How to navigate the choices when you buy powder coating powder
Powder coating is the coating for everyone – from mag wheels to the perfect garden gate, domestic items to heavy-duty industrial protection. It is a high performance coating method that is used to protect substrates from corrosion, chemicals, weather, and physical damage while providing an attractive drip-and-sag-free finish. Powder coating is also a cost effective coating option as it produces little to no waste; Powder overspray can be collected and recycled, which is partly the reason behind its environment-friendly cred. All these qualities make powder coating attractive, and there are many companies in New Zealand from which you can buy powder coating powder.
In this article we look at powder coating powders and give you the information you need to buy the right one. We also look at where to buy powder coating powder and the brands and companies that sell them in NZ.
Colours, effects and prices – the powder coat round-up
Powder coating powders are sold in a mind-boggling range of colours. Most powder companies will produce a range of “standard” colours, with the option to choose another RAL colour that they can produce for you. These options will be represented in their powder coat colour chart or their sample cards. Powder coat colours can also be tailor-made for your specific needs, though not all companies provide this service. The colour options will start with the basic solid colour standard, and then get more exciting (and more expensive) from there.
Powder coating comes in a range of special effect finishes, some of which are not available in liquid paint. These special attributes include:
- Gloss levels – A powder coating finish comes in levels of gloss from flat/matte with no shine to full gloss , which is the shiniest. Between these are satin and medium gloss.
- Colour effects – These include translucents, which add colour while also allowing the metal substrate to gleam through, and dormants – A bright candy finish, this is a two step effect with a typically metallic base coat and a clear top coat. These are particularly used on bikes.
- Metallics – A metallic sheen or sparkle effect caused by the inclusion of metallic pigments like aluminum flake or mica, ranging from shimmer to glitter. They come in bonded and unbonded (which describes how the metal is incorporated). Unbonded is the cheaper but less consistent finish.
- Textures – These include sand (sandpaper appearance), hammer (like a hammered metal surface), wrinkle (commonly seen on items like gym machines – rough yet smooth, with depth), and river vein (an almost wet look finish with a dimpled and crinkled effect).
$20 per 500g is the average powder coating powder price, but of course this changes with brand and specialisations. Due to the American domination of the powder coating market (particular for products for the DIY market), many powder are still sold in quantities by the pound (~450g). As an example, in America AkzoNobel’s Interpon 100 epoxy powder in basic white retails at $950NZD per 55lb (25kg) box, breaking down to $17.30 per pound. When you look to buy powder coating powder you quickly realise the more extreme the effect or outrageous the colour or texture, the more expensive it is.
Metallics in general are more expensive due to the extra processes involved in making them, the special textures require extra thick film build or specialty application techniques which also increase the price. The more specialised the powder, the higher the price. The cost of powders decreases per unit as the volume increases – you will pay less per pound, for example, if you buy a higher quantity. Our powder coating prices page provides a look at how costs are calculated in the final powder coat product.
Choosing the right powder coating resin for your project
Before you decide on a colour you need to make sure you are choosing the right chemistry for your application. Like liquid paint, powder coating powder is available in a range of resin types from acrylic to polyurethane. Another important factor to understand is the curing process of the powder. In this respect powders can be divided into two broad categories: thermoset and thermoplastic. In a thermoset resin, the molecules form crosslinks as they cure. This permanently alters the chemical composition of the coating. Thermoplastic resins have longer chain molecules to begin with and do not form crosslinks. Consequently, they can be re-melted if exposed to high enough temperatures.
They are both applied through the usual powder coating methods, but thermoplastic powders are more flexible, where thermoset powders are heat stable. Most powder coating powders are thermoset powders. Below is a list of the main resin types and their applications. It is important to choose coating products based on the substrate, environment, and use that it is required for.
|Powder Coating Powder Type||Description||Uses||Product example|
|ACRYLIC POWDER||A thermosetting resin with good chemical resistance.||Mainly used in the automotive industry for smooth, chip resistant clear coats.||PPG Enviracryl|
|EPOXY POWDER||A thermosetting, impact resistant, durable, corrosion resistant, chemical resistant, and highly adhesive powder. Not UV stable.||Mostly used in as a protective coating in interior applications and factory equipment. Fusion bonded epoxy powder coating is used to protect pipelines from corrosion.||Insoltech Valveguard Pipe and Steel FBE|
|POLYESTER POWDER||The most common thermosetting resin type due to its flexibility, durability, mechanical resistance, chemical resistance, versatility and low cost. TGIC and TGIC-free formulations.||Used for exterior applications. There are also Super Durable Polyesters which offer extended colour and gloss lifespans.||Dulux Duratec line|
|HYBRID EPOXY-POLYESTER POWDER||Toughness, chemical resistant, colour stable and highly decorative. It has better weatherability than pure epoxy, but decreased chemical and corrosion resistance.||Commonly used for office furniture, consumer products, retail/shopfitting and interior applications.||PPG Envirocron Hybrid|
|FLUOROPOLYMER POWDER||Thermoset fluoropolymer powder coating which has excellent weatherability, UV stability, and colour and gloss retention.||Typically used in exterior industrial and architectural applications (like PVDF coating) as they are the longest-lasting, best-performing outdoor powder coating option.||AkzoNobel Interpon Fluoromax|
|NYLON POWDER||Thermoplastic powder used where friction reduction, resistance to corrosion and chemicals, and a cosmetic finish are required.||Kids playground equipment, shopping carts and wire shelving use nylon coating, as well as applications in the healthcare industry.||AkzoNobel Interpon TP RTS|
|POLYURETHANE POWDER||A thermosetting powder with excellent corrosion resistance, UV stability, and durability, but more expensive than alternatives.||Used for exterior applications with a need for hardness and a lower film build, furniture, garage doors, lighting, etc.||Dulux Armouspray line|
|SILICONE POWDER||A heat resistant powder coating for temperatures up to 1000°F.||For high heat applications such as engines and exhaust systems, stoves, ovens, lighting and others.||AkzoNobel Interpon HT 450 RTS|
Where to buy powder coating powder NZ: brands and companies
If you are looking to buy powder coating powder for your business, or have a business that requires powder coating powders for specialty applications, there are several big companies operating in New Zealand who provide powders for your needs. These companies include AkzoNobel, Dulux, PPG, and Insoltech. Below is a table outlining a few of the products available on the New Zealand market.
For the at-home hobbyist with wheels or garden furniture to coat, there are many online portals that sell powder in smaller quantities. The bigger companies like AkzoNobel are unlikely to provide a single pound of powder for a small application, and a pound will get you very far. Companies like The Powder Coat Store or Prismatic Powders sell a range of powder colours, effects, and chemistries by the pound for these types of applications – but beware they will come with the added cost of international shipping.
|Powder Coating Powder Company||Company Headquarters||Powder Coating Powder Brand|
|AkzoNobel Interpon Powder Coatings||686 Rosebank Road, Avondale Auckland 1026||Interpon and Resicoat|
|Dulux Powder and Industrial Coatings||31B Hillside Rd, Glenfield, Auckland 0627||Fluoroset, Duratec, Armouspray and more|
|Insoltech||531 South Titirangi Rd, Titirangi, Auckland 0604||Valveguard, Xterior Plus|
|PPG Industrial Coatings||5 Monahan Rd, Mount Wellington, Auckland 1060||Envirocron, Enviracryl, Duranar, Coraflon and Silversan|
If you are looking to buy powder coating powder, we are here to help! We will connect you with one of our coating partners to provide you with the best coating for your project. The quotation service is free, and our experts will help you determine the right coating. Simply use the “Request a Quote” button beneath this article and fill out the contact form so we can get started.