Ultra Gray or Ultra Black RTV

I use the 3M weather adhesive to glue it on the heads and I buy the big tubes of Ultra Black RTV from Advance Auto and apply it THINNLY to the intake side of the gasket.. I usually spend my points money to buy my Ultra Black.

China wall I lay the intake on DRY and take a black magic marker and trace where the intake sits. Then after I remove it I use my caulking gun with a tube of Ultra Black on it and lay down the bead needed. By checking it dry I get an idea how high of a bead I need then I lay a horizontal bead across the valley were the head and block meet.