Coil Coating (Prepainting)

High speed coil coated products (also referred to as prepainted products) can be a significant aid in a company’s environmental, efficiency, and bottom-line cost reduction road to the future. Coil coating dates back to the 1930s and is employed worldwide today.

Kloeckner Metals, with assistance via its Coil Coated Services Group, can provide a path to improvements whether (a) fine tuning a current coil coating users incoming product or (b) managing a post paint-to-prepaint conversion project. Coil coated products can be aesthetic and functional in nature.

The industries we can serve are almost unlimited, however we currently serve the following industries with products engineered specifically to fit their respective needs: automotive – transit, appliance – large & small, agricultural equipment, building products, boats, clean rooms, cold storage structures, walk-in and reach-in coolers, elevators & escalators, food & beverage, garage door panels and opener shells, general metal cabinetry and shells, HVAC, utility trailers, and Tonneau covers.

Kloeckner is proud to offer our clients the best in coil coating equipment and capabilities. Let our experts help with all of your coil coating needs.

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Coating Process


Because coil coating is a high-speed process, we employ large coils (or rolls) of various metal types which are commonly cleaned, pretreated, and coated on both sides of the flat rolled strip. When a primer and a topcoat are both necessary to meet the end use needs, both the primer and the topcoat is applied in the same single pass through the coil coating line in most cases. This makes large to medium quantities of a single decimal thickness, width, and paint technology combination a very efficient means with which to deliver a finish coated product to the next processing point.

The coil coated product can have a finished product surface that is ready for slitting to width, embossing, cutting-to-length or other applicable fabrication. As all the steps in coil coating are performed on a flat strip the integrity of the cleanliness of the base metal surface and the adhesion of each layer is optimal and the adhesion integrity promotes all function performance including, but not limited to, corrosion resistance.

The metals that we currently have coil coated on a regular basis are aluminum, cold rolled steel, electro-galvanized steel, galvalume™, hot dipped galvanized steel, hot rolled steel, stainless steel, and tin plate.

Products That Undergo Coil Coating (Prepainting)

Special Coil Coating (Prepainting) Equipment

Branches Featuring Coil Coating (Prepainting)

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Industries Served by Coil Coating (Prepainting)


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Frequently Asked Questions

  • What is coil coating?


    Coil coating is a process that involves the continuous application of a decorative and protective layer of paint onto a metal strip (typically aluminum coil or steel). The metal strip is first cleaned and treated to improve adhesion, then passed through a series of rollers that apply primer, color coats, and clear protective layers. The result is a coil of metal with a uniform, high-quality finish that can be used in a variety of applications, including construction (e.g., roofing and siding), appliances, and consumer goods. The process offers several advantages over other methods of applying paint, including increased efficiency, improved color consistency, and reduced waste.

  • What equipment is used?


    The following equipment is typically used in the process:

    1. Uncoiler: The uncoiler holds the coil of metal and pays it out in a controlled manner to feed the coating process.
    2. Cleaning Equipment: The metal coil is cleaned to remove any oils, grease, or other contaminants. This can include chemical degreasers, pressure washers, or a combination of both.
    3. Pretreatment Equipment: The pretreatment equipment prepares the surface of the metal for coating. This can include chemical treatments such as phosphating or chromating, or physical treatments such as sandblasting.
    4. Primer Coater: The primer coater applies a thin, uniform layer of primer to the surface of the metal coil. The primer helps to improve adhesion of the topcoat and provides corrosion protection.
    5. Topcoat Coater: The topcoat coater applies the final, decorative layer of coating to the surface of the metal coil.
    6. Oven: The oven is used to cure the coating, either through heat or ultraviolet light.
    7. Cooling Equipment: The cooling equipment cools the coated metal coil to a safe handling temperature.
    8. Recoiler: The recoiler winds the coated metal coil back into a compact roll for storage or shipment.

    In addition to these core pieces of equipment, there may also be additional auxiliary equipment used in the process, such as slitting machines, edge trimming equipment, or tension leveling equipment. The specific equipment used will depend on the type of coating being applied, the desired output, and the size of the metal coils being processed.

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Additional Services

With more than 200,000 products in over 40 North American branches, Kloeckner can fulfill all your metal industry needs. Whether you need standard products or customized services, we are committed to your success. See below for a list of related services.
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Fabrication Services
Coil Coating (Prepainting)
High speed coil coated products (also referred...


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