What Is the Best Rust Preventative for Your Application?

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:

• Axxanol™ 33
• Axxanol™ A35-30
• Axxanol™ A35-8030
• Axxanol™ 46-BIO
• Axxanol™ 750-NV
• Axxanol™ 758-NV

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:

• Axxanol™ 750 VCI Oil
• Axxanol™ 758 VCI Oil

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:

• Axxanol™ 707C
• Axxanol™ 710C

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.

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:

• Axxatec™ 30C
• Axxatec™ 48C
• Axxatec™ 80C

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:

• Axxatec™ 85-F
• Axxatec™ 87-M
• Axxatec™ 87-MB
• Axxatec™ 87-MW3

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:

• Axxatec™ 8110C
• Axxatec™ HST-20L
• Axxatec™ HST-M100

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:

• Axxatec™ DA-23C
• Axxatec™ DA-24C
• Axxatec™ DA-40AL

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:

• Axxanol™ Spray-G
• Axxanol™ Z-Maxx

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.

Tom White

Tom White is the Marketing Manager at ZERUST®, bringing nearly a decade of experience in Vapor Corrosion Inhibitor (VCI) technologies and corrosion prevention solutions. He holds a degree in marketing from St. Cloud State University and specializes in translating complex technical solutions into clear, effective messaging that resonates with industrial audiences.

In his role, Tom leads strategic marketing initiatives that promote ZERUST®’s global product portfolio, including sustainable VCI packaging films, rust preventative coatings, and industrial cleaning solutions. He works closely with technical teams, sales leaders, and international partners to ensure that product positioning aligns with real-world applications and customer needs across industries such as manufacturing, transportation, and infrastructure.

Tom is actively involved in product launches, trade show planning, digital marketing strategy, and content development. His work focuses on connecting ZERUST®’s corrosion prevention technologies with engineers, manufacturers, and decision-makers who rely on effective asset protection and operational reliability.

With a strong emphasis on customer engagement and market insight, Tom helps bridge the gap between technical expertise and business impact. He supports initiatives that highlight how corrosion prevention improves equipment lifespan, reduces downtime, and contributes to more sustainable operations.

Through his contributions to the ZERUST® blog, Tom shares insights on corrosion prevention strategies, industry trends, and product applications. His content is designed to educate and inform while helping organizations identify the right solutions to protect valuable metal assets and optimize long-term performance.

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