Balcony floor water proof coating (roof type of coating? )

[Mary Jay]

Hi guys,

So I need to paint the balcony (the floor of the balcony, people stand on it) with a special coating that is water proof. I had a handyman come and he said the roofer has to do it. I called the roofer and he gave me an estimate of a 3k to apply that coating.

What kind of coating is it?

I guess it should be reapplied every few years or so to make sure the floor of the balcony stays water proof...