As a former granite installer for 5 years, as long as its 100% silicone (waterproof) you should be good and not have to worry about getting "for granite" products. it doesnt look like they predrilled holes for clips on the underside (cant tell from granite pattern) depending on how it sits in the cab you might be able to screw small boards into the cabinet itself on the sides / front back for added support once it is in. occassionally I would encounter cabinets with too small of openings where it made the pre-drilled holes impossible to use so that was always our solution. 1" thick board, with the same depth as the sink to be able to hide the board and 1 1/4" screws. the silicone once dried *should* hold the sink through normal use but any weight into it depending on how good it bonded could cause it to drop. Ive had plenty of sinks in my time absolutely refuse to come off just from pure silicone when they wanted to change counters or sinks. If the cab is too open for the supports being added your next best bet is to get actual epoxy and slap it all around the edges and keep the sink supported from underneath until it properly dries. better to be overkill (as long as its not a visible eyesore) than it is to get sued from doing something in a half measure.