Dicor or Eternabond Tape -Which is Better

Thanks everyone for your helpful comments. I have found out that for cleaning the old Dicor bead and surrounding area to a nice white finish using a brush and a rag with Coleman Camp Fuel works real well and evaporates quickly and does not leave a residue like Varsol. Whizbang thanks for tip on removal of old Dicor. Where I am concerned that the old Dicor is in real bad shape or I don't want any more build-up of Dicor I will remove it using that method. I have such a place on the skylight that I want to check more carefully before re-caulking that area. By the way, curing time for Dicor is 5 minutes to skin over, 4 hours to become waterproof but experience suggests up to 12 hours to withstand a real heavy prolonged rain without damage, and 48 hours for 80% cured and 30 days for 100% cured so chose your time interval to apply the Dicor carefully. The information is not on the caulking tube. Their website indicates the following - Lap Sealant Cure times.
5 Minutes - Skins over
4 Hours - Waterproof
48 Hours - Cure 80%
30 Days - 100% Cure
I will provide pictures of finished job when done. Thanks again everyone.