I'm a caretaker for a house that has a slate roof system called Nu Loc. I need to find something that can bond slate to slate. Something that will hold up to wind off the ocean & the high temp of the roof. In Maine it doesn't really get that hot except for this week is unusual. It's to be used on some slates in the valley's, ridge, & hips......It has to be from experience & NOT from advertisement....something that you might of used for slate or stone. It was suggested 3M 5200.....3M doesn't suggest it for stone. PL Premium Advanced seems to be the closest so far & is rated for slate but not high heat....Any help on this would be appreciated.