StreeTAN’s acidified formula safely and efficiently removes beverage and tannin stains. Stains in this group seldom respond to a neutral spotter and often require acidic action for complete removal. However, certain sensitive dyes may be damaged by products with unknown acidity. When using StreeTAN, you can be assured of safe removal of tannin stains. StreeTAN is safest for coffee, beer, grass, liquor, mustard, soft drinks, tea, wine and other tannin stains. Choose StreeTAN for safe, fast and effective removal of tannin stains.