can you epoxy plastic cups?

Epoxy resin is a popular choice for crafting and fixing, but some people are hesitant to use it on plastic. In this guide, we’ll answer common questions about using epoxy with cups, bottles, and other items made of plastic.

Can you epoxy over plastic cups?

The answer to this question is a resounding yes. Epoxy resin is flexible and can be used on many materials, such as wood, metal, and glass.

However, it’s important to make sure you’re using the right type of epoxy resin because there are two types: regular epoxy resin and fast-curing epoxy resin (also known as two-part epoxies).

Regular epoxies take longer to cure completely but they won’t peel off when it comes time for you to remove them from your project.

Fast-curing epoxies are less expensive than regular ones and they’re great for smaller projects where a precise application isn’t necessary or possible due to its high viscosity level — that means it’ll take longer for the gluey liquid inside each tube when mixed together so mix only as much as needed at a time!

Can you use epoxy resin on plastic?

Yes, you can use epoxy resin on plastic.

The best way to get a good bond with the material is by using a plastic hardener.

This will also help prevent cracking and shrinking.

If your plastic is clean and dry, free from grease, oils, or dirt, free from cracks and holes then it should work well with epoxy resin

What kind of cups can you epoxy?

You can epoxy plastic cups, tumblers, and other containers. The best ones to use are those that have a smooth surface. If you’re using any of the following types of cups, they work well:

  • Plastic cups with lids
  • Plastic tumblers
  • Plastic cups with straws (the kind you use for juice boxes)

Plastic cup types that work less well include:

  • Those without handles or lids (because it makes them difficult to hang)

Can you epoxy a Starbucks cup?

No. You can’t. Epoxy resin is not recommended for paper, which is what Starbucks cups are made of.

  • Can I use epoxy over a plastic cup?

Yes! Epoxy resin works great on plastic and it will stick to a plastic microwave-safe cup just fine.

  • Can I use epoxy on any other kind of cup?

Yes, but be careful because there are different kinds of epoxies out there and some are more suitable than others depending on what kind of material you’re trying to adhere something onto/in your home or car’s dashboard if that’s where you’re working with these things at home instead of outside watching football games all day long every weekend as everyone else does during football season

How do you seal plastic cups?

There are many ways to seal plastic cups, so you can choose the method that works best for your situation.

  • Clean the cup with soap and water. This will remove any dirt or grease that may be on the cup, which can help the adhesives stick better.
  • Dry the cup with a towel, if necessary. This will remove any excess moisture from cleaning it with soap and water, helping to prevent uneven adhesion.
  • Apply a primer before applying epoxy glue or adhesive. Primers improve adhesion and reduce the warping of plastic parts by filling in microscopic pores on the surface of your materials. They also act as an intermediate layer between two different types of plastic (such as glass versus metal) so that when one type applies pressure against another type during assembly there is less chance for separation due to misalignment. If using this method, make sure not only do both sides have primer applied but also let dry completely prior to application because otherwise, it could cause bubbles under epoxy which will make them harder/impossible to fill up without sanding down first.
  • *Note: With this method, we recommend using our standard size bottle since they tend not to cause bubbles even when applying multiple layers per side; however if needed then try applying smaller amounts at once instead until the desired coverage has been achieved before moving onto next step!

What is the best epoxy for plastic?

Epoxy is a type of glue that can be used to bind plastic. Epoxy, or epoxide resin, is a two-part chemical compound made from epoxide hardeners and organic compounds called monomers.

This type of chemical bonding forms exceptionally strong bonds between the molecules in the resin and hardener. The polymerization process for epoxy adhesives has high tensile strength as well as thermal resistance and chemical resistance properties.

What makes it so good at bonding? Well, let’s break it down: First off, there are really only three main types of glues or adhesives that you can use to bond materials together: solvent-based glues (like rubber cement), water-soluble glues (like Elmer’s Glue-All) and the all-purpose superglue.

Glues like these work by dissolving in one substance before being applied to another—you can see how this means they’re not very permanent! Epoxies are different because they chemically react with each other instead of dissolving anything else; this makes them much stronger than your average glue stick.

What plastic does epoxy not stick to?

Epoxy sticks to plastic. That’s a fact. But there are some plastics that epoxy doesn’t stick to, or at least not as well as other plastics. The most obvious example is styrofoam (polystyrene).

Epoxy does not bond with styrofoam at all, and if you use it for an epoxy project where you need strength and durability, you will be disappointed in your results.

Another type of plastic that doesn’t bond well with epoxies is soft PVC (polyvinyl chloride) like the kind used in plumbing pipes and tubing.

Although technically this type of PVC can be glued together with an adhesive like silicone caulk or ABS glue, neither one of those substances are as strong or durable as epoxies — so it’s best not to try using them together if your goal is longevity and performance over time.

How do you prepare plastic for epoxy?

If you have a lot of plastic cups to fix, it might be worthwhile to simply repurchase new ones. However, if you’re working with a few cups here and there or are just curious about the process, follow these steps:

  • Remove any dirt, grease, or loose parts from your cup. Use soap and water or a mild detergent to clean off as much dust as possible and then rinse your cup thoroughly.
  • Repair any broken parts that could easily fall out during epoxy application (such as caps) by gluing them back into place with superglue or epoxy (if desired). Be sure not to get any glue on the inside of the cup—you want it completely clean for painting!


You can use epoxy resin to seal plastic cups. You can also use it on clear plastic, but not opaque or colored plastic.

The best epoxy for sealing cups is a two-part epoxy resin system that will form a tough bond with the plastic and prevent the cup from leaking any liquids through the top or bottom seams.

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