If you mean Mothers Back to Black, that's not a dye, and it isn't strong at all. I've used it in the past and found that it works OK, but lacks durability. Forever Black is a permanent dye (as opposed to a dressing), and I stay away from that stuff. Perhaps that is what X5Jay may be referring to? There are so many black bumper & trim products out there...it gets confusing.

I've heard that Black Again is a good silicone/polymer based product, but I have no personal experience with it. It's supposed to be durable, and a good product for the "wax on the bumper" problem, provided that the surface is properly prepped. hayaku recommends first removing the wax from the bumper & trim using a "paint prep solution (pepsol or acrysol), 50/50 water/vinegar mix, alcohol/water, etc.," before applying the dressing of your choice. Link

I've been using Griot's Vinyl & Rubber Dressing, which is non-silicone based, with good results. I find that is lasts somewhat longer compared to Back to Black. I've also heard very good things about Aerospace 303 and plan to give that a try when my current stock of products is depleted.

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