Coo-Var Zinc Phosphate Primer - Grey

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

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.

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.

Q. What is zinc phosphate primer and what is it used for?

A. Zinc phosphate primer is a high-performance metal primer that contains zinc phosphate as an active ingredient. It’s specifically formulated to provide excellent corrosion resistance and strong adhesion on ferrous metal surfaces like steel and iron. Commonly used on structures such as fire escapes, metal gates, railings, and garage doors, it acts as a durable protective base coat that prevents rust and extends the lifespan of topcoat finishes. Ideal for both indoor and outdoor applications, especially in harsh or coastal environments.

Q. Why should I use zinc phosphate primer before painting metal?

A. Using a zinc phosphate primer before painting metal offers several key benefits:

• Corrosion protection: It prevents rust and oxidation, especially in exposed or humid conditions.
• Superior adhesion: It forms a strong bond between the metal surface and the topcoat, reducing peeling or flaking.
• Increased durability: It provides a stable, long-lasting foundation for your paint system.
• Versatility: Suitable for use on a wide range of ferrous metals, and even some non-ferrous metals when properly pre-treated.

This makes zinc phosphate primer a go-to solution for long-term protection and performance on structural and decorative metalwork.

Delivery - All orders placed on a working day before 3pm will be dispatched on the same day for next working day delivery. Orders placed before 3pm on Friday will be delivered on Monday (excluding bank holidays). Orders placed on weekends and Bank Holidays will be dispatched on the next working day. 

Delivery of Tinted Products - Tinted paints are dispatched in line with our express order process, shown below. However, due to their bespoke nature, please allow up to an additional 5 working days to accommodate any potential courier delays or delivery issues before receiving a refund or replacement.

We strongly suggest customers avoid booking tradespeople until they receive their order. Next Day Paint will not be held liable for any costs incurred due to order processing errors, delivery delays, or other issues that may result in financial loss.

Delivery Options

Express Shipping - £3.99

Order by: 3pm, Monday - Sunday

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

AM Delivery - £12.99

Order by: 2pm, Monday - Sunday

Expected delivery: Next working day by 2pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following AM

Late Cut-Off - £5.99

Order by: 4pm, Monday - Friday 

Expected delivery: Next working day, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

Saturday Delivery - £9.95

Order by: 2pm, Friday 

Expected delivery: Saturday, 8am - 9pm

Standard Delivery (Out of Zone Postcodes Only) - £6.99

Order by: 3pm, Monday - Sunday 

Expected delivery:  3-5  working days, 8am - 9pm

Orders placed on weekends or bank holidays will be dispatched on the next working day for delivery on the following day

We do not deliver to the Channel Islands or the Republic of Ireland

Certain postcodes delivery times and charges may vary please head to the cart to see your available delivery options.

Returns

We offer a 14 day money back guarantee for all goods shipped correctly that are not required. If the item is not required, please send the item back for a full refund in its original condition, unused with its original packaging. Please note return for unwanted item is at your own expense.

Contact us as soon as possible to inform us you will be returning the product either by a contact form or by calling our team on 0161 960 0217.

All tinted paint purchases are final and non-refundable. If you're unsure about your selection, please refer to the product listing or contact us for guidance before ordering. Once mixed, tinted paints cannot be returned or refunded, regardless of delivery delays or changes in circumstances.

While we aim to meet delivery timelines, we are not responsible for delays caused by couriers, weather, or other external factors.

We recommend ordering samples or colour charts before purchasing. While we strive to represent colours accurately, screen settings and surface types can affect appearance. Opened tins cannot be returned due to dissatisfaction with colour.

For non-tinted products, we offer a 14-day money-back guarantee. Items must be returned unused, in original condition and packaging, at your own expense.

Damaged Paint

Please visit our damages page, where we can help resolve the issue for you. 

Incorrect Item

If we have sent you a different item from what you ordered, we will be happy to organise an exchange for the correct goods at no extra charge to yourself, please get in touch to organise this.

Faulty Items

Faulty items can be refunded or exchanged within 30 days. All returns are tested, and if no fault is found, no refund will be issued you'll have the option to have the item returned. For faults discovered after 30 days, please contact the manufacturer for further support.