Sealing protects concrete against moisture penetration, staining and UV fading, all of which move faster in Newcastle than inland — high summer UV, humidity, and salt carried on the sea breeze all work on an unprotected surface. Expect the concrete to be cleaned and repaired where needed before a suitable sealer is applied, forming a barrier that holds colour definition on coloured, stamped and exposed aggregate finishes. A sealed driveway is also far easier to clean, so oil marks, efflorescence and the grey film that settles on coastal properties come off with a hose rather than a scrub.
Recoating is generally needed every few years, and sooner on a west-facing driveway in full sun than on a shaded southern side. Sealing remains a low-cost measure compared with what it costs to repair or resurface a surface that was left unprotected.