Installing pan gasket with motor in car

Dont use rtv with paper gaskets? Curious as to why just because I hadnt heard that before? That might be the reason for my thermostat housing leak cause it is a paper gasket and I used RTV. Can somebody get the aviation gasket maker at just any auto part store? Do you guys have a preference between gasket/gasket maker vs just RTV? I will check the holes before hand to see if the holes are bent (done that before). I am hoping theyre good because the one piece seal had metal sleeves to keep from crushing the gaskets.

I bought some at NAPA. The 4 ounce bottle is part #80019.