can I epoxy plastic cups?

Can you epoxy plastic cups? How do you make epoxy stick to plastic? Can epoxy melt plastic? These are all questions we’ve been asked about our cup and tumbler coatings.

So, in this blog post, we’re going to answer these questions and more, including what kind of cups we can use with our products (and some tips on how to prepare them), as well as which types of epoxies, work best for coating plastic items.

Can you epoxy over plastic cups?

Epoxy can be used to create a permanent bond between plastic cups. Epoxies are strong, chemically-reactive adhesives that form a hard, durable, and water-resistant bond when applied to the surfaces of two different materials.

One-part epoxies are easy to use but not as strong as two-part epoxies, so they’re better suited for small projects such as jewelry making or home repairs.

Two-part epoxies can be mixed together at home and applied with a brush or spatula before curing to form a hardy bond between various types of materials like wood, metal or plastic.

If you need something stronger than what one-part epoxy offers but still want something simple enough for beginner DIYers to apply on their own time then consider using gel coat instead of liquid coatings; it will adhere better than liquid coatings due to its greater viscosity which allows more time for adhesion before setting firm enough that it doesn’t move around once cured (which is why we recommend applying both sides immediately after mixing since they dry faster than other types).

If you still want something even easier than Gelcoat then try using brush-on adhesive instead!

Does epoxy stick to plastic?

Yes, epoxy sticks to plastic. Epoxy is a type of glue that bonds two surfaces together. It can be used to bond plastic, glass, wood, metal and ceramic items together.

You can use epoxy to fix broken or cracked cups and plates. You can also use it to create beads and charms out of old cups or other disposable containers.

What kind of cups can you epoxy?

The answer is that you can epoxy any plastic cup, mug, or tumbler. You just need to make sure that the plastic cups are made from polyethylene and not styrofoam.

Polyethylene has a heat tolerance of 200 degrees Fahrenheit (93 degrees Celsius), so the best way to test this is by placing your epoxy-ready plastic cup in boiling water for two minutes. If it’s still usable after taking it out and cooling it off, then it should be fine for use with Polykote Epoxy Resin.

Polykote Epoxy Resin works well on both single-layer and multi-layer cups as long as they’re made from polyethylene.

The only difference between using single-layer or multiple layers is that you have more working time when using one than if using several together because there will be more glue used when making these types of items at once due to how much surface area there would be available for adhesion purposes alone!

This means the less total time needed before curing occurs when making something like this larger scale though:

Does epoxy melt plastic?

The short answer is: no, epoxy does not melt plastic. It’s important to understand that epoxy is a thermoset plastic, which means that it can only be cured (hardened) by heat and/or a catalyst.

The most common way to cure epoxy resin is with heat—you simply apply an external source of heat until the resin has cured (hardened).

Epoxy used for hobbies and crafts tends not to come with catalysts, so if you’re using store-bought stuff then this will probably be the case for you too unless otherwise stated on the packaging or product website.

Although there are some instances where heat alone may be sufficient to harden your epoxy glue into its final form (e.g., when gluing two pieces of wood together), it’s much more common that you’ll need some sort of catalyst as well in order for full curing to take place without any side effects like warping or deformation occurring afterward; these catalysts can either come in liquid form or dry powder form depending on what type(s) they use as reactant(s).

Depending on what kind of reaction happens inside those little vials when combined with other chemicals present inside them (like those found within liquid adhesives), certain reactions will occur at different rates depending upon whether they’re heated from room temperature up towards their melting points until fully cured through conduction via heat sources like torches or hot plates made specifically for this purpose!

Can you epoxy plastic Starbucks cups?

Yes, you can. This is a great way to make your plastic Starbucks cups stand out and look cool!

There are a few things you’ll need in order to do it:

  • Liquid epoxy
  • Plastic spreader/sponge brush (or something else that will spread the epoxy on without scratching the cup)
  • Paper towels
  • A measuring cup or spoon for mixing up the epoxy

How do you epoxy a plastic tumbler?

You’ll need to clean your cup with soap and water first. Then mix the epoxy according to the directions on its label.

Put some epoxy into your clean plastic tumbler, filling it about halfway. Don’t fill it too full; you don’t want any of the contents to spill over when you’re trying to seal it later!

Let the epoxy cure for 24 hours before using your cup again (or at least for an hour, if you want a quicker drying time).

What kind of epoxy is used for plastic?

Epoxy is a two-part system, meaning you have to mix the resin and hardener together before applying it. Epoxy glues are made of a resin and a hardener.

Resins are polymers that harden when they cure (or polymerize), forming long chains called polymers. The strength of epoxy comes from these chains that form between the molecules of resin and hardener once they come into contact with one another.

The strength of an epoxy depends on how long these chains are in relation to one another—the longer the chain, the stronger it will be!

What’s the best epoxy for plastic?

The best epoxy for plastic depends on the project, the plastic you’re trying to attach, and the epoxy itself. The right glue will depend on your needs and requirements.

There are many types of plastics available today that can be used in many different ways:

  • Acrylics: This type of plastic is great because it’s inexpensive and easy to work with. It’s also clear, so it doesn’t yellow over time as some other plastics do.
  • Polycarbonates: These are very strong, but they may melt when exposed to heat above 140 degrees Fahrenheit (60 degrees Celsius). They can also break down in sunlight over time; if this happens, try using a UV resistant sealer before applying your project so you don’t need any other adhesives afterward!
  • PVC: This type isn’t as strong as acrylics or polycarbonates since its molecules are smaller than other kinds’ membranes; however it does have an advantage when used outdoors because its low surface energy prevents water from sticking easily onto its surface—meaning that rain won’t cause problems later!


We hope this has been helpful for you! If you have any other questions about epoxy or want more tips, please feel free to contact us. We’d love to hear from you!

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Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

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