Need advice on how to fill a gap between my (dark grey/nearly black) cement imprinted driveway and tarmac driveway front. The gap is around 2-3 inches wide and is about 1ft deep (it has armoured wire running along and crushed brick on top).
What would be the best solution? need to make it blend in and look good! Is there a grout like substance? or anything else suitable?
Thanks in advance for the advice