What do you use to seal bolts that go into water?

What sealer do you use on bolts and studs that go into water jackets?

A good thread sealer, liquid pipe teflon ,GM thread sealer, Permatex and adhesive silicone all have work okay for me on stock cast iron heads sealing up header bolts
IHTHS

BLUE MONSTER

Loctite 545

https://www.henkel-adhesives.com/us/en/product/thread-sealants/loctite_545.html

I should have stated I have used Permatex PST in the past on steel block's and heads and various bolt types.
But used Nickel Anti Seize on Aluminum items with Stainless bolts.
But I have a small leak where the water is seeping past the threads.
So did not want Locktite type stuff on them.
Ij net have also the one bolt may have been bar and it has nothing on it.

I've had good luck using this product

loctite 567 teflon paste. this stuff is good for everything.
https://www.henkel-adhesives.com/us/en/product/thread-sealants/loctite_567.html

Yep!! That's the stuff!! Been using it for years!

X3

I agree, Blue Monster.

Lots of people shy away from this product because of cost, but it is an excellent product. Another one is called "TrueBlu", it has never failed me in any of the applications I've used it in.