Rubber seal under garage door

[danielr112]

What are some good rubber seals to use for my garage?

There's also the question of how much space I should have between the door and the concrete floor.

I was contemplating if I should use bicycle inner tubes that I sew there. That is, 2 rows. Maybe that's enough?

 

[Togo]

There is a robust rubber strip from Tesa specifically intended for garage doors.