No, haven't used it, yet. Only problem I have with the membrane, other than long time to work it down, is, if you mess up, somewhere down the line, before the panel is completely down, you will probably break cells trying to correct the error.
The Silicone will give you time to inspect all the wiring, connections, and position of the cells, before it starts to set up. It will take several days to get semi-cured, so, I feel confident it will be OK.
Also, not that I'm wealthy, but, if the panel has a shorter than expected life, I think that cells and or panels will be more affordable, as the years go by.
I have tried to contact the poster from the thread I linked to, to get an update. Seems to have vanished into this air ?? Don't know if that is good or not
Can't remember if I asked you before, but, have you watched videos of the film being applied ?? Sure would recommend practicing first, before doing a panel for sure. That Sylgard is just too expensive for me.
Daylight down here, is, from 5AM or so to 6 PM or so, year round, so, I have plenty of time to work on stuff, where I can't do much outside. I figure to have around $78.00 per panel, if all goes well.
How soon will you get started on your panels ?? Please post success or failure. I will do the same. Good Luck.