How to Change the Color of Flagstone
- 1). Put on your rubber gloves. Mix 1 qt. muriatic acid with 2 gallons of water in a bucket. Dip your scrub brush into the mixture and scrub each individual flagstone vigorously. Rinse well with clean water and allow each flagstone to dry for 24 hours.
- 2). Fill a bucket with a solution of a mild concrete stain mixed with water in a 1:1 ratio. Pour the mixture into your sprayer and spray each flagstone individually, working the stain in with a broom. Allow each flagstone to dry completely.
- 3). Rinse out your bucket and mix 1 cup of baking soda with 1 gallon of water in your bucket. Dip your mop in the mixture and wipe down each flagstone, neutralizing the mild acid on the stones.
- 4). Pour your sealer into a paint roller pan and dip your paint roller in it. Coat each flagstone with a thin coat of sealer. Allow the sealer to dry and add a second coat.
