Should I put gasket sealant around the ends of the lower gasket (the Chilton book states to use a "Silicon Sealant") ???

I believe I know my answer but I thought I would ask, after two attempts in replacing the lower gasket with in one week after using RTV red, I am getting coolant leaks.

Is there a trick that I am not aware of here ?? I am about to dump the coolant again and redo it all again, I really taking on these projects on Sunday!

HELP !!