Peacock #93 Sensitizer Solution is formulated specifically for hard-to-wet surfaces such as waxes, plastics, rubber, and silk screen inks. This liquid concentrate is excellent on old and new glass. It can also be used on silvering conveyors with long "laytime" between the tin rinse and the silvering section. #93 Sensitizer Solution is a concentrate. Make sure to use 2-4 ounces with 1 gallon of deionized water. The amount of wetting required will determine the exact mix.#93 has a shelf life of 6 months. Keep the bottle tightly capped and in a cool dark place. A diluted solution has a pot life of 24 hours and must be made fresh daily.