Thread Sealant for Coolant Parts?

coalman said

Any recommendations for above. I have seepage coming from the water pump bypass fitting 360 LA engine. Replaced the fitting still does it, been using Permatex in the small plastic jar. Thanks

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I used to use red silicone on everything until I started having exhaust stud leaks.
Emailed Permatex and they recommended they new Ultra Grey High Torque silicone.
Used it on the exhaust studs and no leaks for 6 months.
https://www.permatex.com/products/g...igid-high-torque-rtv-silicone-gasket-maker-2/