SMP Coating Pre-Painted Steel Sheet With 0.18mm-1.2mm Thickness And RAL Color Customization For Construction And Fabrication

1．Product Overview

Pre painted steel sheet is used where a coated metallic substrate and a finished color surface are both required in one material. This product is suitable for building panels, façade sheets, roofing components, interior cladding, appliance panels, and fabricated sheet parts where surface appearance and downstream formability need to be controlled together.

The available size range covers 0.18–1.2mm thickness, 700–1250mm width, and 1500–5800mm length. Base metal options include galvanized steel, galvalume steel, and cold rolled steel, which allows the sheet to be selected according to corrosion environment, forming route, and project specification.

2．Technical Solution

The product uses a coil coating structure built on metallic substrate plus primer and finish coating.

The top side uses 15–20 micron polyester with 5 micron primer. The back side uses 5–7 micron, or 7–8 micron polyester with 5 micron primer. This coating build is relevant in actual use because surface finish stability depends not only on color selection but also on substrate type, primer layer, top coat thickness, and handling during fabrication.

Coating systems include PE, SMP, HDP, and PVDF. In practical selection, the coating should be matched to the service environment, required appearance retention, and fabrication route. With or without top-side protective film can also be selected according to transport, storage, and installation requirements.

3．Specifications

4．Application

• This material is suitable for roofing sheets, wall cladding, façade panels, and general construction sheet fabrication.
• It can also be used for appliance panels, interior decorative panels, and fabricated metal components where surface finish and sheet formability need to be considered together.
• For projects using galvanized or galvalume base metal, it is suitable for exterior building envelope parts where both coated substrate and painted surface are required.

5．Processing

• The sheet can be supplied in cut length for direct fabrication.
• It is suitable for cutting, bending, roll forming, profiling, and general sheet metal processing.
• When the final part has visible surface requirements, protective film on the top side should be considered before transport and installation.
• Base metal and coating type should be selected together according to forming severity, outdoor exposure, and project specification.

6．Advantages

• The 0.18–1.2mm thickness range is suitable for light to medium sheet fabrication.
• The 700–1250mm width range matches common panel and cladding processing routes.
• Multiple base metal options allow selection by corrosion environment and downstream fabrication requirement.
• Multiple coating systems allow the sheet to be matched to different service environments and finish requirements.
• RAL color customization supports project-based appearance matching.

7．How to Choose

• Choose galvanized steel base when the project requires a zinc-coated substrate for general painted sheet use.
• Choose galvalume steel base when the project specification requires aluminum-zinc coated substrate.
• Choose cold rolled steel base when the painted surface is required on non-coated substrate for controlled indoor or protected-use applications.
• Choose PE for standard applications, SMP for exterior building sheet applications, and HDP or PVDF when the project has stricter weathering and finish-retention requirements.
• Choose thickness according to panel rigidity, forming route, and installation span.

8．FAQ

Q1．What is the thickness range of this pre painted steel sheet
The thickness range is 0.18–1.2mm.

Q2．What width range is available
The width range is 700–1250mm.

Q3．What base metals are available
Available base metals are galvanized steel, galvalume steel, and cold rolled steel.

Q4．What coating systems are available
Available coating systems are PE, SMP, HDP, and PVDF.

Q5．Can the color be customized
Yes. The color can be supplied according to the RAL card or according to the client’s request.