Prepainted Steel Sheet Supplier

  • Excellent Heat Insulation, Sound Proofing, and Water Resistant
  • Competitive Price
  • High Mechanical Strength
  • Strong Corrosion Resistant
  • Short Delivery Time 4-7 days

Your Premier Manufacturer and Supplier of Prepainted Steel Sheet.

It is essential to get a durable base for your building, which will help in increasing its overall life. You can use Prepainted Steel Sheet by Sunnyda to provide extra support and sturdiness to your applications.

Sunnyda has earned a big name due to its quality materials. The best thing about our products is the wide range of applications they can be used for. Moreover, the affordable prices attract many buyers.

To make your buildings strong and sturdy, use our premium quality Prepainted Steel Sheet. We have a big team comprising of experienced and professional workers who make every possible effort to give you the best item. For the convenience of the user, products supplied by Sunnyda are made with anti-corrosion and anti-rusting properties.

Our Prepainted Steel Sheet is constructed in a way to bear maximum pressure without any chances of deformation. Sunnyda primarily focuses on the exceptionally high quality of the product, so that you can use that product for a longer time. Our 24 hours active customer service is happily available to support and guide you anytime, anywhere.

So, don’t waste your time, and call Sunnyda right now. Make sure that while placing your order for our long-lasting Prepainted Steel Sheet, you provide your special requirements and customization choices in the order details.

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Prepainted Steel Sheet- A Comprehensive Guide to your Strong Building.

A Prepainted Steel Sheet is a strong and durable material that is commonly used in the making of sturdy steel construction.

First, it is chemically treated, then coated, baked, cooled, and finally layered with high-quality paint.

A Prepainted Steel Sheet can be used for an extensive variety of applications in different areas.

It is optional to add single or double bakes with a combination of single or double coats while making up this Prepainted Steel Sheet.

Due to its anti-corrosive construction, you don’t have to worry about corrosion or rusting problems.

But always make sure that you give proper time to its maintenance and always keep it clean.

In this guide, we will mention some tips to keep your Prepainted Steel Sheet clean and maintained.

Moreover, we have also listed its wide range of applications and benefits. So let’s start with the details now.


1.What is a Prepainted Steel Sheet?
2.What are the Multi-Blanking Features of Prepainted Steel Sheet?
3.What are Some Prepainted Steel Sheet Slitting Features?
4.What are the Key Types of Prepainted Steel Sheet Coating Layer?
5.How is a Prepainted Steel Sheet Preferable over a Standard Steel Sheet?
6.What are the Applications of a Prepainted Steel Sheet?
7.What does Intercoat Adhesion Testing for a Prepainted Steel Sheet Include?
8.What are the Types of Paint Systems Applicable for Prepainted Steel Sheet?
9.What are the Stages of Prepainted Steel Sheet Paint Application?
10.What are the Exterior Coating Options Available in Prepainted Steel Sheet Production?
11.Which Interior Coating Options you can choose for your Prepainted Steel Sheet Coating?
12.Which Things are Included in the Prepainted Steel Sheet Custom Coatings?
13.Which Factors you Must Consider for the Best Prepainted Steel Sheet Purchase?
14.What is Stripping and how it Damages your Prepainted Steel Sheet?
15.How does Chromatic Aberration Take Place in the Prepainted Steel Sheet?
16.How is Foaming of Prepainted Steel Sheet Problematic for your Application?
17.Why do Black Spots Appear on the Surface of Prepainted Steel Sheet?
18.How to Keep your Prepainted Steel Sheet Safe from Scratches?
19.Why does the Paint Peel off After Pressing the Prepainted Steel Sheet Surface?
20.Why is Proper Inspection and Maintenance of Prepainted Steel Sheet Important?
21.Which Storage and Transportation Tips you Must Consider Regarding your Prepainted Steel Sheet?
22.What are the Processing Strategies for your Prepainted Steel Sheet?


What is a Prepainted Steel Sheet?

Prepainted Steel Sheet is a raw metal or corrosion-resistant sheet that has been painted on both sides with a consistent paint finish via a coil coating procedure.

The metal is unwound, cleaned, and chemically treated during the procedure.

Depending on the product specifications, one or both sides may next be primed and coated, oven cured, and rewound. This results in a consistent paint finish.

Prepainted Steel Sheet is made from HDG electro-galvanized, cold-rolled, and hot-dip aluzinc coated steel sheet.


What are the Multi-Blanking Features of Prepainted Steel Sheet?

Multi blanking combines the slit-to-width and cut-to-length operations into a single operation, resulting in custom slit blanks or sheets from coiled material that is rapid and cost-effective.

Its features include:

  • Reduced processing time
  • Minimal physical material handling
  • Preserving of above and below sheet surfaces
  • More efficient material flow
  • step strip cutting
  • Detailed dimensional study involvement
  • Precise blank dimensions
  • Complete material analysis


What are Some Prepainted Steel Sheet Slitting Features?

Some major Prepainted Steel Sheet slitting features are:

  • Material Thickness Range 0.03 – 20.0 mm
  • Strip Width Range 200 – 2.200 mm
  • Working Speed up to 800 m/min
  • Tensile Strength up to 2000 N/mm2
  • Coil Weight up to 45 ton

Additional Facilities 

  • Slitting tooling
  • Separator shaft robots
  • Automatic tooling
  • Cutting head changes
  • Strip thickness measuring devices
  • Strip inspection devices
  • Oiling machines

Organic coatings such as paints, vinyl dispersions, and laminates are applied to metallic coated steel after it has been washed, pre-treated, and layered.

Pretreatment coatings with phosphorus are prevalent, and pre-primed finishes can be employed in the range of organic-type coatings.


What are the Key Types of Prepainted Steel Sheet Coating Layer?

The four main types of Prepainted Steel Sheet coating Layer are:

  • Pre-Coated: They aren’t exposed to any outside factors, like air, moisture, or sunlight.
  • Primer Coated: They’re most exposed to moisture.
  • Gloss Coated: They are generally exposed to the air.
  • Satin Coated: They’re mostly exposed to both moisture and air.

It’s critical to keep this information in mind when differentiating different types of Prepainted Steel Sheet coating layers.


How is a Prepainted Steel Sheet Preferable over a Standard Steel Sheet?


Prepainted Steel Sheet is prefabricated, it has already been cut and stapled together, and so is preferable to conventional steel sheets.


Easy to Use:

It is easier to use and has additional compression points for added strength. As a result, it is far more durable than a standard steel sheet.

Thus a Prepainted Steel Sheet is recommended since it is less difficult to deal with. You can take advantage of it.


Professional :

A Prepainted Steel Sheet with a matte surface looks professional and adds a touch of elegance.


Resistant to Warping and Flaking:

It’s also extremely resistant to warping and flaking. As a result, it’s a better solution for businesses that can’t afford to have stress signs on their walls.


Long-Lasting :

A Prepainted Steel Sheet is also far more controllable and long-lasting than a Standard steel sheet. As a result, a higher-quality end product is formed.


What are the Applications of a Prepainted Steel Sheet?

Prepainted Steel Sheet has a variety of uses, including:


Metal Roofing:

Prepainted Steel Sheet is a bare metal substrate painted from both sides resulting in a homogenous paint look. This makes it a perfect raw material for building rooftops.


Fixtures for Lighting and Appliances:

It is hard and flexible at the same time which makes it a perfect choice for using it to make light fixtures on walls and ceilings. You can also use it to design the body of any appliance.


HVAC (Heating, Ventilation, and Air Conditioning):

Prepainted Steel Sheet is used in making air conditioning and ventilation systems, such as central air conditioning units or window AC units.


Doors for Garages:

Due to its strength and durabilityPrepainted Steel Sheet can be used for making garage doors and barriers.


What does Intercoat Adhesion Testing for a Prepainted Steel Sheet Include?

To assess how effectively a coating is bound to the substrate, a variety of established approaches can be used for Prepainted Steel Sheet.

Measuring procedures that are commonly employed include using a knife, tape, or a pull-off adhesion test.


Knife Test:

This basic test necessitates the use of a utility knife to scrape away at the covering.

It determines if a coating’s adherence to any substrate or some other coating layer (in the case of multi-coat systems) is typically satisfactory.

The performance is determined by the hardship faced in removing the coating applied on the substrate, and the size of the coating removed.

By the knife and cutting guide, two cuts are made into the coating at an angle of 30 – 45 degrees between legs and then down to the substrate, leading to the formation of an “X.”

The knife’s tip is used at the vertex for removing the coating from the substrate or the layer underneath.

This test demands detailed insight and appropriate practice and should be done by a professional.

A coating having a high cohesive strength may show poor adherence when compared to one that is fragile and so cracks quickly when probed.


Tape Test:

The tape test is a more formal variant of the knife test on metal substrates.

Pressure-sensitive tape is placed and removed over coating cuts.

This test has two variations: the crosshatch and the X-cut tape test.


Pull off Method:

The pull-off test is a more quantitative adhesion test in which a loading device, also known as a stub, is adhered to a coating with an adhesive.

A portable pull-off adhesion tester is used to apply increasing loads to the surface till the dolly is pulled off.

The tensile strength is the force vital to pull the dolly off (which is measured in mega Pascals or pounds per square inch (psi). It is also known as the force resisted by the dolly (MPa).

Failure will happen in the weakest plane of the system, which is made up of the substrate, adhesive, dolly, and the coating system, and will be visible through the broken surface.


What are the Types of Paint Systems Applicable for Prepainted Steel Sheet?

Topcoats are made from a variety of paints for Prepainted Steel Sheet. Most topcoats are typically compatible with all types of metallic coatings.

The key stage is to confirm that the topcoat is compatible with the primer type and that its qualities are commensurate with the end users’ demands in terms of chalk.

Resistance, color stability, flexibility, hardness, gloss, and other properties are taken into consideration.

Some paints (topcoats) are specialized paints that are only suitable for a few uses.

Others are fairly general, both in terms of their suitability for most situations and their ability to give the desired result at a reasonable cost.

Some have extremely good colorfast characteristics, which means they are less likely to fade when exposed to light.

Exposed to the sun others are extremely durable and resistant to marring. Some are gleaming and reflective.

Others provide a high-quality, consistent matte finish. Some paint coats are quite thick providing high corrosion resistance in severe conditions.


What are the Stages of Prepainted Steel Sheet Paint Application?

A thin pre-treatment layer is added to enhance paint-to-metal adhesion and prevent corrosion resistance along with a primer coating to offer further adhesion and corrosion resistance.

Topcoat paint is composed of an organic binder and different pigments to get the desired color on application.

It gives a glossy appearance, resistance against UV radiation, and prevents deterioration.


What are the Exterior Coating Options Available in Prepainted Steel Sheet Production?

Below are some of the options available for exterior coating of Prepainted Steel Sheet:

  • Anodizing
  • Galvanizing
  • Electroplating
  • Powder Coatings
  • Porcelain Enamel Coatings


Which Interior Coating Options you can choose for your Prepainted Steel Sheet Coating?

Prepainted Steel Sheet comes with a variety of options for interior coating, the range of options is listed below:

  • Polyurethane Coatings
  • Epoxy Coatings
  • Alkyd Coatings
  • Zinc-Rich Coatings
  • Acrylic Coatings


Which Things are Included in the Prepainted Steel Sheet Custom Coatings?

Creating custom Prepainted Steel Sheet metal requires much more than just cutting and twisting a sheet of metal. The following points are included in custom coatings:

Chemical Conversion Coatings


This is an important component of the galvanized and galvannealed metals’ protective covering. Zinc safeguards the metal beneath it, reducing or even eliminating corrosion.

When exposed to the elements, particularly water, zinc chemically binds with steel, sacrificing itself and protecting the core of the item.


Chromate Conversion

Chromate conversion gives zinc, aluminum, silver, tin, magnesium, or cadmium components the added benefit of electrical conductivity. The grade of the finish ranges from clear to yellow.



This process involves immersing an aluminum sheet in an acid bath containing electrolytes.

When electricity is sent through the tank, the aluminum’s surface reacts with oxygen atoms in the electrolyte to create aluminum oxide.



Passivating the surface of your item is another approach to maintain its surface integrity.


Sheet Metal Coatings for Aesthetics

Powder Coating

The goal of powder coating is to use a colored powder to cover as little or as much of an object as you like.


Silk Screening

Let’s assume you would like to put your logo or some descriptive text in your section. The method of choice is silk screening. You supply the artwork and text to be transferred.

The design file you supply is then transferred to a very thin, fine-mesh screen, upon which a big glob of ink is applied.


Forming a Final Part

Another important feature of a custom Prepainted Steel Sheet is aesthetics. A very aesthetically pleasing item or assemblage of parts may make or break a product’s look.


Which Factors you Must Consider for the Best Prepainted Steel Sheet Purchase?

Prepainted Steel Sheet has several benefits over both non-metal alternatives and other metal manufacturing techniques.

So it is necessary to have a look at these considerations when purchasing the best Prepainted Steel Sheet:

  • Affordability
  • Quality
  • High water resistance
  • Anti-corrosive
  • Good color choice


14.What is Stripping and how it Damages your Prepainted Steel Sheet?

Stripping is the process of removing paint from a previously painted surface. It is the most common type of technique involving Prepainted Steel Sheet, so understanding it is essential.

Careful Instructions Regarding Stripping

First, learn about the substance you’re working with, and then make sure you have the right stripping tools.

However, keep in mind that each local is unique and must be approached uniquely.

Effects of Stripping

  • It can sometimes result in a rough finish, which might lower the end product’s quality.
  • Wiping the paint coat that has been put to a sheet makes it cling better to a metallic surface. As a result, it may leave small scratches on the metal.
  • It requires completely removing the paint, varnish, and other coatings from the steel sheet before reassembling it. Stripping is a dangerous method that might cause damage to the steel.
  • The paint is removed in this technique so that it can be redone. The Prepainted Steel Sheet you’re selling will suffer as a result of this process.


How does Chromatic Aberration Take Place in the Prepainted Steel Sheet?

Chromatic aberration occurs as light travels through the pigments. Relative to the amount of chromatic aberration in each painting, different results are obtained.

This shows that the quantity of chromatic aberration in your paints could have a big influence on the end product.

It’s critical to ensure that the colors on a Prepainted Steel Sheet don’t clash when operating with it. The colors you use for pre-painting must be quite vibrant.

Important Considerations

  • Please ensure you’re painting something that you’ll be able to change and improve.
  • If you’re planning to manufacture a unique pattern, make sure you think about it while choosing the Prepainted Steel Sheet color.


How is Foaming of Prepainted Steel Sheet Problematic for your Application?

Foaming of Prepainted Steel Sheet is a problem when great detail is desired.

This could be due to the low quality of the raw resources, the fact that the area isn’t perfectly flat, or the greater degree of roughness on the area.


Keeping your equipment in good operating order and having enough replacement parts on hand is the best step to prevent the foaming of your Prepainted Steel Sheet.

Most foaming steel sheet treatments aren’t hazardous to goods; they’re simply applied incorrectly. So you must ensure their proper treatment.


Why do Black Spots Appear on the Surface of Prepainted Steel Sheet?

Black blotches appear along the edges of Prepainted Steel Sheet. Inadequate sanding is the most common source of black spots on the surface.

If you have a masterfully crafted piece of steel, the metal will be matte, which is a positive thing.

A piece of steel that hasn’t been polished can’t provide a pleasant light reflection.

The blotches on the surface are known as surface defects. When you use a dazzling piece of steel, you’ll get the best light reflection which will prevent the black spot’s appearance.


How to Keep your Prepainted Steel Sheet Safe from Scratches?

Some practices to consider are:

  • Make sure you’re using a highly protective coating that won’t leave any residue behind.
  • A clear coating intended specifically to protect Prepainted Steel Sheet is available, which will help it last longer.
  • There are several transparent coatings in the market that are designed to protect Prepainted Steel Sheet.
  • Apply a solvent and a degreaser before applying UV-resistant coatings.

For many people, scuffs around the margins are a big source of anxiety. This is understandable because the border of a sheet may be the most visible element of your product.

Scratches on the margins, on the other hand, could be significantly more expensive to repair than scratches on the remainder of the sheet.


Why does the Paint Peel off After Pressing the Prepainted Steel Sheet Surface?

You’re working with a thin sheet of metal when painting steel. As you compress the sheet, the exposed metal will rise and peel away.

It looks to be a frequently asked question. Because pressings have a lot of friction in this case. Because of the friction, the paint will peel away from the body of the Prepainted Steel Sheet.

You must use correctly developed paint that will stick to the lower coatings and last for an extended period.

If the paint is not implemented correctly when the sheet is placed to the steel, it may crumble off the paintbrush.


Why is Proper Inspection and Maintenance of Prepainted Steel Sheet Important?

Prepainted Steel Sheet, when properly chosen and installed, is typically designed for a long life with minimal maintenance. However, “minimal care” does not imply there is no concern!

The natural aging of paintings is a result of long-term chemical exposure alterations mostly caused by sunlight exposure.

If pollution accumulates anywhere, it is likely to have a negative impact on the environment metal that has been prepainted.

Hopefully, the majority of building components are typically exposed to rain, and pollutants are effectively eliminated by the advantageous rainwater washing action.

The primary goal of a periodic assessment should be to search for locations where rainfall is not too frequent.

When it comes to washing the prepainted surface, especially the areas shielded from a buildup of dirt and debris rain can also be especially effective at any irregularity.

Bird droppings can have a major impact in certain locations. Change the look of the roof.

In the case of locations where birds use to congregate, it is critical to do additional roof inspections often.


Which Storage and Transportation Tips you Must Consider Regarding your Prepainted Steel Sheet?

Check for evidence of damage to the box or metal upon arrival, as well as for signs of tampering. Whether there are any indications of water/condensation.

Temperature changes should be avoided. Optimal circumstances for storing: Temperature range for storage: 15-30 °C (Below 15°C, condensation may occur).

If the Prepainted Steel Sheet is left on the floor, it must be clean, and a durable mat, such as carpet, must be used. It is preferable to use felt or rubber.

Lifting belts or hooks should be used with caution while lifting coils or bundles of sheets. Make sure that the coated surface is not harmed, and the flatness of the sheet has not been changed.

When lifting coils or bundles of sheets, lifting belts or hooks should be handled with caution. Ensure that the covered surface is not damaged, and the flatness is not altered in any way.


What are the Processing Strategies for your Prepainted Steel Sheet?

You must cautiously select the substrate and surface coating type for Prepainted Steel Sheet during the tensile procedure.

To protect the coating, the metal mold surface should be very smooth while processing and a protective layer can be sprayed on the surface.

The Prepainted Steel Sheet can be used for mechanical, welded, and adhesive joints.

However, given that researchers discovered that the welding equipment and technology are still in the experimental phase of the trial and are not yet mature, it is recommended that users try the mechanical joint technique.

Zinc can be used as a sacrificial pole to preserve the surface. In general, specific treatment of the cut cross-section is not required.

Sections must be protected only if they come into touch with medicines, corrosive gases, or other hostile conditions.

Users should strive to keep the rough selvage of the cutting edge as short as possible to avoid scratching with each other during shear stacking.

The chips and metal powder created during the cutting must be removed as soon as possible; otherwise, they may harm the surface and become the source of scratch, corrosion, or rust.

The roller in touch when cutting the Prepainted Steel Sheet must be a rubber-coated roller or another material.

To avoid film coating damage, cover the surface that comes into contact with the table with a rubber cushion and maintain it clean.



A Prepainted Steel Sheet has a wide range of applications in constructing doors, windows, panels, and multiple electronic appliances.

All you have to do is to take good care of its cleanliness and maintenance to ensure its durability, safety, and efficiency.


FAQs of Prepainted Steel Sheet.

Is Prepainted Steel Sheet Better than Post-Painted Sheets?

Yes, Prepainted Steel Sheet aims to minimize the climate change that would arise if it were post-painted. It can resist high winds, extreme heat waves, and heavy rain as well.


What are the Advantages of Prepainted Steel Sheet in Terms of the Environment and Cost?

Use of Prepainted Steel Sheet can lower or eliminate the necessity of lubricants, preprocessing, paint, electricity, water, and waste disposal.

Pre-painting provides for a faster manufacturing cycle time since the metal is already coated and ready to go.


What is the Life of Prepainted Steel Sheet?

Prepainted Steel Sheet has a long life that can last up to 35 years.

The entire system is tuned for optimal performance, including the substrate, galvanizing (in the case of steel), pre-treatment, primer, and topcoat.


Is there a Limit to the Number of Colors you May Choose for your Prepainted Steel Sheet?

A wide range of color collections is present for Prepainted Steel Sheet.

The different color range was developed following extensive testing in a variety of natural and accelerated atmospheric conditions. This ensures that the performance is consistent.


What Products does Prepainted Steel Sheet Offer and How its Pricing is Done?

The products that Prepainted Steel Sheet offers are roof tiles, steel ceiling, wall panels, etc. The pricing is done according to the square per meter rule.


Can Prepainted Steel Sheet be Welded?

Yes, Prepainted Steel Sheet can easily be welded. It is necessary to employ a trained welder so that no damage is caused during the welding process.


What Products can be used to Clean Prepainted Steel Sheet?

The Prepainted Steel Sheet can be cleaned by using ammonia, bleach, vinegar, and similar products.

The chemicals which are used for cleaning must be washed properly to ensure proper washout of these chemicals.


Is Prepainted Steel Sheet more Durable than Stainless Steel?

Yes, Prepainted Steel Sheet is much durable than stainless steel. It contains a zinc and aluminum layer, whereas stainless steel sheet has some quantity of chromium.


How do you Clean Prepainted Steel Sheet Buildup?

To reduce the accumulation of paint on your Prepainted Steel Sheet, it should not be degreased or washed with strong chemicals.

Try to use the suitable chemical that is specified to use for cleaning purposes.


Why is Prepainted Steel Sheet important?

To decrease the risk of human life and property being damaged, the Prepainted Steel Sheet is important to be used.


What is Positive Rolling Direction in Case of Prepainted Steel Sheet?

The rolling in which the topcoat is being taken up results in keeping the topcoat on the outer side of the Prepainted Steel Sheet.


What is Negative Rolling of a Prepainted Steel Sheet?

Rolling the Prepainted Steel Sheet in the reverse direction resulting in keeping the topcoat on the inside is what we call negative rolling.


What are the Top Properties of the Paint Layer of a Prepainted Steel Sheet?

The paint layer of a Prepainted Steel Sheet must have nominal paint thickness, gloss, efficient adhesion, maximum scratch resistance, high service temperature, and lowest inner bending radius.


What are Some Properties of the Base Material in the Case of Prepainted Steel Sheet?

Some properties of the base material in the case of Prepainted Steel Sheet include a thick zinc layer application on the surface, between 150 to 200 MPa proof strength, and 36% elongation at the fracture.


What does Restoration of a Prepainted Steel Sheet involve?

The restoration of a Prepainted Steel Sheet involves the cleaning up of the top coating, doing appropriate touch-ups for small damages, applying a uniform paint layer throughout, and finding possible solutions to corrosion damage.

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