Product Description

The Mobilarma 700 Series contains three premium performance rust preventives that cover a range of applications including storage and inter-operational activities. The Mobilarma 777 and 778 are intended for protection cold-rolled sheet and coiled steel in the metal industry. Mobilarma 798 is intended for the lubrication and rust protection of wire rope in industrial, construction, mining and marine applications. The Mobilarma 700 Series products exhibit excellent water displacing properties and form thin tenacious films that protect surfaces even under severe conditions that include high moisture levels and exposure to acid or corrosive fumes.

The Mobilarma 777 and 778 form wet, oily and extremely thin barrier films that are not tacky so that they will not attract dirt or other foreign matter. They will protect sheet and coiled steel for up to twelve months, even under severe conditions that include variations in humidity and exposure to acid fumes that might be found in the vicinity of pickling operations.

Mobilarma 798 forms a grease-like film that protects wire ropes from corrosion tendencies of salt spray and moisture- laden atmospheres. It is effective throughout the extremes of temperature that may be encountered at sea and gives good protection against mild acids. It is pliable at –35ºC and will not drip at 60ºC. It resists throw-off in high-speed service and adheres without being tacky or stringy. The film is self-healing and does not chip.

Features and Benefits

Mobilarma 777 and 778 provide an effective and cost efficient means of protecting cold-rolled sheet and coiled steel prior to processing and during storage. They provide extended protection, even under severe storage conditions resulting in less reject and scrapped materials.

Mobilarma 798 works well between the strands of wire rope providing excellent lubrication as well as protective films. These characteristics reduce wear and improve life of the wire ropes as well as minimize maintenance costs associated with their use. It is compatible with other wire rope core impregnating materials that may have been applied during manufacture. It is easy to apply and economical to use.

Features Advantages and Potential Benefits
Effective rust and corrosion protection Less waste and lower costs
Easy application Less waste and lower costs
Economical to use Good coverage and protection with thin films


Mobilarma 777 and 778 are recommended for use as:

•  Protective coatings for cold-rolled sheet and coiled steel

•  Coatings for precision machined parts and instruments for storage

•  A die lubricant (Mobilarma 778) in some light duty pressing operation

Mobilarma 798 is recommended for use for:

•  Lubrication and preservation of strands and running ropes

•  Impregnation of steel wire ropes during manufacture

Properties and Specifications

Property 777 778 798
Density @ 15 C, g/cm3, ASTM D4052 0.86 0.88
Dropping Point, °C, ASTM D2265 63
Flash Point, Cleveland Open Cup, °C, ASTM D92 120 190 238
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445 23.1
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445 18 18
Pour Point, °C, ASTM D97 -6 -3

Health and Safety

Health and Safety recommendations for this product can be found on the Material Safety Data Sheet (MSDS) @


It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.