Glo-Protek ZeroSalt 121

Salt Remover / Flash Rust Inhibitor

Glo-Protek ZeroSalt 121 is an additive that prevents flash rusting of wet abrasive- and water-blasted iron and steel surfaces and of dry blasted surfaces in a pressurized wash down. It also removes chlorides and other salts and contaminants very effectively.


  • Soluble in water
  • Non-hazardous
  • Biodegradable
  • Phosphate free
  • Non-flammable
  • With no rain, temperature above 6°C, rusting will be prevented for about 48 hours, often longer
  • Raises pH of blasting water to help compensate for acidic sand
  • Colorless
  • Leaves no residue
  • Surface salts, including chlorides, undetectable after use
  • Product chemistry approved by the FDA for food grade services


Mass Density : Approximately 62.43 lb/cu.ft. (1g/cm3)

Minimum Time before coating : Priming should be done as soon as possible, before flash rust appears and after the surface is dry. Some primers can be applied even when the surface is still damp, provided it is free from visible droplets or running water, but a dry substrate is always preferred.

Typical Time before coating : 48 hours, or longer with favorable weather conditions -- no rain, temperature above 6°C

Shelf Life : 1 year stored in cool & dry place. Do not store below 2°C to avoid freezing.


ZeroSalt 121 is typically used in both blast water and wash down water. (See note on below.) It is diluted with water 50 to 150 to one, depending on the application, humidity, and level of surface contamination. It is rarely necessary to dilute it less than 50 to one and frequently possible to dilute it much more. In some cases it may be used only in the wash down: after ultra high pressure (UHP) water blasting or after dry blasting. UHP users should always consult their equipment manufacturer concerning the use of ZeroSalt 121 or any other additives in their equipment.

In high humidity environments with highly contaminated substrates (e.g., steel plate used in ocean service or exposed to air), 50 to one may be necessary for both cycles. With low humidity and a relatively clean surface, 100 to 150 to one dilution on the blast cycle and 100 to one on the wash down should be satisfactory. Until a job begins, assume an average of 100 to one for all the water you plan to use. If testing various dilutions of ZeroSalt 121 is not practical, 50 to one is the safe dilution for both cycles. In wash downs: always use ZeroSalt 121 never dilute more than 100 to one (more for some UHP uses); and use HoldTight7102-treated water at 1-3 gpm (3.8-11.4 Lpm), at no less than 500 psi (34 bars).


Water that contains a high concentration of salts, carbonates and bicarbonates (i.e., Α hard water), or other contaminants may interfere with the performance of ZeroSalt 121. Hard water may also be a problem for some equipment.
To avoid pooling of inhibitor-treated water, for example on flat areas, excess water should be blown away with oil-free compressed air.
Though you will usually have a 48-hour or larger window, it is good practice to prime as soon as possible after the surface is dry and before flash rust appears.


Wear eye protection when handling this or similar products. In case inhibitor gets into eyes, flush with water for 5-10 minutes. See a doctor if irritation persists. Inhalation of vapor of undiluted inhibitor may be harmful to some individuals