I haven't used those, but I did mount my first rack of PVs on my roof over 20 yr. ago. I used lag bolts into the joists, silicone sealant around them. It worked fine, but ten yr. later I decided to reroof the house to go to metal after a lot of fires around here [cedar shingles originally]. Removing the pv rack was a royal pain, and I moved them permanently to the hillside behind my house so I'd never be faced with that again. However, that will be your neighbor's problem someday and not yours.... Anyhow, regular good-brand silicone worked for me, at least for the ten yr. or so they were up there. [I had angle iron bolted to the roof, the legs of the pv rack bolted then to the angle iron, silicone in the bolt holes and around them for a couple inches...no leaks.] There is a newer stuff called Through the Roof that I've just begun trying. They claim it sticks to anything roofwise. But I am not recommending it...yet. When I say "they claim," I mean the mftr., and I have no reports from any users.