10 best adhesives for plastic [ 2020 ]

Glue for plastic buying guides

Choosing the right type of adhesive that meets the requirements of your plastic will ensure that the best connection is achieved and that using the superglue will not damage your plastic.

Choosing the best glue

When choosing the best glue for plastic items, first check the bottom or side of the container for the recycling symbol on your plastic item. Different types of plastics require different types of glue to achieve the best bond and to ensure that damage to the plastic is avoided. The recycling symbol is represented by three arrows that form a triangle, while within the triangle there is a combination of letters and numbers.

If the recycling symbol shows either PS or 6, the plastic is polystyrene and a poly cement is the best type of glue, or you can use a cyanoacrylate glue or an epoxy. However, if the recycling symbol contains a 2, 4, or 5, or PP, HDPE, UMHW, or LDPE, you need to find a specific adhesive for your plastic, as such plastic materials may be difficult to glue. To find the best adhesive for these plastics, make sure that the label on the adhesive specifically refers to your recycling symbol. If your recycling symbol has a 7 or a 9, your plastic may be made of plastic, and epoxy or cyanoacrylate glue may be your best option.


Before gluing plastic, make sure that the plastic object is cleaned effectively and that there is no grease or dirt on the plastic. To ensure that your plastic is cleaned well, wash your item with warm soapy water and dry it thoroughly. Try not to touch the plastic with your fingertips to avoid transferring natural oils back to the plastic. Then you should sand the surface of the plastic with sandpaper with a grain size of up to 200 so that the plastic edge loses its smoothness.

Some adhesives, although not general adhesives, must be mixed to form the appropriate substance that will achieve a good bond. Therefore mix your glue separately on a disposable wooden surface. Next, take a small brush and apply a light but even layer of the glue to both surfaces you want to glue. Press the two surfaces together and press them firmly to ensure that all air bubbles are removed. If glue comes out of the plastic compound, wipe it off quickly. For adhesive that takes a significant amount of time to fully glue, use a clip or masking tape to hold the parts together while the adhesive is working.

Maintain glue

After applying the glue, make sure that you put the cap back on firmly and that there is no excess at the edges. Your glue tube should last up to a month after opening, but this depends on the type of glue and the glue brand. Once your glue has been opened, the surrounding moisture will soon enter the container and the glue will begin the polymerization process.

Other uses for glue

In addition to gluing plastics and other materials together, there are many other uses for glue. For example, if there is a hole or crack in a wood, try filling the gap with glue and sawdust. Also try using super glue to reveal your fingerprints and pull back dry copies of your own fingerprints. However, don’t do this if you have sensitive skin and only use a mild, general super glue.

Expert tip

If you get instant glue on your hands, you may be able to peel the dried glue off your skin. However, if this is not possible, try making a mixture of warm water and soap and let your hands soak in the mixture for up to a minute to make the glue softer and easier to peel off. Alternatively, you can try this mixture with a detergent to get a stronger soap. If that doesn’t work, try putting your skin in mineral spirits, a method that’s perfect for sensitive skin, or acetone if your skin is normal.

Other home remedies are to use butter or margarine to loosen the glue stain and the surrounding area, or you can use olive oil. Alternatively, you can make a mixture of salt and some water to get a paste that should then be rubbed into the skin until the glue stain comes off the skin.

Did you know?

Superglue was accidentally discovered in 1942. Dr. Harry Coover wanted to make clear plastic visors to complement the Allied forces’ war efforts in World War II. He stumbled across the cyanoacrylate substance, although he was released because it was unsuitable for the job.

A few years later, Dr. However, Coover again on cyanoacrylate to make an acrylate polymer that was heat resistant to jet canopies. The benefits of this super sticky substance were soon recognized and in 1958 superglue was launched in its earliest form under the name “Eastman # 910”.

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