Overview

Give your metalwork the protection it deserves with Coo-Var Zinc Phosphate Primer, a high-performance, anti-corrosive primer designed for use on iron, steel, aluminium, and even mixed material surfaces like wood/metal combinations. Whether you're painting fire escapes, metal gates, garage doors, or window frames, this industrial-grade primer delivers superior adhesion and long-lasting rust resistance even in harsh coastal environments.

Stronger and more reliable than standard DIY primers, it’s the go-to choice for both professionals and serious DIYers who need a durable foundation that holds up under pressure. One primer, multiple surfaces Coo-Var Zinc Phosphate Primer simplifies your prep and strengthens your finish.

• Promotes adhesion
• Suitable for most metals
• High durability primer - ideal in coastal areas
• Anti corrosive properties

Preparation

Proper surface preparation is essential to ensure maximum adhesion and corrosion resistance when using Coo-Var Zinc Phosphate Primer. Follow these steps for best results:

General Preparation (All Surfaces)

• Ensure surfaces are clean, dry, and free from grease, oil, dust, and other contaminants.
• Remove all loose or flaking material before applying the primer.
• Use a degreaser to thoroughly clean oily or greasy surfaces before any mechanical preparation.

Bare Steel Surfaces

• All rust, mill scale, and surface contaminants must be removed.
• Recommended preparation method: Abrasive blast cleaning to SA 2½ standard for optimal performance.
• If blast cleaning is not practical: Use mechanical cleaning (e.g. wire brushing, grinding) as a second-best alternative.
• Note: Hand cleaning alone is not sufficient for proper surface preparation.

Welded and Assembled Structures

• When blast cleaning is performed after assembly, give special attention to edges, corners, bolts, nuts, and weld seams
• Remove all weld spatter, slag, and residue.
• If needed, grind welds smooth to eliminate irregularities that could affect primer adhesion.

Thorough surface prep ensures Coo-Var Zinc Phosphate Primer delivers its full anti-corrosive potential.

Application

To ensure a durable and effective protective coating, follow these application guidelines carefully:

• Mix thoroughly before use to ensure even consistency and pigment distribution.
• Confirm that the surface has been properly prepared as per surface preparation guidelines.
• Ensure ambient and surface temperatures are above the dew point to prevent moisture contamination.
• In confined or poorly ventilated areas, provide adequate ventilation during both application and drying.
• Apply using a brush, roller, or spray in accordance with good painting practices.
• Apply an even coat for best coverage and performance.
• Allow to dry fully before applying a suitable topcoat.

Coo-Var Zinc Phosphate Primer is designed to be used under a variety of compatible topcoats, excluding those classified as Rapidry.