
Painting a plastic shed is a great way to give it a makeover and enhance its appearance. It can also provide added protection from the elements, such as rain and snow, and help to extend the shed's lifespan. When painting a plastic shed, it is important to use the right type of paint and techniques to ensure the paint adheres properly. This includes using a primer and choosing a paint that is designed for plastic surfaces, such as acrylic or latex-based paint. The process of painting a plastic shed involves making any necessary repairs, thoroughly cleaning the surface, and applying primer and paint.
Characteristics and Values Table for Painting a Plastic Shed
| Characteristics | Values |
|---|---|
| Paint Type | Water-based acrylic paint, self-priming exterior paint, spray paint, or paint specifically designed for plastic |
| Paint Brands | Rustoleum, Valspar, Krylon, Benjamin Moore Aura, STIX, and Regal |
| Tools | Paintbrushes, rollers, roller trays, paint sprayer, extension ladder, gloves, safety goggles, tarp or plastic sheeting, cardboard boxes, pressure washer, soap and water, sandpaper, primer, and sealant |
| Preparation | Ensure the shed is clean and dry, protect surrounding plants, research paint colors and techniques, estimate square footage to determine paint quantity, and check the weather forecast |
| Safety | Wear gloves and safety goggles, work in a well-ventilated area, and have someone nearby for assistance |
| Maintenance | Repeat the process every few years to maintain protection |
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What You'll Learn

Choosing the right paint
There are several options available for painting plastic sheds, including spray paints and traditional brush or roller applications. If you opt for spray paint, look for products specifically designed for plastic, such as Rustoleum or Krylon, which are available in various colours. Spray-on coatings are more costly, but they offer excellent protection and a long-lasting finish. Traditional brush or roller applications can also be effective if you choose the right type of paint. Acrylic or latex-based paints are suitable for plastic and provide a waterproof barrier that protects against rain and snow. Water-based acrylic paint is another option recommended by some manufacturers for Keter outdoor sheds.
When selecting a paint colour, consider your local weather conditions and the level of protection you need. You may also want to match your shed colour to your house for a polished look. It is essential to estimate the square footage of your shed to determine the amount of paint you will need. If you plan to use a paint sprayer, keep in mind that you may need to purchase more paint than you would for a traditional application method.
In addition to paint, priming your plastic shed is crucial to ensure proper adhesion and enhance the protection of your shed. Choose a primer that adheres well to plastic, such as the Zinser 123 primer or the STIX® Waterborne Bonding Primer for vinyl sheds. Allow the primer to dry completely before applying the paint. For wooden sheds, it is essential to paint with the grain and not against it.
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Preparing the work area
Clear and Prep the Area Around the Shed:
Start by clearing any items or obstacles from the area surrounding your shed. This will give you a safe and spacious work area. If there are any plants or shrubs growing near the shed, protect them from paint splatters and foot traffic. You can use large cardboard boxes placed upside down or as tents to cover them.
Clean the Shed Surface:
Before painting, ensure the shed surface is clean and dry. Remove any dirt, grime, or mildew using soap and water. You can use diluted liquid dish soap and a sponge or cloth to gently scrub the surface. Alternatively, a pressure washer can be used for a faster and more efficient clean. Make sure to rinse the surface thoroughly and let it air dry completely.
Choose the Right Paint and Primer:
Select a paint designed specifically for plastic surfaces, such as acrylic or latex-based paint. You can opt for a self-priming paint or choose a separate primer and paint. If you go with a separate primer, choose one that adheres well to plastic, such as an acrylic primer or a specialised primer like Zinsser 123.
Gather Your Tools and Safety Equipment:
Set up a workstation with all the necessary tools and materials. This can include items such as paintbrushes, rollers, trays, tarps or drop cloths, gloves, paper towels, and a drink to stay hydrated. It is also important to wear safety goggles and work in a well-ventilated area to minimise exposure to paint fumes.
Check the Weather Forecast:
Check the weather conditions before starting to paint. Avoid painting in wet weather, extreme temperatures, or high humidity. The optimal temperature for exterior painting is between 50°F and 100°F (10°C and 38°C) in low humidity. Ensure you have a few days of favourable weather to allow the paint to dry completely.
By following these steps, you will have a clean and prepared work area, ready to begin painting your plastic shed.
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Cleaning the shed
Before you begin painting your plastic shed, it is important to clean and prepare the surface. This will ensure that the paint adheres properly and that your shed has a polished look once the paint job is complete.
First, protect any plants or foliage growing near your shed from paint splatters and foot traffic. Large cardboard boxes placed upside down or in a tent-like structure over the plants can provide adequate protection.
Next, gather your cleaning supplies. You will need soap or a mild detergent, water, and a way to rinse the shed off. A pressure washer will make this step faster, but a hose or bucket of water and a sponge will also do the trick. If your shed is particularly dirty, you may want to use a scrub brush or a roller with a long handle to help you reach the top of the shed. If you use a pressure washer, be sure to wear protective gear, including gloves and safety goggles, and work in a well-ventilated area to avoid exposure to fumes.
Once you have your supplies, mix a mild detergent or liquid dish soap with water and use it to scrub the surface of your shed. Be sure to remove all dirt, mildew, and grime. If you are using a pressure washer, you can use the soapy water to scrub the shed and then use the pressure washer to rinse it off. If not, use a hose or bucket of clean water and a sponge to rinse the shed thoroughly. Allow the shed to air dry completely before moving on to the next step.
Finally, inspect the shed for any necessary repairs, such as rotten boards that need to be replaced or loose nails that need to be hammered back into place. Take the time to address any issues you find to ensure that your shed is in good condition before you begin painting.
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$46.99

Applying primer
When applying primer to a plastic shed, it is important to use a primer that adheres well to plastic. For example, Zinsser 123 is a primer that can be used before applying exterior paint. You can also use an acrylic primer. Valspar also makes a primer for plastic.
Before applying primer, ensure that the surface of the shed is clean and dry. Remove any dirt or grime using soap and water, and then let it air dry completely. Alternatively, you can use a pressure washer to clean the shed.
Once the shed is clean and dry, you can begin applying the primer. Use a paintbrush to cut in the edges of the shed. Then, switch to a roller and apply an even coat of primer to the rest of the shed. Make sure to follow the manufacturer's instructions and allow the primer to dry completely before applying paint.
It is important to take safety precautions when applying primer. Wear gloves and safety goggles, and work in a well-ventilated area to minimize exposure to fumes. It is also a good idea to have someone around to help in case you need assistance or have an accident.
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Painting the shed
Painting a shed is a tedious but straightforward task. Firstly, you need to decide on the colour and type of paint. If your shed is plastic, you should use a paint designed for plastic surfaces, such as acrylic or latex-based paint. You can also use a primer before painting. For vinyl siding, a self-priming exterior paint can be used.
Before painting, ensure the shed is clean and dry. Use soap and water to clean the surface, and then let it air dry completely. If there is mildew, use a diluted liquid dish soap and water and then rinse thoroughly. You could also use a pressure washer. If your shed is made of wood, you should also sand it down with medium-grit sandpaper before painting.
Once the shed is clean and dry, it's time to start painting. Use a paintbrush to cut in the edges of the shed, then switch to a roller to apply an even coat of paint to the rest of the shed. If you are using a primer, you will need to do the same process with the primer first and let it dry completely before painting.
When painting, make sure you are taking the necessary safety precautions. Work in a well-ventilated area to minimise exposure to fumes, and always wear gloves and safety goggles. If you are using a ladder, make sure someone is around to help in case of any accidents.
Let the paint dry completely before considering a second coat. The drying time will depend on the product and weather conditions, but it may take several hours or even days.
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Frequently asked questions
You should use a paint that is designed for plastic surfaces, such as acrylic or latex-based paint. Benjamin Moore recommends STIX® Waterborne Bonding Primer and Regal® Select Exterior Paint for vinyl or PVC sheds. You can also use a water-based acrylic paint for exterior use.
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. You can also use a pressure washer.
Wear gloves and safety goggles. Work in a well-ventilated area to minimise exposure to fumes. Make sure someone is around to help and watch out for you, especially if you are using a ladder.






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