Castrol Rustillo Aqua 639 Water-Soluble Rust Preventatives

To achieve effective adhesion, apply Rustilo Aqua 616 to surfaces that are completely free of oils, greases, acids, soaps, and other foreign materials. The presence of water, unless excessive, will not interfere with adhesion or film forming characteristics. Parts must be dried before stacking. Rustilo Aqua 616 is a low viscosity liquid, and is applied by any method or technique adapted to the particular application—flow coat, roll coater, mechanical wipe, immersion, or spray. Whenever a spray technique is selected for application, a well-atomized spray is recommended. Repeated strokes over the spray pattern are necessary to ensure a thin, even coat. Care must be taken to avoid spraying a dry or partially dry pattern, since a dry spray will dull the final gloss. The ideal spray gun is one that combines a comparatively high capacity air cap with a low capacity nozzle, resulting in a large volume of air mixed with a relatively small volume of material. Internal and external air mix spray techniques are satisfactory for Rustilo Aqua 616 application, as is airless spray. In all cases, the atomization air pressure should be kept high (from 65 – 70 pounds). Avoid inhalation of product in spray application. Rustilo Aqua 616 dries tack-free under ambient conditions in approximately 20 minutes. Drying can be accelerated by application of heated air and increased air velocity. Drying time can also be reduced by heating parts prior to application of coating. The dry film of Rustilo Aqua 616 can be removed by using a petroleum solvent or alkaline process cleaner, all available from Castrol. Complete and efficient removal is a function of cleaner concentration, operating temperature, and contact/agitation time. Working dilutions of Rustilo Aqua 616 should be determined by the end user. Rustilo Aqua 616 can be diluted with tap water, however, if the local water is very hard, use deionized water. For maximum protection and durability, use at full strength.