I've used Black Again and CG's New Look Trim Gel and find CG's to be the winner here. In one instance I applied them side by side on my honda van just about two weeks ago. Since then the van has been driven a few hundred miles and rained on plenty here in ohio. In applying them you can notice the CG's is thicker and seems to go further where with Black Again I needed to go back frequently for more to get the same area of coverage. On the vertical surfaces ( panels around windows on front doors ) they both seems to be holding up fairly well but on horizontal surfaces ( rubber strips on roof, roof rack, step on rear bumper, front grill) the CG's seems to be holding up better keeping it's richness as if it attaches itself better somehow and holds on longer.