ied that
I`ve had wrap on 3 diff. cars headers. I have seen 100% humidity here and it not raining (was a few yrs back ), and have had wrap on 3 diff. cars, and had no rusting or cracking problems. I figure the cracking problems u guys are having is coming from cheap headers. What is this silicone spray ur talking about, never heard of it ?!? Of course there`s a lot I haven`t heard about !