You dont need to use any type of gasket sealer. But I always do. I usually apply something like Permatex Hi-Tac to water gaskets. Just to fill the little imperfections in the metal.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.