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To remove fertilizer rust stains from your driveway or concrete sidewalk you can use an acidic cleaner or descaler to complete the task.  

At Selleys, we recommend using Hillmark Scalex Heavy Duty to remove fertilizer rust stains from your driveway or concrete sidewalk .  

1. Mix up a strong dose of Hillmark Scalex Heavy Duty  in a 9L bucket. Add about 1/4 to 1/2 a cup of Scalex to 5L of water.  
2. Rubber gloves are highly recommended when using Scalex. Complete a spot clean to ensure it removes the existing stain.  
3. Then spread over the stained surface and work in with a stiff brush.  
4. Thoroughly hose away the product to dilute the remaining mixture.