DI-525 Water-based Hard Film Rust Preventative is a single-component water-based hard film rust inhibitor that provides effective rust protection for metal products and components during processing, storage or transportation. By forming a physical protective barrier on metal surfaces, it can effectively prevent rust formation. It can be applied to metal surfaces by dipping, spraying or brushing, and after drying into a film, it can provide anti-corrosion and rust prevention, protecting metal surfaces. The product is easy to apply, and the film formed has stable mechanical and chemical properties with good isolation performance.

Main Applications
Suitable for rust prevention during processing and storage protection of cast iron, aluminum alloy, carbon steel, alloy steel, mold steel and other materials

Key Features
• Good adhesion to metals
• Excellent wetting and film-forming properties on metal surfaces
• Good barrier properties, waterproof and moisture-proof, with excellent anti-corrosion performance
• No sagging during application, prevents flash rust
• Stable physical and chemical properties, no reaction with metal surfaces
• Fast drying, forms film at room temperature (>5︒C)
• Forms smooth, transparent and glossy film (can be colored)
• Water-based environmentally friendly material, free of organic solvents, safe and eco-friendly

Protection Performance

Test Method	Dry Film Thickness (μm)	Rust Prevention Time (hours)
ASTMB117  (Salt Spray Test)	12	64
	25	168
	50	800

Physical Properties
Appearance: Milky white liquid
Solid Content (by weight): 45±2%
pH Value: 7.5-8.8
Viscosity at 25℃: 500-1000mPa.s
Application Methods: Dipping, spraying or brushing (recommended dry film thickness above 50μm)

Shelf Life: 12 months in unopened original packaging, protect from freezing

Precautions
Stir thoroughly before application
During application, ambient temperature and substrate temperature must be above +5℃