I removed my head cover, and head this year in anticipation of getting the head modded, but can't now, (kid going to college), and when I took the cover off, I noticed some white gooy stuff around and just under the cover bolts. I'm assumin this is to make a seal around the bolt shanks so coolant doesn't leak. WHat is this stuff? I am going to put the sled back together this weekend and I need to get whatever it is. Jay.