Chloe Zhang
Sticking Velcro to plastic can be a challenging task due to the smooth and non-porous nature of plastic surfaces. There are several methods that can be used to achieve adhesion, each with its own advantages and considerations. One common approach is to use an adhesive such as super glue, epoxy, or a silicone-based adhesive. However, super glue tends to be brittle and can crack if the plastic bends, and it may also harden fabric surfaces. Another method is to use industrial-strength Velcro, which is designed to adhere to a wide range of surfaces, including plastic. Applying a product like Lexel, which dries clear and creates a permanent bond, can also be effective. Additionally, preparing the plastic surface with denatured alcohol or acetone can enhance adhesion. For those seeking a non-permanent solution, double-sided tape provides a strong yet pliable bond. Lastly, for thicker plastics, mechanical fasteners such as pop-rivets can be used, although this method may not be suitable for all applications.
| Characteristics | Values |
|---|---|
| Type of glue | Industrial-strength Velcro glue, Loctite 380 Black Max adhesive, cyanoacrylate (super glue), epoxy, silicone-based adhesive, UHU glue, hot glue |
| Type of tape | Super sticky double-sided tape, Tesa 4965 |
| Other methods | Pop-riveting, sewing, using fasteners |
| Surface preparation | Clean with denatured alcohol or acetone |
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What You'll Learn
Using super glue
Using superglue to stick velcro to plastic can be a tricky process. Superglue is a popular adhesive, but it has some drawbacks when it comes to attaching velcro to plastic. Firstly, it tends to harden fabric, so using it on the loop side of the velcro may result in a solid piece of fabric instead of the desired loop texture. The hook side of the velcro, made of plastic, may be more suitable for superglue application.
Additionally, superglue is brittle and prone to cracking if the plastic can bend. It also doesn't fill the gaps created by the texture of the velcro backing. As an alternative to superglue, you can consider using a plastic bonding system designed for use on all plastics, including polyethylene and polypropylene. These systems typically involve a two-part process, with an activator used to prime the surface before gluing.
If you decide to use superglue, it is recommended to clean the plastic surface with rubbing alcohol or motor spray before applying the glue. This will enhance adhesion and help the velcro stick to the plastic. You can also try scuffing the surface lightly before cleaning to further improve adhesion.
When applying the superglue, be sure to follow the instructions on the package and take the necessary safety precautions, as superglue can be hazardous if mishandled. It is also important to note that superglue dries quickly, so have everything prepared and work swiftly.
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Using epoxy
Epoxy is a good option for sticking velcro to plastic. However, it can be brittle in thin layers, so it is important to apply it in a thick enough coat to avoid this. Epoxy also fills in the gaps created by the texture of the velcro backing, which super glue does not do.
Before applying the epoxy, it is important to clean the plastic surface with denatured alcohol or acetone to ensure the velcro will stick. This can be done by simply rubbing the alcohol or acetone on the plastic surface with a cloth.
Once the epoxy is applied to both the velcro and the plastic, it is important to wait at least 24 hours before using the velcro, as it takes time to reach its maximum adhesion.
If you are using epoxy to attach velcro to a plastic car interior, be aware that it may leave a mark on the plastic. To avoid this, you can apply a patch of sign vinyl to the plastic first and then apply the epoxy and velcro on top of that.
Additionally, if you are using a two-part epoxy system, be sure to follow the instructions carefully and mix the two parts in the correct ratio to ensure proper adhesion.
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Using specialist adhesives
When it comes to using specialist adhesives to stick Velcro to plastic, there are several options available. It is important to note that superglue is not always the best option, as it can be brittle and may crack if the plastic bends. Here are some alternative adhesives that can be used:
Industrial-Strength Glue
Industrial-strength Velcro glue or super glues like Loctite 380 Black Max adhesive can be used. This type of glue is designed to bond various polymers and provides a strong, flexible hold. However, it may not work with all types of plastic, so testing is recommended.
Epoxy or Silicone-Based Adhesive
Epoxy or silicone-based adhesives are suggested for bonding plastic to plastic. These adhesives can fill gaps and provide a strong bond, but they may also be brittle in thin layers.
Cyanoacrylate (Super Glue) with Activator
A big-brand plastic bonding system uses cyanoacrylate (super glue) with an activator. This two-part system primes the surface prior to gluing, and it is claimed to work on various types of plastic.
Lexel
Lexel is a solvent-based adhesive that dries clear and can be used to stick Velcro to slippery plastics. It takes about three days to cure, and it can be peeled off if needed. However, it may leave a mark on the plastic surface.
Hot Glue
Hot glue from a hot glue gun can be used to attach Velcro to plastic. It is important to note that hot glue may not be strong enough for larger items, but it can be removed carefully without damaging the surface.
Double-Sided Tape
Super sticky double-sided tape, such as Tesa 4965, can be used as an alternative to glue. This provides a strong hold and some pliability.
When using any adhesive, it is important to clean the surfaces with rubbing alcohol or acetone to ensure maximum adhesion. Additionally, it is recommended to wait at least 24 hours after applying the adhesive before using the Velcro to allow for maximum bonding strength.
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Using double-sided tape
Before applying the tape, it is important to clean and dry the surface thoroughly. This can be done by wiping away dust and debris with a clean, dry cloth, then using mild soap and water to clean the surface. The surface should then be rinsed with clean water and dried thoroughly. For extra cleanliness, you can wipe the surface with isopropyl alcohol.
Once the surface is prepared, peel the tape from the fastener and press it firmly into place. It is important to smooth the tape to avoid air bubbles. The adhesive will reach its maximum strength after 24 hours, but some adhesives may require up to 72 hours for an optimal bond.
It is recommended to avoid using VELCRO® Brand Sticky Back Tape on fabrics, flexible vinyl, or for outdoor use as this can affect the strength of the adhesive. Additionally, the ideal room temperature for application is between 15º to 25º C (59º to 77º F) with a relative humidity of 40% to 60%. Lower humidity will result in a better bond with the surface.
If you are looking for a heavy-duty option, VELCRO® Brand offers Industrial Strength Tape, which can hold up to 10 lbs, and Extreme Outdoor Tape, which can support up to 15 lbs. These options are perfect for general indoor use and can adhere to smooth surfaces such as walls, glass, plastic, metal, and wood.
By following these steps and choosing the appropriate tape for your specific use case, you can effectively use double-sided tape to stick Velcro to plastic.
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Using rivets
First, you will need to punch both the plastic and the Velcro with a leather punch. This will create holes for the rivets to go through. If you are working with a thick and flexible plastic sheet, you can reinforce the other side with webbing, although this will be difficult to punch through. A hot punch can be used to seal the cut edges.
Next, place washers under the rivet heads and pop the rivets through the holes. Make sure to rivet both ends and the middle of the strip if it is stretched out. If the plastic is rigid, you may need to drill holes for the rivets instead.
If the Velcro becomes slack over time, you can use glue or the original self-adhesive backing to help the materials lie together, with the rivets taking the load.
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Frequently asked questions
Industrial-strength glue or super glue can be used to stick velcro to plastic. However, super glue can be brittle and may not work with all types of plastic. It is also important to note that superglue can harden fabric. Other options include epoxy, hot glue, and silicone-based adhesives.
Yes, you could use pop rivets, sewing, or double-sided tape.
Clean the plastic surface with denatured alcohol or acetone before applying the velcro.
Industrial-strength velcro with an adhesive backing is best for sticking to plastic.
