I bought this Acrylic Sealer right under all the acrylic paints.
It doesn't say anywhere on it if it is Non-Toxic. Should it be safe to use if I just let it air out for a good amount of time?
There should be a phone number on the can or the store should be able to provide a way for you to contact the company. Otherwaise you may even be able to find the MSDS online. Usually the acrylic sealers at the craft stores that are safe for dishes will state it right on the can. Otherwise, I'm not sure.
No, but I had the same problem with another brand. I e-mailed the company and they responded back that these types of paints are toxic while they are in a liquid/spray state, but as soon as they dry they'd let their babies eat off it. I made sure that they'd tell me the truth by telling them it was something my (non-existant) kids might put in their mouths and such, so the paint had to be safe. So I'd call them or email them to see what they tell you.