I’ve always been amazed at the fact that common household paint contains enough adhesive power to render windows immobile to the point that Vasily Alexeev himself would not be able to budge one. Since this is the case does it follow that paint would make an excellent adhesive?
Paint is good at resisting sheer, the type of force encountered in sliding windows. However, it’s lousy at resisting tension, because it has little mechanical strength.
I think it has to do with it drying fast enough so a larger amount can adhere to the surfaces.
That and maybe its brittle.
Could be you’re weak though 
Paint would make a lousy adhesive. Windows stay shut so well because there’s usually a very large area painted over to hold it shut.
Easy comparison:
Spread some wood glue on a couple of pieces of wood and clamp them together.
Spread some paint on some pieces of wood the same size as the other two and clamp together.
Once the stuff has dried, try pulling (chiseling) them apart. The painted pieces will pop right apart along the painted surface - the glued stuff will be (almost) impossible to get apart without damaging the wood.