Leaking Thermostat Housing. Thinking on billet with O Ring

I just put one of those Billet Specialties housings with O-ring on my intake. I prepped the intake side by stripping all old gasket and sealer off and block sanding it. Then I bolted on the new Billet Specialties housing. It completely cured my leak problem. Did not use any sealer or anything else with it; just the O-ring. I would not use anything else after going this route.