Well I finished the caulking and used 17 - 29oz tubes of the Vulkem 45 SSL in white ( I had 300 feet to caulk). The longest part was all the prep work -- removing the open cell spacer foam between the coping and the deck, cleaning out the space and the stuffing in the backing rod. That took a whole day to accomplish.

Working with the Vulkem 45 SSL was generally easy. The flow is controllable so that you don't need to mask the edges. I filled the voids up to 1/16" from the edge and in cases where I needed to go back over an area to bring up the height, the caulk smoothed over without any problems. There were a few times where I had to pop trapped air bubbles but that didn't create any problems. 95% of my caulk job is completely smooth and flat; however, there are a few places where there are slight waves in the caulk. They aren't really noticable (at least not in the white), but be aware that it probably takes a lot of practice to get a perfect job. I was quoted $3200 to $4000 just to caulk my deck. I paid $460 for the tubes and took two days to do the job. Even though I got a little sunburned, I happy with the job and ecstatic that I saved over $2700 by doing it myself. Maybe SL caulk would have given my the perfect job, but since this was my first time doing this, I used the SSL and it came out pretty decent.

I can't comment on longevity since I did the job in mid August. Time will only tell. Hopefully, it will be a long time before I have to do this again.