Corrosion Preventatives

Castrol Rustilo 4163
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Neat corrosion preventive oil


Castrol Rustilo 4163 is an oil-dispersed and fingerprint suppression corrosion preventive formulated to give long-term indoor protection. This product deposits a thin, slightly oily residual film, which is easily cleaned using an alkaline cleaner or vapour degreaser.


Use Castrol Rustilo 4163 where:

  • Operations expose the metal to water-containing machining and grinding coolants, cleaners, and water rinses.
  • Parts are manually inspected or packaged
  • Long-term indoor humidity protection is needed.
  • Ease of cleanability is desired.
  • This product will provide excellent humidity protection for ferrous and nonferrous parts for up to two years in indoor storage.
  • High flash point eliminates need for special fire equipment.
  • Barium-free
  • Excellent resistance to acid atmosphere for ferrous and nonferrous parts, which have been stored in or near acidic environments.
  • Handled parts are fully protected from fingerprint corrosion because of specially formulated additives.
Viscosity 7 mm/s² at 40°C
Metal type Cast Iron, High alloy steel / Stainless steel, Low / Med alloy steel
Corrosion protection Indoor Storage
Formulated without Heavy Metal Yes
Product type Surface Treatments
Applicable to these sectors Aerospace, Automotive Manufacture, Machinery, Metal Goods, Metals

User Advice
Recommended applications For best results, Rustilo 4163 should be applied by dip, flood or spray method.

Additional Information
The claims on film thickness and consumption are average values. These are valid for smooth surfaces with good drain-off characteristics and simple geometries without holes or recesses. “Indoor storage” describes the storage of ferrous components in closed store-rooms having a relative humidity of 60%. Increased protection times could be achieved when treating finished surfaces or store the parts in a sealed pack. “Outdoor storage” describes open storage, which assumes primary protection from the elements by tarpaulin or
other form of cover. Influence of temperature may cause some cloudiness, which is reversible and doesn’t have an impact on product quality. If required protective films of Rustilo 4163 can be removed by using a petroleum solvent or alkaline process cleaner, all available from Castrol.

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