We have a stone aggregate concrete patio and I'm considering sealing it to
protect against the possibility of someone dropping a bottle of red wine on
it :-( I have no idea if people typically seal them or just power hose it
off if such an accident happens.

Have you sealed a concrete patio?
Concrete or concrete aggregate?
Did the sealer last well over the years?

Any idea which sealer is the best to use?

Kind regards,
PK