The iron in the fertilizer is what causes rust.
Iron fertilizer stains on concrete.
You might have known that.
Many consumer fertilizers today contain a small percentage of iron a mineral your lawn needs to stay healthy but which your concrete certainly doesn t.
Water causes the chemical pellets to basically soften on the concrete and therefore the properties inside the chemical will cause deep rust.
Use this to remove the rust stains https amzn to 2utvyxl.
Powdered concentrate it can simply be mixed with water to form a gel that will cover approximately 60 square feet of concrete.
Fertilizer rust stains on concrete comprise some the most powerful and embedded tough rust stains to eliminate.
I found a product that cleans fertilizer stains from concrete.
Sold in a 22 oz.
Sometimes a fertilizer bag can cause a nasty stain when placed on a concrete walkway.
How to remove fertilizer rust stains from concrete.
Super easy to use does not have a strong odor or harm your hands it s sealgreen.
This may sound weird but fertilizer really can leave rust stains on your pristine concrete.
Not all fertilizers have iron but it does get your grass really green.
Iron fertilizers contain iron sulfate which can stain your walkway.
You can use concrete rust stain removers that are readily available at home improvement centers.