Road workers went to great lengths to get State Highway 1 open and even mopped water off the surface with towels so lines could be painted.
The major transport artery was severed last Sunday, because of an underslip on the southern side of the Brynderwyns after heavy rain.
The underslip, about 20m long in the northbound lane, had fallen away leaving an 8m drop to the ground below.
Repair work began immediately and at 10.15am yesterday the road was opened to all traffic.
Sealing work began about 8pm on Thursday and was completed by 3am yesterday.