I've used 3 or 4 Dicor sealants..nothing but great.
The exception has been my black fender skirts...Dicor doesn't make a sealant in black. And seemingly, my fender skirts are made of Teflon or something, cause NOTHING sticks to them. I've tried all sorts of sealant and have grown tired of removing and reapplying new sealant to test.
2-3 times per year I have had to repair this fender skirt seal, until now.
I found 3M windshield adhesive to be my sure for my black fender skirts!
http://www.amazon.com/3M-08693-Urethane-Windshield-Cartridge/dp/B000RW1XCK/ref=sr_1_sc_1?ie=UTF8&qid=1433120341&sr=8-1-spell&keywords=3m+windsheild+adheive