FLT BLUE Liquid - Bright Dyes Tracer Dye for water or wastewater leak detectionDescription Color: Bright Dyes FLT Blue Best suited where the use of a Food Grade dye is desired May be used for visual inspections Frequently used for decorative effects Evaluation of household systems Generally blue may be more acceptable to public view Has super light fastness Resistant to the absorption of suspended matter 16 oz. Bottle (1 Pint) 1 Gallon bottles special order Type: Liquid Dye Best for moderate to large volumes of water, more than