Rust is a persistent problem for metal surfaces, especially when parts are exposed to moisture, salt, or fluctuating temperatures. Using the best rust preventative can help protect these surfaces and prevent corrosion from developing, which can weaken structural components, damage equipment, and lead to costly repairs or rejected products.
Choosing the best rust preventative depends on several factors, including the metal type, environmental conditions, and the duration of protection required. Some rust preventatives form protective coatings on the metal surface, while others provide vapor-phase protection that reaches hard-to-access areas.
In this guide, we review several common types of rust preventatives and their strengths, so you can identify the best rust preventative for your specific application.
Oil-Based Rust Preventatives
Oil-based corrosion inhibitors are among the most widely used rust preventatives in industrial applications. They form a thin protective film that blocks moisture and oxygen from reaching the metal surface.
These products are easy to apply by spraying, dipping, or brushing. However, they may leave an oily residue and often require cleaning before the part moves into the next manufacturing step.
Common ZERUST® oil-based rust preventatives include:
Oil-based rust inhibitors work well for temporary storage, shipping protection, and parts that require lubrication, along with corrosion protection.
Oil-Based with VCI Technology
Some applications require protection beyond the surface coating. Oil-based products that contain Vapor Corrosion Inhibitor (VCI) technology provide an additional layer of defense.
VCI molecules slowly vaporize and disperse throughout enclosed spaces such as engines, gearboxes, and packaged equipment. These molecules settle on metal surfaces and interrupt the electrochemical process that causes corrosion.
ZERUST® products in this category include:
These products are often used when protecting internal metal surfaces during storage, shipment, or equipment lay-up.
VCI Oil Additives for Internal System Protection
In some cases, adding corrosion protection directly to an existing lubricant or oil system provides the best rust preventative solution.
ZERUST® Axxanol™ VCI oil additives protect internal metal surfaces in engines, hydraulic systems, and other enclosed equipment during lay-up, transportation, or storage.
Depending on the length of protection required, several formulations are available:
These additives release protective vapor-phase corrosion inhibitors that protect surfaces both in contact with the oil and above the oil line.
Solvent-Based Rust Preventatives
Solvent-based rust preventatives create a thin protective coating that dries quickly after application. The solvent evaporates, leaving behind a corrosion-resistant film on the metal surface.
These products are commonly used when a fast-drying rust preventative is required or when minimal coating thickness is desired. Many solvent-based products are ideal for protecting parts during short-term storage or transportation.
ZERUST® solvent-based options include:
- Axxanol™ 33CD
- Axxanol™ 33CD-HF
- Axxanol™ 34CD
- Axxanol™ 34CD-HF
- Axxanol™ A35CD-7
- Axxanol™ A35CD-32
- Axxanol™ 718-ESS
Solvent-based rust preventatives are often selected when quick drying time and ease of application are important.
Wax-Based Rust Preventatives
For metal components exposed to outdoor environments, wax-based coatings can provide some of the best rust preventative performance for long-term protection.
These coatings form a thicker barrier that resists water, salt spray, and environmental exposure. Because of this durability, wax-based rust preventatives are commonly used for outdoor storage, marine equipment, and heavy industrial components.
The main drawback is that wax coatings may require solvents or mechanical cleaning to remove before the part is used.
See How ZERUST® Outdoor Coatings Protect Metal in Harsh Environments
Discover how ZERUST® AxxaCoat™ 90B-HFS replaced a traditional hot melt coating to protect metal parts stored outdoors. This real-world case study shows how advanced rust preventatives can improve corrosion protection while simplifying application and removal.
Water-Based Rust Preventatives
Water-based rust preventatives provide corrosion protection while reducing environmental impact and improving workplace safety. These products form a protective barrier against moisture and corrosive contaminants.
They are easy to apply, dry quickly, and often work well in production environments that require clean processing.
ZERUST® water-based rust preventatives include:
These products are commonly used in manufacturing lines, metalworking operations, and temporary protection during production processes.
Water-Based with VCI Protection
In some situations, corrosion protection must reach hidden areas such as cavities, internal passages, or complex assemblies.
Water-based rust preventatives that contain VCI technology can be fogged or sprayed into enclosed spaces. The corrosion-inhibiting molecules disperse through the air and protect metal surfaces even in difficult-to-reach areas.
ZERUST® products in this category include:
These products are commonly used to protect equipment interiors, tanks, pipelines, and enclosed mechanical systems.
Water-Based Additives
Some corrosion challenges occur inside closed-loop systems, such as hydrostatic testing systems, cooling loops, or water circulation systems.
Water-based rust preventative additives can be mixed directly into the system water to prevent corrosion during testing or temporary operation.
ZERUST® additives designed for these applications include:
These additives are commonly used in hydrostatic testing, closed-loop systems, and temporary corrosion protection during equipment commissioning.
Dual-Action Water-Based Rust Preventatives and Cleaners
ZERUST® Axxatec™ DA (Dual-Action) products combine light cleaning and corrosion protection in a single step.
These low-foam water-based solutions remove light hydrocarbon soils while leaving behind a thin protective film that prevents rust. The coating dries clear and remains dry to the touch, making it suitable for production environments.
Axxatec™ DA products are often used for spray applications, dip processes, or inline manufacturing operations.
Examples include:
These products help protect parts between manufacturing steps and during short-term storage or shipment.
Grease-Based Rust Preventatives
For components exposed to heavy loads or friction, grease-based products can provide the best rust preventative protection while also serving as lubricants.
They are commonly used on gears, bearings, and mechanical assemblies that require both corrosion protection and lubrication.
Grease-based coatings are also frequently used for outdoor storage applications. Equipment, spare parts, and structural components stored outside may be exposed to rain, condensation, salt, and large temperature swings. A thicker grease-based rust preventative forms a durable barrier that helps shield metal surfaces from moisture and environmental contaminants.
This type of coating is often selected when parts must remain protected for extended periods in storage yards, construction sites, marine environments, or other harsh industrial settings. The protective grease layer helps maintain equipment condition until it is placed into service.
However, grease-based coatings can attract dirt and debris and may require cleaning before equipment operation.
Examples include:
Explore ZERUST® Rust Preventative Solutions
Looking for the best rust preventative for your application? Download the ZERUST® corrosion inhibitors and rust preventatives brochure to explore oil-based, water-based, VCI, wax, and grease-based solutions designed to protect metal during manufacturing, storage, and shipment.
Choosing the Best Rust Preventative for Your Application
There is no single product that serves as the best rust preventative for every situation. The right solution depends on:
- The type of metal being protected
- Environmental conditions such as humidity or salt exposure
- Storage or shipping duration
- Application method and production process requirements
ZERUST® corrosion specialists work with manufacturers to identify the root cause of corrosion and recommend the most effective protection strategy.
This process may include:
- Fluid audits
- Packaging process evaluations
- VCI protection analysis
- Environmental data logging
By combining the right rust preventative products with proven corrosion management methods, ZERUST® helps manufacturers protect metal assets and reduce costly corrosion damage.
Need Help Finding the Best Rust Preventative?
Selecting the best rust preventative often requires more than choosing a product. The ZERUST® Z-CIS® Corrosion Identification System helps identify the root causes of corrosion and develop a proven protection strategy. Our corrosion specialists evaluate your process, environment, and materials to recommend the most effective solution.
Tom White
Tom White is the Marketing Manager at ZERUST®, bringing almost a decade of expertise in Vapor Corrosion Inhibitor (VCI) technologies and corrosion prevention solutions. He leads strategic marketing initiatives that showcase ZERUST®’s global product portfolio, from sustainable VCI packaging films to advanced rust preventatives and cleaners. Tom is deeply involved in product launches, trade show planning, digital marketing, and customer engagement, ensuring that ZERUST®’s innovative solutions reach the right industries and decision-makers. With a strong focus on aligning technical expertise with customer needs, he helps drive the brand’s growth and strengthen its position as a leader in corrosion protection worldwide.
