PVA stands for Polyvinyl acetate with a chemical formula of (C4H6O2)n. Its pretty much regular white glue (aka:wood glue, school glue, Elmer’s glue, Tacky glue, Titebond, and so on). There may be some differences in PH* content such as Elmer’s glue has an acidic PH of 5 along with other ingredients while other PVA glues have a PH ranging between 4 and 6.
It’s funny. For the longest time I thought that this was some rare special glue that I had to order online or look all over the place for. Earlier today I finally thought, “Hey, what is that stuff?” So I looked it up and was like “OOOOHHHHH!” Well, now I know, and you do, too. 😉