exposure to chemical vapors.
  3. Before applying CLR to any surface, perform a spot test in an inconspicuous area to check for any adverse reactions or damage.

Step-by-Step Guide:

  1. Dilute CLR with water according to the instructions provided. The recommended ratio is usually 1 part CLR to 1 part water, but always double-check the instructions for the specific product you are using.
  2. Thoroughly shake the bottle of diluted CLR solution before applying it. This ensures that the components are well mixed and distributed.
  3. Hold the spray bottle approximately 6 inches away from the surface and lightly spray the CLR solution onto the area you want to clean. Make sure to cover the entire surface evenly.
  4. Allow the CLR solution to sit on the surface for a few minutes. This allows the chemicals to penetrate and dissolve any stains or deposits.
  5. For stubborn stains or buildup, you can gently agitate the surface using a soft brush or sponge. Be careful not to use abrasive materials that could scratch or damage the surface.
  6. After the designated time, use a clean, dry cloth or paper towel to wipe away the CLR solution. Alternatively, you can rinse the surface thoroughly with clean water to remove any residue.
  7. If the stains or deposits are not fully removed, you can repeat the process. However, avoid leaving the CLR solution on the surface for an extended period, as it can cause damage.
  8. After cleaning with CLR, make sure to thoroughly dry the surface with a clean cloth to prevent water spots or streaks. Inspect the countertop to ensure that the stains or deposits have been effectively removed.

Note: It is important to emphasize that CLR should not be used directly on granite countertops due to the potential for damage. The steps mentioned above are applicable for using CLR on other surfaces in your kitchen or bathroom, but it is recommended to use specialized granite cleaners for cleaning and maintaining granite countertops.

Frequently Asked Questions

Is clr safe for granite countertop?

No, CLR is not safe for granite countertops as it is highly acidic and can penetrate the granite, removing its seal and potentially damaging the stone.


Is clr poisonous to humans?

Yes, CLR (Calcium Lime Rust) can be harmful to humans if ingested, inhaled, or if it comes into contact with skin and eyes.

Wrapping Up

In conclusion, CLR is an exceptional cleaning solution, crucial for maintaining the sparkle of your household fixtures. It is not recommended to use CLR on granite countertops due to its acidic nature, which can compromise the seal and potentially damage the stone. However, the key to leveraging its effectiveness lies in following the provided guidelines and tips diligently. With these insights, you can now approach your cleaning tasks more confidently.

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