Selecting the right engine storage rust preventative is critical when preserving engines, gearboxes, hydraulic systems, or other enclosed lubricated equipment during long-term storage or lay-up. These systems often contain void spaces where conventional lubricating oils drain away, leaving metal surfaces exposed to condensation and humid air.
To address these challenges, ZERUST® offers two advanced solutions: Axxanol™ 707C and 710C, which are specifically engineered for protecting engines, gearboxes, hydraulic systems, and other enclosed lubricated machinery during long-term storage, shipment, or field lay-up. Both products are vapor corrosion inhibitor (VCI) oil additives that provide protection to metal surfaces inside sealed systems where conventional lubricating oils may drain away, leaving void spaces vulnerable to corrosion caused by condensation and humid air.
ZERUST® Axxanol™ 707C is a vapor-only corrosion inhibitor concentrate designed for use with compatible lubricating oils. When blended at a concentration of approximately 3–10%, it emits protective VCI molecules that migrate to exposed surfaces within the voids of engines, gearboxes, and hydraulic systems, providing up to two years‡ of corrosion protection in closed systems. It is compatible with most engine, diesel, hydraulic, and gearbox oils (excluding PAG-based oils) and offers multimetal protection for ferrous, cast aluminum, and brass substrates.
For extended storage durations, ZERUST® Axxanol™ 710C provides enhanced, dual-action corrosion protection through both contact and vapor inhibition. It is formulated as an oil additive that protects for up to five years‡ in closed systems by releasing VCI molecules that migrate into hard-to-reach internal. Like 707C, it is compatible with a wide range of lubricating oils and elastomers and is free from barium and heavy metals, meeting TSCA, RoHS, and REACH compliance requirements.
Both products are simple to apply; just premix the concentrate with fresh lubricating oil before filling the system. Once applied, ZERUST® recommends turning the engine or gearbox over periodically (for example, 1–2 minutes each month) to optimize inhibitor distribution. Prior to returning equipment to service, the system should be drained and refilled with fresh operational oil to ensure peak performance.
These solutions function as the ideal engine storage rust preventative for lay-ups, mothballing, or long-term preservation of critical equipment such as gearboxes, engines, and hydraulic systems. As part of the ZERUST® Z-CIS® (Corrosion Inhibiting System) methodology, ZERUST® creates a comprehensive, system-based corrosion protection program. For detailed application guidance and compatibility recommendations, refer to the product Technical Data Sheets or contact your ZERUST® representative for customized storage and protection strategies.
Axxanol™ 707C VCI oil additive is a vapor-phase-only corrosion inhibitor concentrate specially designed for use with lubricating oils. Furthermore, it provides corrosion protection of metal surfaces within the void spaces of closed systems, such as internal combustion engines, transmissions, gearboxes, hydraulic systems, or other sealed, lubricated systems.
Axxanol™ 710C is an anti-corrosion oil additive that protects using ZERUST® Contact Inhibitors and Vapor Corrosion Inhibitors (VCI). Furthermore, it provides corrosion protection of metal surfaces within the void spaces of closed systems, such as internal combustion engines, transmissions, gearboxes, hydraulic systems, or other sealed, lubricated systems.
