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Zinc Rich and Cold Galvanising Paints

How to paint mild steel to make it look galvanised - buy zinc-rich/cold galvanised paints from Rawlins Paints. Priming substrates suitably before overcoating with a suitable topcoat greatly improves adhesion, protection, longevity and coverage. Our zinc-rich/cold galvanising paints are ideal for application to damaged galvanised steel, whether on-site or spot repairs, or to mild-steel. Carboline, Hempel, Jotun, PPG, Rust-Oleum, Sherwin-Williams, Tikkurila, Tor, Zinga - all brands and manufacturers that specialise in zinc-rich/cold galvanising, and available at Rawlins Paints. Click for more info.

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Rust-Oleum Hard Hat...

Rust-Oleum Hard Hat 2185/1085 Galva Zinc

Available in dark grey. Aerosol spray providing cathodic protection with 90% pure zinc content in the dry paint film. For bare and galvanised steel surfaces. Resists up to 500 hours of salt spray testing. Touch dry in 10 minutes. Heat resistance up to 450°C.

Price £19.40 (incl. VAT)
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Rust-Oleum Hard Hat...

Rust-Oleum Hard Hat 2117/1017 Galva Zinc Alu

Available in a silver finish with aluminium particles. For use on galvanised steel surfaces and metal. Provides cathodic protection. Fast drying: touch dry in 20 minutes. Heat resistant up to 450°C. Suitable for corrosive environments and high humidity areas.

Price £15.72 (incl. VAT)
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Fosroc Galvafroid

Fosroc Galvafroid

Fosroc Galvafroid is a zinc rich coating formulated as an easily applied, cold galvanising protection against corrosion on all ferrous metals with a mid-grey, matt finish. Specifically designed to provide rust inhibiting protection to ferrous metalwork Complies with LU Standard 1-085 ‘Fire Safety Performance of Materials’ Please note:...

Price £49.54 (incl. VAT)
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Zinga

Zinga

Zinga is a one-component anti-corrosion zinc coating system that provides cathodic protection to steel comparable with hot-dip galvanising, with the added advantage that it can be applied as though it were a paint, and is certified to not spread flame or create smoke (BS476 parts 6&7). Can protect longer than hot-dip galvanising (at the...

Price £32.56 (incl. VAT)
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Rust-Oleum 2120 Galva Plus

Rust-Oleum Hard Hat 2120 Galva Plus

A fast-drying zinc/aluminium coating available in Silver. Ideal for touch-ups on galvanised steel surfaces. Resists 310 hours of salt spray testing. Contains lower zinc content and more aluminium. Recommended for light industrial exposures and corrosive environments. Ensures a metallic, matt finish for aesthetic consistency.

Price £14.22 (incl. VAT)
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Zinga Zingaspray

Zinga Zingaspray

The Zinga film galvanising system in the convenience of a 500ml aerosol spray can. Use to repair or touch up galvanising, damaged or old hot-dipped, other zinc coated structures or products previously treated with Zinga in marine structures, new steel and galvanising, cast-iron and aluminium alloys. Repair for worn or damaged hot-dip...

Price £27.08 (incl. VAT)
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Rust-Oleum 2180 Galva Expresse

Rust-Oleum Hard Hat 2180 Galva Expresse

Available in grey. Suitable for use on new, bare steel, and galvanized steel surfaces. Fast-drying. Provides excellent corrosion protection. Can be recoated with non-saponifiable coatings. Ideal for small areas, touch-up, and light industrial exposures.

Price £14.22 (incl. VAT)
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Teamac Zinc Rich Primer

Teamac Zinc Rich Primer

Available in Matt Grey. Three-pack primer designed for cathodic protection. For application on iron and steel to prevent corrosion. High concentration of metallic zinc for conductivity. Long-lasting corrosion resistance.

Price £43.40 (incl. VAT)
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Hempel Zinc Primer 16490

Hempel Zinc Primer 16490

Hempel Zinc Primer 16490 is a one-component, high molecular weight, quick drying, phenoxy coating with a high content of zinc. For professional use only For use as a protective primer on steel in severely corrosive environment, for repair of Galvosil and other zinc rich coatings, and galvanized steel In compliance with SSPC-Paint 20, type...

Price £81.50 (incl. VAT)
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International Interzinc 52

International Interzinc 52

International Interzinc 52 is a two component, metallic zinc rich epoxy primer which complies with the composition and performance requirements of SSPC Paint 20. It has been designed to provide excellent corrosion resistance in both maintenance and new construction situations.

Price £614.93 (incl. VAT)
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Nu-Steel Zinc Rich Primer

Hydron Nu-Steel Zinc Rich Primer

Nu-Steel High Build Zinc Rich Primer is high quality brushing primer for interior and exterior use giving good adhesion to mild steel surfaces, prior to overcoating with the appropriate finish. Having a high Zinc content provides excellent first coat protection, and can also be used as a weldable primer For use on properly prepared steel...

Price £114.16 (incl. VAT)
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Zinga Zingaluspray

Zinga Zingaluspray

Zingaluspray, a cross between the original Zingaspray and Aluspray in a handy 500ml aerosol spray can for touching up and repairing galvanising. Containing more aluminium flakes for a galvanised look, the spray still contains 92% Zinc in the dry film and provides cathodic protection to ferrous metals. Very economical - ideal for small...

Price £27.07 (incl. VAT)
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PPG SigmaZinc 19

PPG SigmaZinc 19

PPG SigmaZinc 19 is a one-component, zinc-rich epoxy primer with good anti-corrosive properties, and whilst designed for repair of two-component zinc epoxy primers and zinc silicate primers, PPG SigmaZinc 19 can also be used as a reconditioner for aged, derusted and galvanised steel. Dries at temperatures down to –10°C (14°F) Dry heat...

Price £101.47 (incl. VAT)
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Jotun Barrier

Jotun Barrier

Jotun Barrier is a two component polyamide cured zinc rich epoxy coating. From Jotun, this is a very high zinc dust containing product and it conforms to the compositional requirements of SSPC paint 20, level 2. Jotun Barrier provides very good corrosion protection as part of a complete coating system. To be used as primer in atmospheric...

Price £252.78 (incl. VAT)
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Jotun Barrier 77

Jotun Barrier 77

From Jotun, this primer is for structural steel and piping in highly corrosive environments, ideal for offshore environments, refineries, power plants, bridges, buildings, mining equipment and general structural steel. Jotun Barrier 77 is a two component polyamide cured zinc rich epoxy coating.

Price £238.58 (incl. VAT)
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Carboline Carbozinc 858

Carboline Carbozinc 858

Carboline Carbozinc 858 is a two-component, high-solids, zinc-filled epoxy primer for corrosion protection of structural steel in in salt and weathering environments. Protects steel galvanically Outstanding application properties Cures at low temperatures down to 2ºC Tough and abrasion resistant film Widely used within petrochemical-...

Price £222.77 (incl. VAT)
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Cromadex Monozinc One Pack Zinc-Rich Primer

Cromadex Monozinc One Pack Zinc-Rich Primer

Cromadex Monozinc One Pack Zinc-Rich Primer is a one pack, zinc-rich primer. Based on epoxy ester resin it is heat resistant to 400°C. It provides galvanic protection to new steelwork and can also be used to repair two pack zinc-rich primers. Monozinc contains more than 90% Zinc in the dry film. More Information Delivery Info

Price £119.92 (incl. VAT)
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Hempel Hempadur Avantguard...

Hempel Hempadur Avantguard 750 1736G

Hempadur Avantguard 750 is an activated, zinc epoxy primer with a higher mechanical strength. Recommended as a versatile primer for long-term protection of steel in severely corrosive environments including offshore. For professional use only Service temperature up to 160°C (dry exposure), and cures down to -10°C  In compliance with the...

Price £334.62 (incl. VAT)
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Hempel Hempadur Zinc 17360

Hempel Hempadur Zinc 17360

Hempadur Zinc 17360 is a two-component, zinc rich epoxy primer, that cures to a hard wearing and highly weather-resistant coating and offers cathodic protection of local mechanical damage. V.O.C.-compliant, versatile, long-term primer on steel for epoxy, vinyl and acrylic coating systems in medium to severely corrosive environments...

Price £324.64 (incl. VAT)
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Teamac Zinc Rich Primer...

Teamac Zinc Rich Primer Aerosol

Available in Grey. For cathodic protection of iron and steel surfaces against corrosion. Provides a protective barrier for direct contact with the metal. Excellent adhesion and conductivity, ideal for areas requiring cold galvanising. Professional use only.

Price £26.54 (incl. VAT)
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Cromadex Alu-Zinc Primer Aerosol

Cromadex Alu-Zinc Primer Aerosol

Cromadex Alu-Zinc Primer Aerosol is a high quality fast drying alu-zinc spray to treat galvanized and untreated steel. Resistant to petrol, chemicals and weather influences Spot-weldable and has excellent adhesion More Information Delivery Info

Price £41.50 (incl. VAT)
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Zinga Aluspray

Zinga Aluspray

Aluspray, a finishing coat that improves the aesthetic of Zinga in a handy and economical 500ml aerosol spray can. Ideal for spot treatment on small areas and touching up HDG, metallisation or previously treated Zinga surfaces. Efficient and solid Aluminium colour (~RAL 9006: comparable to hot-dip) Good resistance to mechanic shocks,...

Price £19.37 (incl. VAT)
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Hempel Hempadur Avantguard...

Hempel Hempadur Avantguard 550 1734G

Hempadur Avantguard 550 is an activated, zinc epoxy primer with a higher mechanical strength. Recommended as a versatile primer for long-term protection of steel in severely corrosive environments. For professional use only Service temperature up to 160°C (dry exposure), and cures down to -10°C  In compliance with the requirements of...

Price £278.69 (incl. VAT)
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Cromadex Monozinc Aerosol

Cromadex Monozinc Aerosol

A high quality fast drying zinc spray to treat galvanized and untreated steel. Resistant to petrol, chemicals and weather influences. Spot-weldable. Excellent adhesion. Contains more than 90% Zinc in the dry film. Suitable for overcoating with Cromadex 600, 700 & 800 two pack finishes only.

Price £32.64 (incl. VAT)
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PPG SigmaZinc 102 HS

PPG SigmaZinc 102 HS

PPG SigmaZinc 102 HS is a two-component, high solids polyamide cured zinc rich epoxy primer. Very good primer for systems with high solids epoxy buildcoats Can also be used as a system primer for various other paint systems Good anticorrosive properties Quick-drying, can be overcoated after a short interval Complies with SSPC-Paint 20...

Price £260.93 (incl. VAT)
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HMG Electrobond 7 Aerosol

HMG Electrobond 7 Aerosol

HMG Electrobond 7 Aerosol is a bare metal primer containing a high proportion of zinc dust. For the non-aerosol version of this product please see HMG Electrobond 7. 400ml/16oz Aerosol It gives high performance corrosion protection to ferrous metal Excellent adhesion, sacrificial and self-healing properties Cold galvanizing system Quick...

Price £24.46 (incl. VAT)
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International Interzinc 72

International Interzinc 72

International Interzinc 72 is a two component, metallic zinc rich epoxy primer, designed to provide excellent corrosion resistance both as a single coat and as a primer for a high performance coating system. Contains 90% zinc by weight in the dry film.

Price £441.37 (incl. VAT)
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Sherwin-Williams Zinc Clad...

Sherwin-Williams Zinc Clad J984BS

Sherwin-Williams Zinc Clad J984BS (formerly known as Epigrip J984BS) is a 2-pack epoxy zinc rich anti-corrosive protection primer for steel surfaces prepared by abrasive blast cleaning. It may also be used as a repair primer for galvanised surfaces. Please Note: This product is made to order subject to an extended lead time of approximately...

Price £463.60 (incl. VAT)
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Sherwin Williams Zinc Clad...

Sherwin Williams Zinc Clad IV EU

Sherwin Williams Zinc Clad IV EU (formerly known as Zinc Clad M501), is 2-pack epoxy zinc rich anti-corrosive primer for anti-corrosive protection of steel surfaces prepared by abrasive blast cleaning, and may be used as a repair primer for galvanized surfaces. Meets the performance requirements of ISO20340 (2009) as part of a three coat...

Price £603.22 (incl. VAT)
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Jotun Barrier 90

Jotun Barrier 90

A specially designed primer from Jotun with 90% zinc dust content for highly corrosive environments where extended durability is required. It is a very high zinc dust containing product that provides excellent corrosion protection as part of a complete coating system and is to be used as primer in atmospheric environments.

Price £235.76 (incl. VAT)
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International Interzinc 52

International Interzinc 52 (Winter Grade)

International Interzinc 52 (Winter Grade) is supplied with a winter grade curing agent to enable more rapid cure at lower temperatures. Two component Metallic zinc rich epoxy primer Complies with the composition and performance requirements of SSPC Paint 20

Price £614.93 (incl. VAT)
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Tikkurila Temazinc 99

Tikkurila Temazinc 99

Tikkurila Temazinc 99, a 2-component, polyamide cured zinc-rich epoxy paint providing superior cathodic protection for steel, used as a primer in epoxy, polyurethane, acrylic and chlorinated rubber systems for steel surfaces exposed to severe climatic conditions. Prequalified in the NORSOK system 1; an excellent choice for the most...

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PPG Sigmazinc 68GP

PPG Sigmazinc 68GP

Two-component, high solids polyamine adduct cured zinc rich epoxy primer. Designed as a system primer in various paint systems for aggressive environments Excellent anticorrosive properties Quick-drying, can be overcoated after a short interval Complies with the compositional requirements of ISO 12944–5 Suitable for use in offshore and...

Price £260.93 (incl. VAT)
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Zinc Rich and Cold Galvanising Paints are specialist coatings designed to protect metal surfaces, particularly steel, from corrosion. These paints contain high levels of zinc, which act as a sacrificial layer that corrodes before the metal beneath it, thereby extending the life of the structure. Cold galvanising systems, such as the Zinga cold galvanising system, offer an alternative to hot-dip galvanising by allowing the zinc-rich coating to be applied directly to the surface without the need for high temperatures.

Cold galvanising is a versatile method used across industries where metal protection is paramount. Whether applied in a factory setting or on-site in the field, these coatings provide comprehensive protection against environmental factors that cause rust and degradation. Commonly available in cold galvanising spray paint or brush-applied forms, zinc-rich paints offer a flexible and cost-effective solution for large steel structures, industrial equipment, pipelines, and marine applications.

 

Key Features and Benefits of Zinc Rich and Cold Galvanising Paints

Zinc Content

The effectiveness of a zinc-rich paint largely depends on the amount of zinc present in the coating. Most cold galvanising paints contain 90-95% zinc by weight in their dry film, which is critical for providing the cathodic protection needed to stop rust from forming. The zinc particles act as a sacrificial anode, corroding in place of the steel.

Application Methods

Zinc-rich paints are available in both spray and brush-on forms, providing flexibility in their application. Cold galvanising spray paint is ideal for small areas and touch-ups, while brush-applied versions are better suited to large, continuous surfaces. Brush application also allows for better control in detailed work, such as on intricate structures or areas with uneven surfaces.

Film Thickness and Protection

Achieving the proper dry film thickness (DFT) is essential for optimal protection. A thicker zinc coating will ensure greater resistance to corrosion over time. For cold galvanising paints, it’s crucial to adhere to the manufacturer’s guidelines for film thickness, as this directly impacts the long-term effectiveness of the paint. Thicker films are particularly beneficial for steel structures exposed to saltwater, chemicals, or extreme weather conditions.

Drying and Curing Time

The drying time of cold galvanising paints can vary depending on the formulation. Some fast-drying paints are ideal for projects requiring quick turnaround, but it’s important to ensure the coating has cured fully to provide the desired level of protection. Curing times may also be influenced by environmental conditions such as temperature and humidity, which need to be considered during application.

Compatibility with Topcoats

In many cases, cold galvanising paints are used as a primer beneath decorative or protective topcoats. Ensuring that the zinc-rich primer is compatible with the topcoat is crucial to avoid adhesion problems or a reduction in overall durability. These coatings can work in harmony with additional layers to provide both corrosion resistance and aesthetic enhancements.

Environmental Durability

Zinc-rich paints are known for their exceptional performance in environments prone to corrosion. Their ability to withstand saltwater, chemicals, and harsh weather conditions makes them the coating of choice for marine structures, coastal environments, and industrial sites. Whether exposed to high humidity or continuous chemical exposure, these paints ensure that the steel remains protected for years to come.

Longevity and Cost-Efficiency

When applied correctly, zinc-rich coatings can offer long-term corrosion protection, often exceeding 20 years in durability. This extended lifespan reduces the need for frequent maintenance or repainting, making cold galvanising paints a cost-effective solution for large-scale industrial projects. The upfront investment in quality zinc-rich coatings pays off through reduced downtime and maintenance costs over time.

Eco-Friendly Formulations

Many cold galvanising paints have been reformulated to be environmentally friendly, with low levels of volatile organic compounds (VOCs). These eco-friendly coatings are safer for workers during application and have a lower impact on the environment, particularly in industries where large quantities of paint are applied.

Heat Resistance

Some zinc-rich paints are formulated to withstand elevated temperatures, making them suitable for use on structures exposed to heat, such as pipelines, boilers, and machinery. These coatings provide continuous protection even when subjected to the high temperatures found in industrial settings.

 

Common Uses of Zinc Rich and Cold Galvanising Paints

Structural Steel in Bridges and Buildings

Steel is the backbone of many structures, including bridges, skyscrapers, and industrial buildings. Zinc-rich paints are widely used to protect these steel structures from rust, particularly in environments exposed to moisture, such as bridges over rivers or in coastal areas. The cold galvanising process ensures that even the most exposed steel remains free from corrosion for decades. For instance, the Zinga cold galvanising system has been used to protect large bridges in marine environments, ensuring their structural integrity despite continuous exposure to water and weathering.

Fencing, Railings, and Outdoor Metalwork

Cold galvanising spray paint is an excellent solution for protecting outdoor metal structures such as fences, railings, and gates. These structures are constantly exposed to rain, moisture, and varying weather conditions, all of which can cause rust. Zinc-rich coatings provide a robust barrier against these elements, ensuring that the metal remains free of corrosion for extended periods. Garden fencing, park railings, and even urban street furniture benefit from zinc-rich coatings due to their ability to resist the effects of long-term exposure to the elements.

Marine Applications on Ships, Docks, and Offshore Platforms

Marine environments are some of the most corrosive due to the high salt content in seawater and the constant exposure to moisture. Zinc-rich paints are indispensable in marine applications, where they are used to protect ships, docks, and offshore oil platforms. These paints provide exceptional resistance to the harsh conditions of saltwater corrosion, keeping vital structures like docks and pipelines operational. For example, many offshore oil platforms use cold galvanising systems like the Zinga cold galvanising system to protect critical components, ensuring their longevity and reducing the risk of costly downtime due to rust damage.

Pipelines and Industrial Infrastructure

Pipelines are vital to many industries, particularly in the oil, gas, and chemical sectors. Zinc-rich coatings are widely used to protect both underground and above-ground pipelines from corrosion. Cold galvanising systems offer an ideal solution for protecting pipelines exposed to moisture, chemicals, and fluctuating temperatures. Whether buried underground or installed in harsh industrial environments, the protective barrier formed by zinc-rich paints prevents rust and ensures the pipeline’s integrity over its operational lifespan.

Heavy Machinery and Automotive Parts

Cold galvanising paints are also used in the automotive and heavy machinery industries. Vehicle chassis, construction equipment, and agricultural machinery are often subjected to harsh outdoor conditions, which can cause rust and reduce their operational life. By applying zinc-rich coatings to key metal components, manufacturers ensure that vehicles and equipment remain functional even after years of use. In construction sites, for example, the heavy machinery exposed to rain, mud, and chemicals can be protected from corrosion through the use of zinc-rich coatings.

Industrial Tanks and Silos

Industrial tanks, silos, and other large storage containers are often constructed from steel and are prone to rust, especially when used to store chemicals, water, or food products. Cold galvanising paints are commonly used to protect these structures from corrosion, ensuring their longevity and preventing contamination. The internal and external surfaces of tanks can be coated with zinc-rich paints to prevent rust formation, thus extending the service life of these storage containers.

Power Plants and Refineries

Zinc-rich coatings are essential in protecting the structural components of power plants and refineries. The intense heat, chemical exposure, and environmental conditions present in these facilities make them highly susceptible to rust. Cold galvanising systems are applied to steel frameworks, pipelines, and storage tanks within these industries to provide long-lasting protection against corrosion. For example, power plants often rely on zinc-rich paints to coat cooling towers and other critical infrastructure to prevent rust damage.

Railway Infrastructure

The railway industry utilises zinc-rich paints to protect tracks, bridges, and overhead metal structures from corrosion. The exposure to weather elements, especially moisture and temperature fluctuations, can accelerate rust on steel components. Cold galvanising paints offer a durable solution for preventing rust and ensuring that railway infrastructure remains operational and safe over extended periods. In many cases, cold galvanising systems are used for on-site repairs and maintenance, offering an easy-to-apply solution for rust prevention.

 

FAQs

How does cold galvanising differ from hot-dip galvanising?

Cold galvanising involves applying a zinc-rich paint directly to the metal surface, while hot-dip galvanising requires the metal to be dipped in molten zinc. Cold galvanising is more versatile and can be applied on-site, whereas hot-dip galvanising requires specialised equipment and is generally done in a factory setting.

Can cold galvanising paint be used on already rusted surfaces?

While it's best to remove rust before applying zinc-rich paint, certain cold galvanising products can be applied over light rust if the surface is properly prepared. However, removing rust with sandblasting or wire brushing will ensure better adhesion and longer-lasting protection.

How long does cold galvanising paint last?

The lifespan of cold galvanising paint varies based on environmental conditions and application quality. In most cases, zinc-rich paints can provide protection for up to 20 years or more when applied correctly and maintained according to the manufacturer’s guidelines.

Is cold galvanising paint suitable for marine environments?

Yes, cold galvanising paints are highly effective in marine environments. Their ability to withstand saltwater and constant exposure to moisture makes them ideal for ships, docks, and offshore structures. Zinc-rich paints are often the first choice for protecting steel in these corrosive settings.

What types of metal can cold galvanising paint be applied to?

Cold galvanising paint is primarily designed for steel and iron surfaces. However, it can also be applied to galvanised steel and aluminium with proper surface preparation. This versatility makes it useful for touching up or repairing damaged galvanised surfaces.

How should cold galvanising paint be applied?

Cold galvanising paint can be applied by brush, roller, or spray, depending on the surface area and level of detail required. For large surfaces, spray application is often more efficient, while smaller areas and touch-ups may benefit from brush application.

Can cold galvanising paint be top-coated with other finishes?

Yes, cold galvanising paint can be top-coated with a variety of finishes, including decorative paints and protective sealants. It's important to ensure compatibility between the zinc-rich primer and the topcoat to avoid adhesion issues or reduced durability.

What is the curing time for cold galvanising paint?

The curing time for cold galvanising paint varies depending on the product and environmental conditions such as temperature and humidity. Typically, the paint dries to the touch within a few hours, but full curing may take several days for maximum protection.

Is cold galvanising paint eco-friendly?

Many modern cold galvanising paints are formulated to be low in volatile organic compounds (VOCs), making them safer for the environment and for workers applying the coatings. These eco-friendly formulations provide excellent protection without harmful emissions.

Can cold galvanising paint be used for touch-ups on galvanised steel?

Yes, cold galvanising paint is ideal for repairing and touching up areas of existing galvanised steel that have been damaged or corroded. The paint restores the zinc coating and provides continuous protection against rust and corrosion.

For further guidance on product compatibility or specific applications, contact the technical support team for expert advice.