I got a roll of 3in by 50 ft roll of fiberglass today, and was wondering if I could use this as a header wrap? Does anyone know what header wrap is normally made out of? And can this destroy my headers? I've heard of guys destroying their headers with wrap on them, i.e. welds getting too hot and cracking. Well i'm looking for suggestions so let me know. I already used some to cover my plug boots. It seems like they we're getting really hot since my header install.