One of the most failed purchases I have made...
It seems like a good solution with the seal of a reputable company BUT:
I followed the instructions, cleaned it very well, dried the area with a hairdryer, and applied it.
Firstly, in the corners, it simply doesn't "stick" properly, it bends and comes off.
Secondly, on straight surfaces, it adhered well when heated, but the next day (before the 24-hour period without water had passed) I touched it... again with the hairdryer, etc... and it was the same story.
Unfortunately, it is a failure and it is expensive. It's better to use silicone caulk.