Schumacher header exhaust coating

I've ran wrap on headers for years with zero problems. Current set on my beaten to death 5.0 mustang have been wrapped and driven rain or shine for about 12 years. And I flat out abused that car. No leaks or rust holes, although if I unwrapped them I'm sure they're ugly as hell underneath. Wrap gets a way overblown bad rep in my opinion. I love the stuff and what it does. Underhood stays cool, if I brush the pipe working on a hot motor it doesn't burn me, no burnt plug or starter wires, and trans cables stay happy. I run it on my street and dirt bikes as well with zero problems. My 2005 R6 got wrap the second day after riding it home from the showroom floor, and its still on with zero problems.
Now having said all that-I live in Northern California-not a lot of humidity or salted roads here haha. I'm sure a rust belt car would probably be much more prone to problems. The mustang did see 5 years of (rain snow or shine) daily driver duty in Brownsburg Indiana, so it did see some road salt and snow. FYI fox body mustangs aren't much fun in the snow on drag radials! Don't ask.
Just my experiences and as usual, YMMV but it's not always a bad idea.