WD-40 Specialist Corrosion Inhibitor – Long-Lasting Anti-Rust Spray, 6.5 oz

Protect metal parts with long-lasting rust inhibition

WD-40 Specialist Corrosion Inhibitor delivers a durable protective layer that helps block air and moisture from reaching metal surfaces. Designed for preventative maintenance, it performs well in demanding environments while remaining easy to apply. This non-drying coating is formulated to stay where you spray it, making it a reliable option for tools, machinery, and gear exposed to rust risks.

Long-lasting protection for outdoor and indoor use

When used outdoors, the coating can guard metal parts for up to one year, while indoor applications may extend protection up to two years. This variance helps you tailor treatment for storage, high-humidity spaces, or active environments where moisture and temperature swings are common.

The product supports corrosion prevention in extreme conditions, including hot, humid, or cold climates. It creates a barrier that helps minimize the effects of exposure without requiring frequent reapplication, which can streamline maintenance routines and reduce downtime.

Key benefits and practical features

• Protective barrier: Coats metal to block air and moisture, helping reduce rust and corrosion over time.
• Indoors vs outdoors: Up to two years of protection indoors; up to one year outdoors (vary by exposure).
• Precision application: Included straw enables a precise stream for targeted coating and easier reach in tight spots.
• Non-drying formula: Won’t run or wash away where you spray it, maintaining a clean, even film.
• Compliance and trust: 50-state VOC compliant and NSF Category A7, supporting safe, professional maintenance.

Usage tips: Apply a thin, even coat to clean, dry metal surfaces. Allow to air dry. Reapply as part of preventative maintenance, especially on equipment stored for extended periods or used in humid environments. The product is designed to stay where you spray it, reducing drips and mess while protecting critical components.

Real-world scenarios

From workshop benches and hand tools to stored machinery and outdoor equipment, this corrosion inhibitor is engineered for preventive care in storage rooms, garages, and field settings. Its performance is geared toward users who want a dependable, re-coatable coating that doesn’t require aggressive maintenance rituals, yet provides solid protection under typical rust-promoting conditions.