Wallas Thru Hull

[Phantom]

Guys and gals, I'm a newbie here, but I can add a bit to the discussion.

Permatex makes a silicone type sealant called Ultra Copper Hi-Temp Silicone Gasket. Part No. is 101B. Comes in a 3 oz. copper colored tube.

Rated for 650 degrees F. Water and oil proof. Low odor. Non corrosive. Safe on aluminum. I think the tube in front of me cost about 5 or 6 bucks.

I have used it for years on header pipes on motorcycles. It takes the heat and lasts.

It's a sticky mastic kind of stuff, so don't get it where it does not belong.

To me, this stuff looks like it might work for that kind of repair.