How to Remove Iron & Rust Stains From Granite

Remove stubborn rust and iron stains from granite surfaces with this homespun remedy!

Granite is a commonly used stone, found in households across America. Whether for floors, tiles or counter tops, granite adds a distinct, classy look while still being durable. Even the most durable granite, however, can still acquire unsightly, hard-to-clean iron and rust stains. Due to granite's porous nature, these stains soak in and can remain for years. Traditional cleaners do little to remove iron and rust stains, sometimes even making them worse. For those with these tough stains, not all hope is lost. With the application of this simple poultice, you can lift the stains right out.

Things You'll Need

• Oxalic acid
• Kaolin clay powder
• Distilled water
• Plastic wrap
• Masking tape
• Plastic spoon
• Plastic cup
• Knife

Instructions

1. Measure equal amounts of oxalic acid and kaolin clay powder, scaling the amount based on the size of the stain, pouring each into the plastic cup. Stir these two components with your spoon, adding water until the mixture reaches a thick, paste-like consistency.

2. Wet the stained area, making sure the granite is completely soaked.

3. Spread the mixture onto the stain and the surrounding 1-inch area using the spoon. Apply the mixture until it is approximately 1/4 inch thick.

4. Cover the entire mixture with plastic wrap, taping down the edges to create a seal. Using the knife, poke a few small holes in the top to allow drying.

5. Wait for the mixture to dry completely, typically within 24 to 48 hours. Remove the mixture from the granite and rinse with water. Repeat the entire process if stain persists.

Tips & Warnings

• If the granite dulls from this treatment, use some polishing powder and buff with a cloth.

• Use care when handling the oxalic acid

References

• Natural Stone: Stain Removal

Resources

• How to Clean Things: How To Clean Granite
• Oxalic Acid Fact Sheet