Alexei Volkov
Wood filler is a handy tool to fix the surface of a wooden piece. It can be used to fill in nail holes or cracks. While wood filler is a great solution, it can be tricky to get the colour to match the surrounding wood. The first step is to ensure that the filler is stainable. Once you've confirmed this, clean the area thoroughly to remove dust and grease. Next, apply the wood filler with a putty knife, overfilling slightly so that you can sand it down for a smooth finish. Allow the filler to dry completely, following the manufacturer's instructions for the recommended drying time. After the filler has dried, use fine-grit sandpaper to sand the area and remove any excess filler. If you plan to stain the wood filler, it's important to note that not all fillers accept stains well. Some fillers, like DAP Plastic Wood, may not stain evenly due to their ingredients. In such cases, it's recommended to stain the wood first and then use a filler that matches the stained wood. Alternatively, you can try using a water-based filler, which tends to accept stains more readily. To achieve the desired colour, you may need to experiment with different stains or fillers and allow adequate drying time between coats to assess the final colour.
| Characteristics | Values |
|---|---|
| Plastic wood filler | DAP brand Plastic Wood is a solvent-based wood filler that is strong and easy to handle. |
| Plastic wood filler composition | Plastic Wood's main component is cellulose, but it also contains limestone and attapulgite, suspended in a substrate of acetone and isopropyl alcohol. |
| Plastic wood filler application | Apply masking tape around the edges of the hole if it is large. Stir the contents thoroughly before applying the product with a putty knife, overfilling the hole slightly so you can sand it flat. |
| Plastic wood filler drying time | The drying time is two to six hours for small holes and up to 36 hours for deeper ones. |
| Staining plastic wood filler | Plastic Wood does not stain well due to its other two ingredients, but it comes in various wood tones. It is recommended to stain the wood first and then use a filler that matches the stained wood. |
| Wood filler alternatives | Water-based fillers like Timbermate, Wunderfil, and Famowood are more porous and readily accept stains. |
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What You'll Learn
Check the wood filler can be stained
It is important to check if the wood filler can be stained before you start the process of staining it. While 99% of wood fillers are technically stainable, some are better than others. Therefore, it is important to check the packaging of your specific wood filler to see if it says it can be stained. Even if your wood filler is stainable, it may not react positively to a staining agent, and it may be impossible to match the colour of the parent wood.
To test if your wood filler can be stained, try to mix the stain with the filler in a separate cup and let it dry. You can also test the stain on the wood filler after it has dried on your wood surface. If the colour is too light, you can add another coat of stain. If it is too dark, you can try to balance it out with more stain on the rest of the wood, or you can remove the filler and try again.
It is also important to note that the colour of the wood filler does not have to be an exact match to the surrounding wood, as wood grain colours naturally vary and the stain colour will change slightly as it dries. However, if you are unsatisfied with the resulting colour, you can try mixing a latex-based filler with water, sawdust, and carpenter glue, which will be easier to stain.
Additionally, if you are filling in nail holes or cracks, it may be easier to use a filler that is closer in colour to the finish colour, rather than the wood colour. This will help to create a more seamless blend.
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Prepare the surface
To prepare the surface of plastic wood filler for staining, follow these steps:
Firstly, ensure your wood filler is completely dry before preparing to apply a stain. Refer to the instructions on the pack to find out how long you need to let it sit. For small holes, the drying time is typically around two to six hours, while deeper holes can take up to 36 hours.
Next, clean the wood surface to ensure there is no paint, grease, oil, or old stain that may interfere with the new coat of stain. Use fine-grit sandpaper or a palm sander with 220-grit sandpaper to remove any debris or light finish. If you are sanding by hand, consider using an electric sander for larger areas. If there is stubborn paint or stain that the sandpaper cannot remove, use a solvent to eliminate it. Put on a pair of rubber gloves and soak a rag in mineral spirits. Then, scrub the wood until all the old paint and stain are removed.
Once the surface is clean and sanded, allow the wood to dry properly. Finally, remove all sawdust and debris with a clean tack cloth to ensure a smooth and dust-free surface ready for staining.
It is important to note that plastic wood, such as DAP brand Plastic Wood, may not stain well due to its ingredients. While its main ingredient, cellulose, accepts stain, the other components, including limestone and attapulgite, do not. Therefore, it is recommended to stain the wood first and then use a filler that matches the stained wood color.
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Apply the wood filler
When applying wood filler, it is important to prepare the area thoroughly. Clean the area to remove all dust, and then wipe with a solvent to remove any grease or oil. If the hole is large, apply masking tape or painter's tape around the edges to protect the surrounding surfaces.
The next step is to apply the wood filler. If you are using a product from a can, stir the contents thoroughly before removing any. Use a putty knife to apply the filler, overfilling the hole slightly so that you can sand it flat later. Overfilling is not necessary for small repairs, such as nail holes or small cracks.
It is important to let the filler dry completely before moving on to the next step. The drying time will depend on the size of the hole, with small holes taking around two to six hours and deeper ones taking up to 36 hours.
Once the filler is dry, you can sand it down to create a smooth, flat surface. Use fine-grit sandpaper or a palm sander with 220-grit sandpaper to sand the area. If you are satisfied with the colour after sanding, you can move on to staining the wood.
If the colour is too light, you can add another coat of filler to darken it. If it is too dark, you can try to lighten it by adding more filler or using a solvent to remove some of the colour. You can also try balancing out the colour by staining the rest of the wood to match.
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Allow the filler to dry
When using plastic wood filler, it's important to let the filler dry completely before evaluating the colour. The solvents in the filler evaporate quickly, causing the filling material to harden. The drying time will depend on the depth of the hole you're filling. For small holes, the filler will typically dry within two to six hours. However, for deeper holes, it may take up to 36 hours.
During the drying process, it's crucial to keep the area well-ventilated to facilitate the evaporation of solvents. Avoid touching or disturbing the filler while it's drying to ensure a smooth and even finish. If you need to fill a large hole, you may find that you need to apply additional filler after the initial application has dried. This is because plastic wood filler may shrink slightly as it dries, especially if it's a water-based product.
Once the filler has dried, you can assess the colour. If it's too light, you can add another coat of filler or try to balance it out with more stain on the surrounding wood. On the other hand, if you've used too much filler and the colour is too dark, you may need to remove it and start again or try to lighten it by sanding it down. Remember that the colour of the stain will also change slightly as it dries, so allow it to cure completely before making a final judgement.
To speed up the drying process, you can use a hairdryer or a heat gun on a low setting, holding it at a safe distance from the filler to avoid overheating. Alternatively, you can place the item in a warm, dry place, such as near a radiator or in direct sunlight, to encourage evaporation. Just be cautious not to warp or damage the wood with excessive heat.
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Modify the colour
When it comes to modifying the colour of plastic wood filler, it's important to note that while the main ingredient, cellulose, accepts stain, the other ingredients, limestone and attapulgite, do not. This means that overall, plastic wood filler does not stain well. However, it comes in a variety of wood tones, so you can choose one that closely matches the colour of the wood you're filling.
To modify the colour, you can try tinting the filler before applying it. This can be done by mixing in a small amount of stain or dye to get the desired colour. It's important to test the tinted filler on a small area first to ensure that it matches the surrounding wood. If you're using a water-based filler, you can use watercolours to tint the filler, which is a cost-effective method.
Another approach is to stain the wood before applying the filler. This way, you can choose a filler colour that closely matches the stained wood. Keep in mind that the colour displayed on the filler container is only an approximation, and the actual colour may vary slightly.
If you're filling small holes or dents after staining, you can use colour putty to match the surrounding wood. Blend it with a small amount of varnish to avoid a dull finish. Alternatively, you can use wax crayons in a matching colour for tiny holes.
In some cases, you may need to modify the colour of the filler after it has dried. If the colour is too light, you can add another coat of stain. If it's too dark, you can try to balance it out by adding more stain to the surrounding wood or removing the filler and starting again.
It's worth mentioning that some types of wood filler, like Timbermate, can be mixed with various substances to create custom colours. This water-based filler comes in 14 ready-mixed colours and can be stained wet or dry.
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Frequently asked questions
The process involves cleaning the surface, sanding the area, removing old paint or stain, applying the filler, letting it dry, and then staining.
Use fine-grit sandpaper or a palm/electric sander to remove debris or old finish. If the sandpaper is ineffective, use a solvent. Wear rubber gloves and scrub the wood with a rag soaked in mineral spirits.
Check the ingredients of the wood filler. If it contains cellulose, it will accept stain. DAP Plastic Wood, for example, is a solvent-based filler that contains cellulose and can be stained.
The drying time varies depending on the size of the hole. For small holes, it can take 2-6 hours, while deeper holes may require up to 36 hours. Always refer to the manufacturer's instructions and allow ample time for drying before staining.
If the colour is too light, add another coat of stain. If it's too dark, try balancing it out by adding more stain to the surrounding wood or remove the filler and start again. You can also try modifying the colour by dabbing stain onto the filler, but the effectiveness of this method may be limited.
