The compression from the rubber donuts around the perimeter serve that purpose. Those "push" the valve cover gasket into the head.

I've seen people use all kinds of weird stuff to try to seal those. I've also seen oil leak into the seating channel for the valve cover and leak up and out over the top of the gasket when people "glue" the valve cover to the head.

The gasket leaks when, for one reason or another, the "pushing" force of the rubber gaskets is so longer enough to provide enough sealing force to resist the crankcase pressure. If gaskets are failing prematurely, I would be investigating the CCV system, not trying to modify the gasket to be "glued" to the head.