I ordered caulking on line and spoke to a real person. They had every caulking available. My original choce was Sikaflex. They had it but recommended Dicor. They said it takes Sikaflex a long time to cure and it picks up dust and dirt during that time and dries softer. Also that Sikaflex drying slows with some cleaning chemicals and that is why they also sell special cleaning solution. They did say it was also a very good product but I would happier with Dicor. I bought Dicor self leveling and some eterna bond tape. Did the job myself. Cleaned with mineral spirits first.
You can download Sikaflex specs. I did before I bought the Dicor.