So I recently went out and bought some bricks of Bikes, i opened them and the seal seemed a bit darker than usual, i compared it to a normal seal and sure enough it is black...(see picture)... So for all those people out there who use seals in their magic, I would suggest getting new ones, however blue seals are still usable if you are using them to seal an opened deck, although they can't be used for too much more.
Best,
aa.magic
Best,
aa.magic