Herschell Cold Zinc Protector 400ml

Herschell Cold Zinc Protector is a high-performance, zinc-rich coating designed to provide long-term galvanic protection to iron and steel surfaces. Often referred to as "Cold Galvanizing," this aerosol spray creates a sacrificial layer that protects the base metal from rust and corrosion, even if the coating is scratched or damaged.

Technical Specifications

• Base: Epoxy Ester resin with ultra-pure Zinc dust (Zn).
• Zinc Content: High percentage in the dry film (usually 90+).
• Finish: Matte Grey (matches the appearance of hot-dip galvanizing).
• Drying Time: Touch dry in 10–15 minutes; Full cure in 24 hours.
• Temperature Resistance: Up to 200°C (continuous) / 300°C (intermittent).
• Volume: 400ml Aerosol.

Key Features

• Galvanic Protection: Unlike standard paint which only acts as a barrier, the zinc in this spray acts as a "sacrificial anode." In the presence of moisture, the zinc corrodes instead of the steel underneath.
• Self-Healing Properties: If the surface is scratched, the surrounding zinc particles react to "seal" the breach, preventing rust from creeping under the coating.
• Weld-Through Capability: Because it is highly conductive, you can weld through a thin layer of Cold Zinc without excessive spatter or compromising the integrity of the weld.
• Primer or Topcoat: Can be used as a standalone protective finish or as a high-performance rust-preventative primer for subsequent painting.
• Salt Spray Resistance: Excellent performance in coastal and marine environments where standard paints fail quickly.

Common Applications

• Weld Repairs: Restoring corrosion protection to the "heat-affected zone" after welding galvanized pipes or sheets.
• Automotive: Protecting chassis rails, tow bars, exhaust welds, and internal body panels.
• Fencing & Construction: Repairing scratches on palisade fencing, gate motors, and structural steel beams.
• Marine: Protecting boat trailers, outboard motor brackets, and dock hardware.
• DIY: Rust-proofing garden tools, wrought iron furniture, and metal sheds.

Usage Tips

1. Surface Prep is Critical: For the "sacrificial" chemistry to work, the zinc must be in direct contact with the metal. Remove all loose rust, scale, and old paint using a wire brush or sandpaper. Clean with Herschell .A. Weld Cleaner to ensure the surface is oil-free.
2. Shake Vigorously: Zinc dust is heavy and settles quickly. Shake the can for at least 2 minutes after the mixing ball starts rattling to ensure a uniform mixture.
3. Thin, Multiple Coats: Apply 2 or 3 light coats rather than one thick one. This prevents sagging and ensures a more durable bond.
4. Invert to Clear: After use, turn the can upside down and spray for 2 seconds to clear the nozzle. This prevents the heavy zinc from hardening and blocking the valve.