I agree that HF/ABF is an excellent, inexpensive cleaner. Chemical companies have spent a great deal of money to come up with a substitute without success. However one must examine the risk versus reward for using it. I have been to a factory that manufactures HF. The employees involved in the process are dressed like astronauts. The plant is equipped with more safety controls than any other I have ever seen. The main use for it is to clean computer parts in small amounts in labs equipped with expensive environmental controls or etching glass. The chemists involved could not believe that anyone would consider using it in an open, uncontrolled environment like a car wash.
In my early days it was the key ingredient in the low pH application in touch free washes. In addition to destroying pumps it ate up concrete and in some cases entire sections of conveyors had to be replaced due to degradation cause by HF/ABF. I know you feel you take extraordinary precautions but it takes only one mistake by one using HF/ABF to potentially create serious consequences for you and your wash in terms of financial liability and physical harm. Diligent, regular use of many of the other wall/equipment cleaners on the market today will produce the same results that HF/ABF does with a much reduced risk of harm.
Here is information anyone using or considering using HF/ABF should be aware of
• HF is one of the strongest inorganic acids available, used primarily for industrial purposes (i.e., etching glass, petroleum refining, and electronics manufacturing under a highly controlled environment)
• When using HF at any known concentration that will clean, it will corrode most metals including stainless steel, attack concrete, pit glass, and negatively effect most painted surfaces.
• HF is considered Toxic and therefore a known poison when absorbed through the skin, ingested or inhaled. The effects of the exposure may vary based on exposure time, concentration, surface coverage and the size of the person.
• HF in a concentration above 0.5% may result in severe ocular damage to the eye. Fume exposure commonly causes eye irritation and can also cause ocular injury. Signs and symptoms may be delayed.
• OSHA’s maximum permissible respiratory exposure limit is 3 parts per million average exposure in an 8-hour period.
• Many insurers will not issue policies if they are aware that these products are being used, so be sure to check with your carrier for coverage if you are planning to use HF/ABF at your wash.