Mod Podge
Who doesn't love Mod Podge? Mod Podge is a super versatile option for sealing vinyl. You can choose a between glossy, matte, and glitter finishes.

Mod Podge is also relatively affordable and easy to find in your local craft store. You can choose between a starter pack or a large bottle, and it's relatively easy to use.

The cup seal labels are non-toxic, so it's safe to use on your own or around kids. It's unclear if Mod Podge is dishwasher safe. They do have a dishwasher safe version, but reviews are mixed.

Plus, you have to let your project sit for almost an entire month before you can use your mug.

We think you're better off hand washing a mug that you seal with Mod Podge.

Epoxy
rocords store
Image source: Pixabay

Another popular sealant for adhesive vinyl is epoxy. Epoxy is more heavy duty than Mod Podge, and it can give your mug a beautiful, glossy finish.

The sealant is dishwasher safe, and it's pretty durable in other ways.

Unfortunately, that extra security requires a bit more work. You have to mix the epoxy, and it can harden fairly quickly. Once you mix the epoxy, you can't reuse it.

You have to continuously mix the epoxy for about 15 minutes, but that work is usually worth it. When you apply epoxy, you don't have to worry about creating an even layer.

Epoxy is good at leveling itself out, and it looks good.

Polycrylic
The third type of vinyl sealant is called polycrylic. It's an excellent all-purpose sealant, and it comes in a spray form.

If you prefer to spray sealant instead of applying it like paint, it can make the process easier.

However, you have to make sure to apply thin layers. If you apply one thick layer, it can curl in on itself. But if you spray thin layers and allow them to dry between layers, it works well.

However, if you want to be a bit more delicate, then you should consider a different type of sealant that you can apply by hand.

If you do decide to go with a polycrylic, make sure it is, in fact, a polycrylic and not polyurethane. Polyurethane can yellow over time thus ruining the look of your mug.