Maya Ellison
Plastic bindings are strips of plastic added to the corners of a guitar to protect the instrument from bumps and nicks. They can be glued onto the guitar body using adhesives such as acetone or CA GEL. To bend plastic guitar binding, you can use a heat gun or a hairdryer to soften the plastic, but be careful not to overheat it. The binding will start to droop when it softens, so check it often and hold it in place while it cools. You can also try pre-bending the plastic by taping it onto the guitar without gluing, or by boiling water and sticking the end of the binding into it for a few minutes before taping it to the guitar.
| Characteristics | Values |
|---|---|
| Plastic binding purpose | To add good looks and protect the guitar from bumps and nicks on the edges |
| Binding installation | Before the finish is put on the instrument |
| Binding process | Gluing, heating, and bending |
| Bending process | Using a heat gun, hair dryer, or boiling water to soften the plastic before bending and taping it in place |
| Binding type | Wood or plastic |
| Binding thickness | 0.06"-0.08" |
| Binding height | No taller than 7/32" |
| Binding glue | Weld-on-16, C.A. GEL, PVC glue, or acetone |
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What You'll Learn
Heat the plastic with a hairdryer or heat gun
Plastic bindings can be softened using a hairdryer or a heat gun. This makes the plastic more pliable and easier to bend into the desired shape. When using a hairdryer, it is important to note that the temperature may not get high enough to effectively bend the plastic. One user reported that they were unable to get the temperature higher than 120* F, and while the plastic bent slightly, it mostly returned to its former state.
A heat gun can be more effective than a hairdryer for bending plastic bindings, but it requires careful handling to avoid scorching and melting the plastic. One user reported that a $10 heat gun from Harbor Freight worked well for bending the occasional binding strip. Another user recommended the Milwaukee brand, but noted that it doesn't stay upright when set down hot. It is also important to regulate the temperature to avoid overheating and melting the plastic.
When using a heat gun, it can be directed at the plastic binding directly or used to heat a pipe that is then used to bend the plastic. One user reported using a 3" copper pipe with about 96% of the end covered, while another used a 2-speed heat gun to heat a 2" or 4" pipe with a baffle at the end. It is important to get the pipe hot enough so that spritzed water dances on the surface.
Whether using a hairdryer or a heat gun, it is important to work with the plastic slowly and carefully to avoid overheating and melting it. Test on small pieces first to get a feel for how the plastic behaves when heated, and always allow the plastic to cool and set into the desired shape before removing any tape or clamps.
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Use acetone to weld plastic together
Plastic bindings for guitars can be softened and bent using a heat gun or hairdryer. However, this method can be challenging, as the plastic may become too soft and develop twists that are difficult to straighten.
An alternative approach to joining plastic is through solvent welding, using acetone. This method involves gently moistening the edges of the plastic pieces with acetone and holding them together to form a weld. While this technique can be effective, it is important to note that acetone may only weld the outer shell of the plastic, resulting in a brittle joint. Therefore, it is recommended to test the process on a small section of the plastic first to ensure satisfactory results.
Acetone is commonly available in paint shops and hardware stores, often sold as nail polish remover or alongside nail polish removers in mega-mart beauty aisles. It is important to handle acetone with caution, as it is flammable and can be harmful if inhaled or ingested. When working with acetone, ensure adequate ventilation and follow safety guidelines.
To weld plastic successfully using acetone, it is crucial to identify the type of plastic you are working with and choose an appropriate solvent. Different plastics, such as PVC, acrylic, polycarbonate, and polystyrene, may require specific solvents or solvent mixtures for effective welding. In some cases, a combination of MEK (butanone) and acetone may yield better results than using acetone alone.
Additionally, the thickness of the plastic can impact the welding process. Thicker plastics, such as 0.08" binding, may require sanding or thinning before welding to ensure a strong and flexible joint. Experimentation and practice on similar plastic materials are recommended to refine your technique and achieve the desired results.
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Use glue to repair gaps
Plastic bindings are used to protect guitars from bumps and nicks on the edges and can be installed for decorative purposes. The process of bending plastic guitar bindings can be challenging due to the material's stiffness and requires careful application of heat and glue.
When repairing gaps in plastic guitar bindings, it is essential to address the shrinkage that caused the issue in the first place. This may involve releasing the entire length of the binding and regluing it, ensuring a secure fit. One user recommends using a small, curved wooden block that nests on the binding shelf. By heating the binding with a heat gun or hairdryer and pushing it over the curved block, you can stretch and reshape the binding before regluing.
Various types of glue can be used to repair plastic guitar bindings. Some luthier supply stores sell binding cement, which is recommended for this purpose. Duco cement is another option that has been used traditionally and is readily available. It is important to note that some glues, such as Titebond, may not form a permanent bond with certain types of plastic and are not recommended for long-term solutions.
When using glue to repair gaps in plastic guitar bindings, it is essential to test the glue on a small area first to ensure compatibility and avoid damaging the finish. Some users have suggested using super glue or medium-viscosity CA glue, but caution must be exercised as these glues can be challenging to work with and may discolour the wood. It is recommended to seal the wood with shellac before using super glue to prevent discolouration.
To repair gaps in plastic guitar bindings, it is crucial to follow safety precautions when working with tools, glues, and finishes. Wear eye protection and protective gloves, and ensure the work area is well-ventilated to avoid inhaling dust or solvent fumes. Additionally, be cautious when applying heat to plastic bindings, as they can be flammable.
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Tape the binding in place
Taping the plastic guitar binding in place is a crucial step in the installation process. It ensures that the binding adheres correctly to the body of the guitar and helps to create a seamless finish. Here are some detailed instructions on how to tape the binding in place:
Start by placing the plastic binding strip onto the guitar body, aligning it with the edge or curve where you want it to be installed. It is recommended to begin at the centre of the strip and work your way outwards, ensuring the strip follows the contours of the guitar body. Use small pieces of tape to secure the binding to the guitar body, working in sections a few inches at a time. This process is important as it helps to prevent gaps and ensures a smooth, continuous binding.
When taping the binding, it is crucial to avoid any gaps or overlaps in the tape. Ensure that the tape adheres smoothly to both the binding and the guitar body, providing a secure hold. Once the entire length of the binding is taped in place, carefully check for any gaps or misalignments. It is important to correct any issues at this stage before proceeding to the next steps of heating and gluing.
While taping, it is also essential to consider the type of tape you are using. Choose a tape that will not leave residue or damage the surface of the guitar body. Some people recommend using painter's tape or low-adhesive tape, which can be easily removed without causing damage. Additionally, ensure that the tape is wide enough to securely hold the binding but not so wide that it covers the areas that need to be glued or finished.
In some cases, you may need to heat the plastic binding before taping it in place. This is especially true for thicker or stiffer bindings that are challenging to bend. Use a hairdryer or a heat gun on a low setting, holding it 8 inches away from the plastic and moving it back and forth to avoid overheating. Be cautious when heating, as too much heat can cause the plastic to twist or deform unevenly. Always follow the manufacturer's instructions for the specific type of plastic binding you are using.
Finally, once the binding is taped in place and you are satisfied with the fit, you can proceed to the next steps of gluing and finishing. Remember to remove the tape carefully, ensuring that the binding remains securely attached to the guitar body. Taping the binding in place is a critical step that ensures the final installation is secure, aesthetically pleasing, and provides the necessary protection to your guitar.
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Pre-shape the binding by hand
Plastic bindings can be stiff and challenging to bend. One way to make them more pliable is to pre-shape them by hand before installing them on the guitar. This process involves repeatedly running the binding through your thumb and index finger to apply some "thermal bending".
To start, hold the centre of the binding strip and work your way around the body of the guitar, fitting the strip a few inches at a time. You can use tape to secure the binding in place as you go. Applying heat to the plastic will make it easier to manipulate. A hairdryer or heat gun can be used for this purpose, but be careful not to overheat the plastic. A low setting on the heat gun or a temperature of around 120* F with a hairdryer should be sufficient.
It is important to work in small sections, as the plastic will start to droop when it softens. Check frequently to ensure it does not soften too much. Once you have achieved the desired shape, allow the plastic to cool while holding it in place.
Pre-shaping the binding by hand can be a helpful technique, especially when working with thicker plastic bindings or creating intricate shapes. It allows you to achieve the desired bends and curves before gluing the binding to the guitar.
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Frequently asked questions
Plastic guitar binding can be softened using a heat gun, hairdryer, or by boiling water and sticking the end into it. Once the plastic is soft enough, bend it into the desired shape and hold it in place while it cools.
It is important not to overheat the plastic. A hairdryer is a good option as it cannot get hotter than about 120* F. When using a heat gun, keep it on a low setting.
If the plastic is too stiff, it may be because it is too thick. Sanding it down to 0.065 may make it easier to bend. Alternatively, you can try to pre-shape the binding by repeatedly running it through your thumb and index finger to achieve "thermal bending".
