What do you guys put on head bolts to stop coolant seeping?

[vertical800]

I put new head o rings in my 910 big bore and 1 of the head bolts seeps coolant. What do you guys put on the bolts to stop it? Appreciate any help.

 

[Goinboardin]

Put a little of this: http://www.permatex.com/products/pr...rmatex-high-temperature-thread-sealant-detail on the bottom of the bolt head. The 6mL container has done 3 or 4 seal jobs on my 800 with enough left of another. Not leaks yet. I think I picked it up at Napa, but really don't remember.

 

[vertical800]

Thanks I'll give it a try.