Water pump sealant or no sealant?

I drag this type gasket between 2 fingers loaded with RTV just enough to saturate the material.
I'm going to speak of different animal. If you pull the water pump off a 2011 RAV4 you would find a fancy stamped steel gasket. I don't know how the factory installs them and never have a leak. It wasn't stuck at all, fell right off. New and perfectly machined mating surfaces must be a factor.
Most of the aftermarket replacements at rockauto don't include a gasket. RTV required. If you buy the OEM Asain pump with that fancy metal gasket, you damn sure better put some sealant on it. It wont seal for us like it did for them. I learned this the hard way. Worst part is, I called a guy to ask, and he said, "I always put a little sealant on them just for insurance". My fault was being hardheaded.