How to Remove Tannin Stains on Concrete
- 1). Place a few teaspoons each of tea tree oil and glycerin in a bucket.
- 2). Add a few quarts of hot water to the bucket.
- 3). Brush the solution on your stains. Allow to sit for 20 to 30 minutes.
- 4). Scrub the stains again.
- 5). Rinse with fresh water.
