Wondering if any of you have had experience with the Caswell Epoxy (PHENOL NOVOLAC); Bill Hirsch Gas Tank Sealer (similar to Randolf 912); or the aviation slosh sealer like the 3M 776 and PRC SLOSHING SEALER PR-1005-L (Buna-N) ?

I've read too many bad reviews on the POR-15 marketed US Standard Tank sealer, and that Kreme also "flakes off" esp. if there is any alcohol in your local gasoline.

TIA,
:-) neil