Leaking Valve Cover Gaskets

Well,I was driving the Duster ,and just when I thought everything was fine and dandy,smoke came out of the hood.I pulled over quick(fire extenguisher in hand)popped the hood thankfully it was not on fire,but noticed oil was leaking from the valve covers and dripping on the hot headers.So I go to get new ones and blah,the still leak.Looks to be leaking from where the gasket mates to the valve covers.y valve covers are Edelbrocks,and they are not to tight,or loose or warped in any way.Would it be ok to lay a bead of sealant just to the surface of the valve cover?I dont want to seal where the gasket mates to the head incase I need to remove the valve covers.