How to Remove Rust Stains from Granite Countertops?

Granite countertops are a stunning addition to any kitchen or bathroom, valued for their durability, elegance, and long-lasting performance. 

However, even granite isn’t immune to problems like rust stains. These reddish-brown marks can appear unexpectedly, whether from metal objects left on a damp countertop, iron deposits naturally present within the stone, or corrosion from surrounding metals.

Left untreated, rust can dull the granite’s shine and, in severe cases, create permanent discoloration.

The good news is that rust stains on granite can be removed safely using the right methods. This guide provides a complete step-by-step approach, covering everything from quick fixes to advanced DIY methods, along with tips on prevention, safety, and common mistakes to avoid.

⚡ Quick Fix Options for Rust Stains on Granite

For those who want a fast solution, here’s a summary of the most effective methods:

1. Granite Cleaner – Use a commercial stone-safe cleaner with a nylon brush. Repeat if necessary.
   
2. Baking Soda Poultice – Mix baking soda + water into a paste, cover with plastic wrap, and leave for 24–48 hours.
   
3. Hydrogen Peroxide (Last Resort) – Spray with 3–4% hydrogen peroxide, scrub gently, and leave for 24 hours.
   
4. Seal & Protect – Always reseal your granite after stain removal to prevent future rust.
   

Scroll down for step-by-step instructions, alternative methods, and safety tips to make sure you do it correctly.

Why Rust Stains Form on Granite

Granite is a porous natural stone, and it often contains veins or deposits of iron, which can oxidize when exposed to moisture. Rust stains typically appear due to:

• Metal objects left on damp surfaces – cans, cast iron pans, utensils.
  
• Water exposure – puddles, dripping dish drainers, or spills.
  
• Iron deposits in the granite itself – internal oxidation can create stains from within the stone.
  

Even with careful use, rust can develop from within the stone itself. That’s why preventative care and proper maintenance are essential.

Can You Remove Rust from Granite?

Yes, you can remove rust from granite.

Granite is a durable, non-porous natural stone that resists rust itself, meaning the stone won’t corrode like metals do. Rust stains on granite are typically caused by iron or steel objects left on damp surfaces or by iron deposits within the stone reacting with water. 

While the stain may appear deep, granite’s structure allows for stain removal without damaging the surface if handled properly. Methods like poultices, baking soda pastes, or controlled chemical treatments can draw the rust out of the stone’s pores. 

The key logic is that granite’s hardness and chemical resistance prevent the rust from permanently bonding with the stone, unlike softer materials. 

By applying a safe cleaning method and following proper drying and sealing steps, the stain can be effectively lifted while keeping the granite intact, restoring both its appearance and longevity.

Things You’ll Need

Before starting, gather the following materials:

• Commercial granite cleaner
  
• Baking soda
  
• Water
  
• Plastic wrap
  
• Painter’s tape or masking tape
  
• Nylon scrub brush or soft scrubbing pad
  
• Hydrogen peroxide (3–4%)
  
• Putty knife or razor blade
  
• Granite sealer (for resealing afterward)
  
• Optional: lemon juice, oxygenated bleach, WD-40, pumice stone, gloves, goggles, mask
  

Having all the tools ready ensures you can complete the process safely and efficiently.

Step-by-Step: How To Remove Rust Stains from Granite Countertops?

Here are three methods you can try one of them to remove rust stains from granite

Method 1: Start with a Commercial Granite Cleaner

If your granite is regularly sealed, rust may only be on the surface, making a stone-safe commercial cleaner the simplest solution:

1. Apply the cleaner to the stained area according to the manufacturer’s instructions.
   
2. Scrub gently using a nylon brush in circular motions. Avoid steel wool or anything abrasive that could scratch the granite.
   
3. Rinse thoroughly with water and dry the area.
   
4. Repeat if the stain fades but persists.
   
5. Reseal the granite after cleaning to protect it from future staining.
   

This method works for light surface stains and is the safest starting point.

Method 2: Poultice for Deep Rust Stains

For stains that penetrate the stone, a poultice is highly effective. Poultices draw rust out of granite using a thick paste that absorbs contaminants as it dries.

Step-by-Step Poultice Application

1. Mix the Poultice
   
   • Combine rust stain remover powder (or baking soda) with water to form a peanut butter-like paste.
     
   • Avoid making it too liquid, as this slows drying and reduces effectiveness.
     
2. Apply Over the Stain
   
   • Spread the paste over the rust stain about ¼ to ½ inch thick.
     
   • Cover completely for maximum effect.
     
3. Cover and Seal
   
   • Place plastic wrap over the paste and seal edges with painter’s tape or masking tape.
     
   • Poke a few small holes in the plastic to allow controlled evaporation.
     
4. Let It Work
   
   • Leave the poultice for 24–48 hours. During this time, the mixture pulls rust out of the stone and into the paste.
     
5. Remove and Rinse
   
   • Once dried, gently scrape off the poultice with a putty knife or razor blade.
     
   • Clean the area with a stone-safe cleaner and dry thoroughly.
     
   • Reseal granite to restore protection.
     

⚠️ Note: Avoid using acidic poultices on marble or calcium-based stones. Granite is safe, but acids can etch other stones.

Method 3: Hydrogen Peroxide (Last Resort)

For stubborn rust stains, 3–4% hydrogen peroxide can be a last-resort solution:

1. Pour hydrogen peroxide into a spray bottle.
   
2. Spray the stain generously and scrub gently with a nylon brush.
   
3. Let sit for 24 hours.
   
4. Rinse and dry the area.
   
5. Seal the granite afterward.
   

If the stain remains, it may require professional treatment.

Alternative DIY Methods

Some rust stains can respond to gentler, household methods:

1. Baking Soda + Lemon Juice Paste – Mix into a thick paste, apply, scrub gently for 5 minutes, rinse, repeat as needed.
   
2. Oxygenated Bleach Solution – Mix 2 tbsp oxygenated bleach powder with 2 cups water, spray on stain, let sit 10 minutes, rinse thoroughly.
   
3. WD-40 + Soft Pad – Spray lightly, rub gently in circular motions, rinse thoroughly.
   
4. White Vinegar + Baking Soda Paste – Mix 3 parts baking soda with 1 part vinegar, apply, let sit up to 30 minutes, scrub gently, rinse.
   
5. Commercial Rust Removers (CLR, Iron Out) – Follow instructions carefully, wear gloves, goggles, and a mask, rinse thoroughly after use.
   
6. Pumice Stone – Wet the stone and rub gently in circular motions; rinse and dry.
   

⚠️ Safety Tip: Always test any method in an inconspicuous area first.

Common Mistakes to Avoid

1. Wrong Tools – Avoid harsh abrasives that can scratch granite; use soft cloths or nylon brushes.
   
2. Too Little / Too Much Pressure – Apply gentle, consistent pressure; don’t over-scrub.
   
3. Scrubbing Too Hard – Let the cleaner or poultice do the work.
   
4. Not Rinsing Properly – Residue can attract dirt and create new stains.
   
5. Not Drying Properly – Wet surfaces promote more rust.
   
6. Skipping Sealing – Always reseal granite to maintain protection.
   

Benefits of Removing Rust from Granite

Removing rust stains offers more than just visual improvement:

• Restores the granite’s original shine and beauty.
  
• Protects the stone from further damage and water infiltration.
  
• Eliminates potential bacteria or chemical residues from corroding metals.
  
• Extends the lifespan and integrity of your countertop.
  

Prevention Tips

1. Seal Granite Regularly – 3–4 times per year with high-quality stone sealer.
   
2. Keep Surfaces Dry – Wipe spills immediately; place trays under dish drainers.
   
3. Avoid Leaving Metal on Wet Granite – Pans, cans, and utensils can accelerate rust.
   
4. Routine Cleaning – Use stone-safe cleaners to maintain protection.
   

When to Call a Professional

If rust persists after trying poultices, hydrogen peroxide, and household remedies, consult a stone care professional. Deep stains may require professional-grade poultices, chemical treatments, or resurfacing that are safer and more effective.

Final Thoughts

Rust stains on granite countertops can seem intimidating, but with patience, the right tools, and proper technique, they can be removed safely. Begin with gentle solutions, escalate to poultices or hydrogen peroxide as needed, and always prioritize safety and stone protection.

By maintaining your granite—sealing regularly, keeping it dry, and cleaning promptly—you can enjoy rust-free, polished, and beautiful countertops for years to come.

Read Also:

• How to Make Granite Countertops Shine: Simple DIY Tricks
• How to Clean Granite Countertops Daily: Quick Routine for Lasting Shine