I really don't know about food safe. Or safe for any end consumer, really. They absolutely need to do some severe toxicity testing. Because this funny new glue is an organic phosphate which in itself already raises some serious questions. On top of that, the ring also contains two perfluoropinacol moieties which could be released e.g. on heating or through interaction with acids or something else. This is a highly volatile molecule and "fatal in contact with skin," i.e. of the highest toxicity class. That ain't no good.