Bleach Solution

• If you are removing stains from leaves and dirt from your concrete steps, walkways or driveway, bleach works well. Mix a simple solution of one quart water to one cup bleach. Turn this into a paste that will draw out the stain by slowly stirring in one cup of flour until an even paste consistency forms. Smear an even coat of this paste over the entire stain, and let dry for one to two hours (drying time depends on outdoor temperature). When dry, hose off the excess solution.
  
  

Kitty Litter

• Kitty litter is very absorbent, and works quickly to remove spills that may cause staining on your concrete. Pour a thick coat of kitty litter over the stain, and work in with a stiff broom or brush. Let the litter absorb the stain for ten to fifteen minutes, sweep up the excess kitty litter and wash away residue with a powerful hose.
  
  

Ammonia and Detergent

• When cleaning greasy stains from both concrete and asphalt, ammonia and detergent work well. Pour one-half gallon of cold water into a bucket and add one cup of ammonia. Next, add 1/4 cup of a low-sudsing powdered dish detergent. Mix the ingredients together and scrub the solution into the concrete using a brush or sponge. When finished, rinse away residue with a powerful hose. Since ammonia emits powerful fumes, use this solution in a well-ventilated area, wearing a mask when possible.
  
  

Sodium Citrate

• If your concrete is stained with rust, sodium citrate can help. This ingredient can be purchased by the bottle at most hardware stores. Mix one cup of sodium citrate into two cups of warm water. Add 1/2 cup of baking soda to give the solution more bulk, then smear all over the rust stain. Let the mix stand on the stain for five to ten minutes, then work away with a firm brush. Rinse off excess residue with a hose.