famous bob said

the most important thing is start tight against the flanges, keep them tight all the way, and tie them down in a few places and at the ends. you can paint them and the straps w/ high heat paint, has worked very well for me. do wet the wrap before you start, and keep it wet, wear long sleeves, because your going to get the fiberglass in your arms and hands.------bob

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ntsqd said

Friend used it on some headers. Danged near burnt the car to the ground because of it. ATF cooler line leak sprayed ATF onto the headers. Couldn't put the fire out until his passenger spotted a nearby garden hose. On removal he found that the rust errosion of the headers had been accelerated by the higher heat of the wrap. ATF lines got replaced with industrial hose & JIC fittings.

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