
Filling nail holes in PVC trim can be done using a variety of materials, such as ordinary putty, epoxy putty, spackling compound, caulk, or a two-part epoxy PVC nail hole filler. While ordinary putty may be effective in the short or long term, epoxy putty is stronger and more durable. When using epoxy, it is important to wear gloves to avoid developing a sensitivity to the uncured epoxy and a dust mask when sanding the cured product. The two-part epoxy PVC nail hole filler is designed specifically to be used with PVC and bonds very well with the plastic. It is also extremely durable, waterproof, and dries fairly quickly. When filling nail holes, you can use your fingers or a putty knife to fill the holes with the chosen material, leaving a bit of extra material that can be sanded off later.
| Characteristics | Values |
|---|---|
| Materials to fill nail holes in PVC trim | Epoxy putty, ordinary putty, two-part epoxy, silicone caulking, joint compound, painter's putty, vinyl spackling, wood filler, caulk, crayon stick filler, acrylic-based interior/exterior spackling compound |
| Tools | Putty knife, sanding sponge, sandpaper, fingers |
| Tips | Wear gloves and a dust mask when handling epoxy, use a material that bonds with PVC, use a filler that matches the colour of the PVC trim, use a filler that can be painted over, sand off excess filler, cover the nail holes |
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What You'll Learn

Choosing the right putty
When it comes to choosing the right putty for filling nail holes in PVC trim, there are several options to consider. The most commonly suggested product is a two-part epoxy putty designed specifically for PVC. This type of epoxy bonds well with plastic, is durable, waterproof, and dries quickly. It is important to choose an epoxy that matches the colour of your PVC trim, and to be aware that not all epoxies can be painted over.
If you are unable to find a suitable epoxy putty, there are alternative options available. One option is to use a basic two-part epoxy, which should also bond well with PVC. Silicone caulking is another alternative, as it bonds with PVC and is easy to apply due to its small nozzle. However, caulking may not be suitable for painting over.
For interior PVC trim, some people recommend using joint compound, which can be applied with your finger or a putty knife and then sanded down once dry. Painter's Putty and Vinyl Spackling are also suggested as they do not require overfilling or extensive sanding.
It is important to note that some putties, such as Durhams Wood Putty and Plastic Wood brands, are not recommended for use with PVC trim. Additionally, if your PVC trim has a shiny surface, you may need to prime it before filling and painting.
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Preparing the putty
When preparing the putty to fill nail holes in PVC trim, it is important to wear gloves to avoid developing a sensitivity to epoxy. There are several types of putty and filler that can be used to fill nail holes in PVC trim. The best material to use is a two-part epoxy putty designed specifically to be used with PVC. This type of epoxy bonds well with plastic, is durable, waterproof, and dries quickly. It also does not expand or shrink, making it perfect for filling nail holes. You can also use a basic two-part epoxy, but it is important to find one that matches the colour of the PVC trim. Some epoxies cannot be painted over, so this may be a consideration.
Silicone caulking is another option for filling nail holes in PVC trim. It is easy to use due to its small nozzle, and it bonds well with PVC without expanding or shrinking. However, caulking tends to be messier and shrinks more than wood filler, and it cannot be sanded smooth. If you use caulk, make sure it is labelled as "paintable", and don't leave a smear on the wood surface.
Other options for filling nail holes in PVC trim include using a joint compound, Painter's Putty, or Vinyl Spackling. These products do not require as much sanding as joint compound, and you can use your finger to apply them instead of a putty knife. For deeper or larger holes, a putty knife may be necessary to fill a larger area and create a flat finished surface.
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Filling the nail holes
An alternative to epoxy is silicone caulking, which is easy to use thanks to its small nozzle. It should bond well with the PVC and, like epoxy, it doesn't expand or shrink. However, caulk tends to be messier and shrinks more than wood filler, and it cannot be sanded smooth. If you opt for caulk, make sure it is labelled as "paintable".
Ordinary putty may be effective in the short or long term, but epoxy is a stronger option. Painter's putty and vinyl spackling are also options, as they do not require overfilling and sanding later on. If you are filling small nail holes, you can use a little white caulk.
If you are using epoxy, start by mixing together the two parts of the PVC nail hole filler in a plastic container. Follow the manufacturer's instructions for the mixing process. Once the ideal consistency is achieved, use your fingers or a small putty knife to fill the nail holes. Leave a bit of a crown that you can sand off later. Use 100-grit or 120-grit sandpaper to sand the filler until it is flush with the PVC trim.
If you are using a water-based wood filler, you can fill the holes with your finger, leaving it protruding. The next day, after it has dried, use a sanding sponge or your finger to level it.
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Sanding the putty
When it comes to sanding the putty, it is important to wear gloves and a dust mask to avoid any allergic reactions. You should let the putty dry before sanding. It is recommended to use 100-grit or 120-grit sandpaper to sand the putty until it is flush with the PVC trim. This process will ensure that the filled nail holes are level with the PVC trim surface.
If you are using a joint compound, you can use your finger to apply a small amount of the compound to the nail hole, leaving it protruding. After it has dried, use a sanding sponge to level the surface.
For those who prefer to avoid the extra step of sanding, options like Painter's Putty and Vinyl Spackling can be used. These alternatives do not require overfilling, and you won't need to return to sand the area later.
Additionally, when working with PVC trim that has a shiny surface, priming may be necessary before sanding. This step will help to ensure a seamless finish.
It is worth noting that some fillers, such as wood putty and plastic wood brands, are not recommended for use with PVC trim. Instead, opt for fillers that are designed for PVC or those that bond well with plastic, like epoxy or vinyl spackling.
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Painting the trim
Painting PVC trim can be a straightforward process, but there are a few things to keep in mind to ensure a long-lasting finish. Firstly, it is essential to fill in any nail holes or imperfections before painting. As mentioned previously, a two-part epoxy PVC nail hole filler is ideal for this purpose, as it bonds well with PVC, is durable, and dries quickly. When filling the nail holes, ensure they are completely filled, leaving a slight crown that can be sanded down later. This can be done with 100 to 120 grit sandpaper, which will smooth out the filler and create a seamless surface for painting.
Once the nail holes are filled and sanded, it is good to consider priming the PVC trim, especially if it has a shiny surface. A primer will help the paint adhere better and create a more even finish. Choose a primer specifically designed for use on PVC surfaces, as this will ensure compatibility and a long-lasting result. Follow the manufacturer's instructions for application and drying time.
When it comes to choosing the right paint for PVC trim, opt for a high-quality paint designed for use on plastic or PVC surfaces. This will ensure that the paint adheres well and does not peel or chip over time. Consider the environment in which the trim is located; if it is outdoors or in a humid environment, select a paint with added mildew resistance to prevent the growth of mildew and mould.
Before painting, ensure the PVC trim is clean and free of any dirt, dust, or debris. This can be done by wiping it down with a damp cloth and allowing it to dry thoroughly. Then, apply the paint following the manufacturer's instructions. Typically, it is best to use a brush or roller designed for use with the paint type you have chosen. Ensure you have protected any surrounding areas that you do not want to get painted, such as windows or adjacent walls.
Depending on the desired finish and the paint type, you may need to apply multiple coats of paint. Again, refer to the manufacturer's instructions to determine the recommended number of coats and drying time between coats. Once the final coat has been applied, allow it to dry completely before handling or exposing it to any moisture.
By following these steps and choosing the right materials, you can achieve a professional and long-lasting finish when painting PVC trim. Remember to take your time, work in a well-ventilated area, and always follow safety instructions when working with paints and solvents.
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Frequently asked questions
The best material to fill nail holes in PVC trim is a two-part epoxy putty designed specifically for use with PVC. Epoxy putty is extremely durable, waterproof, and dries quickly. It also does not expand or shrink, making it perfect for filling nail holes.
First, mix the two-part epoxy putty in a plastic container, following the manufacturer's instructions. Then, use your fingers or a small putty knife to fill the nail holes with the putty. Leave a bit of a crown that you can sand off later using sandpaper.
Some alternatives to epoxy putty include ordinary putty, silicone caulking, spackling compound, joint compound, and crayon-like filler sticks. However, these alternatives may not be as durable or effective as epoxy putty.











































