Automotive paint from exterior to interior and everything in between
The automotive paint industry covers much more than which colour to paint your car. Every surface in a vehicle from the bodywork and under body to the exhaust and even the glass surfaces needs a specialised coating to last and perform optimally. The automotive paint market can be roughly divided into OEM automotive coatings and aftermarket and refinish coatings – basically those applied at manufacture, and those applied after. The umbrella term “automotive coatings” covers all the coating varieties within those segments.
OEM automotive paint – coated from top to toe
When stripped down to bare bones, a vehicle is a collection of various substrates from different materials, each with their own needs and demands in terms of paint and coatings. The bodywork alone receives five different coatings before it is ready for a shop. Worldwide the top OEM automotive coatings manufacturers are PPG, BASF, and Axalta. Here we will give a brief overview of the coating processes that are involved in making a vehicle.
Car paint for the body work
When the bare metal body of a vehicle hits the paint shop, it is in for an intensive 12-14 hours. Coatings are applied one after another in a series of processes carefully calculated to provide both the best coat for the substrate and the best result for the following coating. In order these steps are:
This first automotive paint or coating is a pretreatment which involves applying phosphoric acid to the substrate in order to cause a reaction which makes the substrate easier to adhere to. It also gives a degree of corrosion protection to the substrate.
The combination of the cathodic e-coat and the phosphating is the part of the coating system that gives the substrate its corrosion resistance. In this step the substrate is immersed into a paint in an aqueous suspension (dispersion), usually an epoxy-polyurethane. When an electrical current is applied the paint adheres to the substrate and forms a consistent layer of corrosion protection, even in difficult-to-reach cavities.
This coat evens out any irregularities of the electrocoat and is particularly important for stone chip resistance to protect the underlying layers and the metal from damage and resulting corrosion. Primers come in solvent-based, water-based, and powder forms, and are most commonly polyurethane-modified polyesters and epoxy resins.
- Base / under coat
The base coat and clear coat combined make up the top coat layers of car paint. The top coats give colour and durability to the coating system. The base coat gives the main colour to the vehicle, which can come in solid colour, metallic, pearlescent, matte, and other special effect paints.
- Clear lacquer
The clear coat protects the top coat and pigments from the environment, scratches, chemical attack, UV radiation. They seal the coating system and provide the first line of defence as well as the smooth, glossy final appearance. Clear coats come as one component, two component, or powder, though they are predominantly liquid. Common coating types for a clear coat are acrylics or polyurethanes.
Protective layer to the underbody
Out of sight is often out of mind, and problems can arise when the underbody is underprepared for the harsh conditions it will face. Underbody coatings protect a vehicle’s chassis from corrosion and damage caused by everything the road throws at it. They are applied over the electrocoat and must have extreme mechanical and chemical resistance. Underbody coatings:
- Protect from stone chip damage: By forming a tough, flexible, rubbery protective film, underbody coatings provide a barrier between the substrate and stone chips, gravel, road debris, sand, and other objects which may damage it.
- Protect from weather conditions and environment: The coating prevents water ingress (whether standing water or rain), as well as exposure to snow, baking heat, salt from winter anti freeze measures, and salt from coastal weather and roads.
- Extend service life: Protecting a significant section of a vehicle from damage and rust extends its life while maintaining its value.
- Improve driving comfort: Reduces sound and vibration from the road and makes the driving experience more pleasant.
An underbody car paint is applied by spray or brush, and they come in a variety of formulations. These include one and two component polyurethanes, bitumen paint, and wax coating.
Plastics and powders for the smaller parts
Wheel, front grill, drive shaft, brake parts, suspension springs, interior and exterior trim, door handles, climate control bezels, speedometer housings – the list of automotive parts that need coatings beyond the bodywork is seemingly endless. A popular option for under-the-hood car parts is extremely durable powder coating, while internal coatings are often polyurethanes. These provide a soft-feel coating for those surfaces most often touched, in one and two components and a range of colours and effects.
Higher durability for commercial vehicles
Commercial vehicles are those intended for multi-passenger or goods transport, such as vans, coaches, buses, trucks, and semis. They spend a lot of time on the road, and paint needs to be able to endure this. Durability is key, as well as corrosion, UV, and chemical resistance. Fleet owners look at the conditions their assets will be exposed to and the intended service life of the asset in order to determine which coatings they need. A range of colours and the ability to easily repair damage are also highly important for commercial vehicle coatings to reduce vehicle off road time and inconvenience.
Re-painting and repairs with aftermarket car paint
The aftermarket automotive paint industry covers custom finishes, collision repair, and commercial fleet finishes among other coatings applied to a vehicle once it has left the shop. The top 5 automotive refinish coatings vendors are Axalta, AkzoNobel, BASF, PPG, and Sherwin-Williams.
- Collision repair paints and refinishes – Accidents happen. Whether through a collision or scratches to the bodywork, paint can be damaged. Or maybe you want to give your car a spruce. Car repair paints and refinishes represent a large sector of the industry. They differ from OEM paints because their application has different requirements, including a lower heat curing and longer drying times. If you need a commercial fleet fitted out with logos or livery, you will likely use a refinisher.
- Powder paints – A key refinishing market is the powder coating market. Everything from wheels and valve covers to shock absorbers and bumpers can be powder coated. For those who want a unique and hard-working paint, powder coating is the popular choice.
- Car paint protection coatings – This is a type of paint protection coating which uses nanotechnology to protect a vehicle’s paintwork from damage from UV radiation, as well as maintaining its gloss and repelling dirt and water. It is an alternative to regular waxing and provides up to several years of protection if properly maintained.
Automotive coating manufacturers Singapore – the options and availability
Automotive coatings is a big industry, and many manufacturers and companies operate in Singapore. The top companies in the industry are AkzoNobel, Axalta, BASF, PPG, and Sherwin-Williams, operating through their automotive brands like Sikkens and Deltron. In Singapore, also Nippon Paint automotive paint coatings are common and popular. These car paint coating manufacturers form partnerships with auto manufacturers for OEM application, or provide refinish paints to applicators. Other automotive paint manufacturers operating in Singapore include the following:
|Nippon Paint Singapore||1, First Lok Yang Jurong Singapore|
|Ban Lee Seng Paints||Blk 108 Hougang Ave 1, #01-1303, Singapore 530108|
|Paintmart Pte Ltd||No 53 Tampines Industrial Avenue 5, T5 @ Tampines, Singapore 528636|
|Causeway Paints Pte Ltd||35 Gul Avenue Singapore 629675|
If you would like more information, or if you have a project for which you need automotive paint, get in touch! Our experts are here to help. Simply take advantage of our 100% free quote service and ask our team to do what we do best – connect coating needs with coating solutions. We, in cooperation with our coating partners, will strive to find the right coating for your project.
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