Thanks y'all. I know permatex would work and be heat resistant, only I know for certain that that is not what has been used before. The old stuff, probably original, was white and had the consistency of 4200. I just had some recent work done at Schooner Creek Boat Works in Portland, OR a few years back and they sealed up the new hoses with a white 4200 like stuff. It is flexible, but pretty firm and yet not impossible to remove.
That is why I was wondering about 4200. Since I already have 4200, I would rather not go out to buy the high temp silicone, which is the Permatex, if what the boatyards are using is what I already have. Again, all these junctions are downstream of the raw water injection and so none of this gets up much above maybe 150 degrees F. I can touch it comfortably during engine operation.
I've searched around on the 3M website and found nothing definitive. I've googled it, and found nothing either. Figure I will call Schooner Creek Boat Works on Monday if I don't answer the mystery of this white 4200 like substance before then.
Thanks for the suggestions...
