Along the Illawarra coast, sealing a driveway is more about longevity than appearance. Bare concrete drinks in rainwater, and a surface that stays damp is ideal for mould, algae and black marks. Gradually that moisture travels down to the steel, and close to the beach in Austinmer, Thirroul, Shellharbour or Kiama, salt in the air accelerates the process. Throw in summer UV bleaching any colour and the case for sealing is clear. A good sealer slows the whole lot for a small fraction of what the slab is worth.
Below we explain resealing intervals, which sealer suits which finish, and a straightforward routine that keeps a driveway looking after itself.
What a sealer does
A sealer does several things at once, and appearance is the least of them.
- Keeps moisture out, which means less mould, less staining and less damp getting to the reinforcement.
- Fights stains from oil, leaves, fallen fruit and tyre scuffs.
- Protects colour on decorative concrete that strong sun would otherwise bleach.
- Makes cleaning quicker, since grime and algae find it hard to grip a sealed face.
Resealing intervals for local driveways
Use three to five years as a starting point and fine-tune it for sun exposure. Direct sun breaks the coating down sooner, while shade and carports stretch it out.
- Sun from morning to evening: plan on resealing at about three years.
- Shaded or covered: five years is common, occasionally longer.
- Coloured, stamped or aggregate finishes: go by appearance and reseal once they look flat, not by the calendar.
Choosing between penetrating and topical
Each type behaves differently, so the finish on your driveway largely decides which one fits.
- Penetrating: absorbed into the slab, flat look, can't peel, stays natural, fair stain resistance.
- Topical: sits as a coating, better stain resistance, may add shine and richer colour, must be stripped before recoating.
For a plain grey drive you'd like kept natural-looking, penetrating is normally the way to go. Aggregate, coloured and stamped surfaces usually look and last better under a topical coat. On a shady or damp drive, ask for anti-slip grit so tyres and shoes keep their footing after rain. Our concrete sealing team will pair the right product with your finish.
An easy maintenance routine
A few minutes every so often is all it needs.
- Sweep often so leaves, grit and dropped fruit can't sit and stain.
- Scrub it down now and then with a stiff broom, and keep any pressure washer gentle.
- Seal cracks quickly so stormwater can't seep in and wash out the base.
- Reseal when due, or sooner if rain is soaking in instead of beading.
| Task | How often |
|---|---|
| Clear leaves, fruit and grit | Weekly, or whenever it builds up |
| Wash and scrub | Roughly every second month |
| Treat mould and algae in shady areas | Ahead of winter and the rainier months, then as required |
| Fill fresh cracks | As soon as they appear |
| Water bead test | Once a year |
| Reseal | Every three to five years, or once water soaks in |
Stick with these little habits and your driveway will last noticeably longer for almost nothing. When resealing comes around, aim for a stretch of dry, settled weather, commonly late spring or early autumn, so the concrete dries fully and the sealer can cure before the next storm arrives.
Mistakes to steer clear of
Some common habits cause more harm than you'd think.
- Harsh acid cleaners: these etch the concrete and leave patchy, dull areas.
- Holding the pressure washer too close: it can strip sealer and knock stones loose from aggregate. Reseal after any aggressive clean.
- Ignoring oil spills: oil sinks in fast, and sealing over it locks the stain in for good.
- Sealing wet or grubby concrete: expect peeling or a hazy look within months.
- Sealing fresh concrete too soon: moisture caught underneath turns the surface milky.
Signs the sealer has given up
Check the driveway itself rather than relying on dates. If water beads, the sealer is still working. If it soaks in and darkens the surface, the protection has gone. Fading colour, stains that won't budge and mould reappearing soon after rain all point the same way.
Unsure what your driveway needs?
Not sure if it's due for resealing or which product to choose? Send through some photos or arrange an inspection. We'll let you know whether a fresh coat is needed, what preparation it calls for, and whether any cracks should be handled by our crack repair team beforehand.