How long until I can drive on my driveway?

You can drive over it immediately, however, do not park on it for 12 hours, the foam goes in at 130 degrees, and has to cool down, the more it cools off the harder it gets.

What kind of a warranty does it come with?

It comes with a 2 yr warranty, if it were to settle again, we would come back and drill through the same holes and inject a little more to bump it back up a little.