
Painting an outdoor plastic shed can be a great way to enhance its appearance and provide added protection. It is important to use the right type of paint and techniques to ensure the paint adheres properly. Before painting, the surface of the shed should be thoroughly cleaned and dried. There are several types of paint suitable for plastic sheds, including acrylic or latex-based paint, and specialised paints for exterior use that offer protection against UV rays, moisture, and mildew. Spray paints designed for plastic surfaces are also an option but may be more expensive.
| Characteristics | Values |
|---|---|
| Paint Type | Acrylic latex paints, oil-based paints, exterior paint |
| Paint Brands | Sherwin Williams, Valspar, Rustoleum, Krylone, Keter |
| Paint Finish | Satin, semi-gloss, flat |
| Paint Application | Brush, roller, spray |
| Surface Preparation | Clean, dry, pressure wash, treat mould, repair damage, prime |
| Paint Maintenance | Reapply every few years |
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What You'll Learn

Preparation: Clean and dry the surface
Before painting your plastic outdoor shed, it is important to clean and dry the surface thoroughly. This will ensure that the paint adheres properly and will create a smooth canvas for the paint to stick to.
First, remove all items from inside the shed. Clean the top and bottom of all shelves, if applicable, and open and clean all cabinets, including the doors. Next, sweep the ceiling, walls, and floor with a standard broom to remove dust, leaves, mud, and other debris.
Then, mix a few drops of liquid soap with water in a spray bottle. Spray this solution onto the walls and ceiling of the shed, and scrub any stubborn dirt with a brush or sponge. Alternatively, you can use a pressure washer for more stubborn stains and accumulated dirt. Hand-scrub any caked-on dirt with a scrub brush. Rinse the shed thoroughly with plain water, either by spraying it down with a garden hose or using a spray bottle.
Open all doors and windows to allow the shed to air dry completely. Make sure to inspect the shed for any signs of mold, mildew, cracks, holes, or discolouration, as these can affect the paint's adhesion and compromise the structure over time. Treat any affected areas with the appropriate cleaner and allow them to dry before proceeding.
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Primer: Use a hardcore primer like Kilz
When it comes to painting an outdoor plastic shed, preparation is key. Before you even consider priming and painting, you need to ensure the surface is clean and free of dirt, grime, and old paint. Power washing is a good way to ensure the surface is ready for painting. Once the shed is clean, you can begin the priming process.
The KILZ ADHESION Primer is another option that is specifically formulated to bond to tough-to-paint surfaces. It can be used on a variety of surfaces, including PVC, vinyl, and glossy finishes. This primer can reduce or eliminate the need for sanding and provides a sound anchor for the topcoats of paint. Again, it is important to ensure the surface is clean and dry before application.
Once you have chosen the appropriate KILZ primer for your needs, follow the application instructions carefully. Typically, primers can be applied using a brush, roller, or sprayer. Allow the primer to dry thoroughly before moving on to the next step, which is sanding.
After priming, a light sanding will help clean up any edges and drips from the primer application. This step ensures a smooth and uniform surface for the topcoat of paint. It is important to note that if you are using a water-based paint, you should opt for a light sanding, while an oil-based paint may require a more heavy-duty sanding job.
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Paint type: Acrylic latex-based paint
When choosing paint for your outdoor plastic shed, one option to consider is acrylic latex-based paint. This type of paint is known for its durability and flexibility, making it a popular choice for exterior surfaces. Here are some key points to consider when using acrylic latex paint for your outdoor shed:
Durability and Protection
Acrylic latex paints, such as PPG Permanizer Exterior Acrylic Latex, offer superior durability and protection against the elements. They provide resistance to cracking, flaking, and peeling, ensuring that your shed maintains its aesthetic appeal over time. This type of paint also offers advanced UV protection, shielding the shed from sun damage and fading. Additionally, it guards against moisture, mildew, and dirt, further enhancing its longevity and maintaining its fresh appearance.
Surface Preparation
Before applying acrylic latex paint, it is crucial to prepare the surface of your shed thoroughly. Start by cleaning the exterior to remove any dirt, grime, or old paint. You can use a mild detergent and water solution, or for more efficient and faster results, consider pressure washing. Pay attention to any signs of mold or mildew and treat them with an appropriate cleaner. Allow ample time for the surface to dry before proceeding to the next steps.
Application Techniques
Acrylic latex paint can be applied using different techniques, depending on your preference and the size of your shed. You can use a brush roller, a spray gun, or even spray it on. If you opt for rollers, having a brush on hand to smooth out the edges is recommended. For the best results, apply at least two coats of paint, especially if you're using a light shade or covering a darker color.
Finish Options
When it comes to the finish, satin and semi-gloss options are recommended for exterior paint jobs. These finishes provide a balance between aesthetics and functionality. They offer a level of sheen that is easy to clean and also creates a protective barrier, enhancing the durability of your shed.
Remember, when painting your outdoor plastic shed with acrylic latex paint, always follow the manufacturer's instructions and safety guidelines for the best results.
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Paint brand: Sherwin Williams Duration
When it comes to painting an outdoor plastic shed, preparation is key. Ensure the surface is clean and free of dirt, grime, and old paint, which can affect the adhesion of the new paint and lead to peeling. Consider using a mild detergent and water solution, and for stubborn stains, try pressure washing. It's also important to treat any mould or mildew before painting. Allow ample time for the surface to dry.
Once the surface is prepared, you can consider the type of paint to use. Sherwin Williams Duration is a popular choice for exterior paint. It is an acrylic latex paint, known for its durability and flexibility, providing resistance to cracking and fading. It also offers excellent moisture resistance and fast-drying times.
Sherwin Williams Duration exterior paint is available in a range of finishes, including satin and semi-gloss. These finishes not only enhance the aesthetic appeal but also provide a protective barrier against the elements. The satin finish, in particular, provides a level of sheen that is easy to clean and maintains a pristine appearance.
To apply the paint, use a roller with a width of 3/4" or 1", and you may need a ladder to reach the higher areas of the shed. While Sherwin Williams Duration may be more expensive than other options, its performance and durability make it a worthwhile investment for a professional-looking finish on your outdoor plastic shed.
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Finish: Satin, semi-gloss or flat
When it comes to painting an outdoor plastic shed, it's important to consider the finish you want to achieve. Satin, semi-gloss, and flat finishes are all popular options, each offering its own unique advantages and appeal.
Satin and semi-gloss finishes are known for their subtle sheen, which not only enhances the aesthetic appeal of your shed but also provides functional benefits. These finishes offer a protective barrier against the elements, making it easier to clean and maintain. They are also known to be more durable and long-lasting, withstanding the rigors of changing weather conditions. Satin finishes, in particular, can provide a sophisticated and elegant look to your shed, making it stand out in your outdoor space.
On the other hand, a flat finish, also known as a matte finish, offers a more understated and contemporary look. While it may not have the same sheen as satin or semi-gloss, a flat finish can provide a sleek and modern appearance to your shed. One of the advantages of a flat finish is that it tends to hide imperfections and blemishes better than glossier finishes, making it a good choice if you're looking for a more uniform and consistent look.
When choosing between satin, semi-gloss, or flat, it's important to consider the overall style and architecture of your shed, as well as your personal preference. If you're looking for a balance between aesthetics and functionality, satin or semi-gloss could be ideal. However, if you prefer a more subtle and contemporary look, a flat finish might be the perfect choice.
Additionally, it's worth noting that proper surface preparation is key to achieving a successful paint finish. Ensure that your shed is thoroughly cleaned and prepared before painting. Remove any dirt, grime, or old paint, and consider pressure washing for a pristine canvas. By taking the time to prepare the surface, you'll not only improve the adhesion of the paint but also ensure a smooth and long-lasting finish.
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Frequently asked questions
You should use paint that is designed for plastic surfaces. Acrylic or latex-based paint works well on plastic and provides excellent protection against the elements. You can also use spray paint, but it may be more expensive.
Before painting, ensure that the shed is clean and dry. Remove any dirt or grime using soap and water, then let it air dry completely. Examine your shed for any cracks or holes and address them to prevent water damage.
Satin and semi-gloss finishes are preferable as they offer a level of sheen that is easy to clean and provides a protective barrier against the elements.









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