Brussels is 5 hours ahead of São Paulo
Best overlap: 8:00 AM to 1:00 PM in São Paulo is 1:00 PM to 6:00 PM in Brussels.
São Paulo and Brussels overlap from 8:00 AM to 1:00 PM (São Paulo) to the equivalent 1:00 PM to 6:00 PM in Brussels — that's your meeting window. The shared window is roughly 5 hours; treat its midpoint as the default and you'll keep both teams happy. Bear in mind Brussels shifts for daylight saving while São Paulo stays fixed — recheck these hours after each clock change.