If you want a water based, environmentally friendly, non-ammoniated “gentle” cleaner that will clean antique watches and clocks that have protective coatings on them – this is your cleaner. Zenith’s chemists made this product equal in cleaning power to ammoniated water based products.
Now there is no need to subject yourself or others to harmful ammonia fumes during the cleaning process. Ask for Product 251 NA, you will be glad you did. One gallon makes 8 gallons. Rinse with water and immediately dry in the heating chamber or blow dry.