Sealing and maintaining concrete in Rockhampton.
Concrete is close to maintenance-free, which is why most people do nothing until the driveway looks chalky and tired. Here is the honest version: what actually needs sealing in this climate, what does not, how often, how to clean it without wrecking it, and what the whole thing costs.
Curing is the maintenance that matters most.
Nothing you do in year five will fix what happened in week one. Concrete keeps gaining strength for as long as there is moisture in it to keep the cement reacting, and the first seven days are where most of that happens. In a Rockhampton summer, a slab left uncovered in 34 degree heat with a westerly across it can lose its surface water in hours, and the top few millimetres simply stop curing. That slab looks identical on day one and is dusty and crazed by year two.
So the aftercare instructions we give are short and boring: keep it wet or keep it covered for seven days, walk on it after 24 hours, keep the car off for seven days, and keep anything heavy off for 28 days, because 28 days is where the design strength in AS 1379 is specified. If we have applied a curing compound, leave it alone entirely. The timing of the pour matters here too, which is covered in the best time of year to pour.
What actually needs sealing.
No, and we will tell you that honestly. Plain grey concrete does not need a sealer to survive. It will last decades unsealed. Sealing plain concrete is a choice about appearance and stain resistance: it keeps oil, tyre marks and red Central Queensland dust from soaking in, and it darkens the colour slightly. Where a sealer is genuinely worth the money is on exposed aggregate and coloured concrete, because there the sealer is protecting the finish you paid extra for, not the concrete underneath.
Put simply:
- Coloured and stencil concrete: seal it, and keep it sealed. The oxide colour sits in the top layer, and UV plus wear takes it. This is the one where lapsing costs you the look you paid for.
- Exposed aggregate: seal it. The sealer holds the exposed stones in the matrix, keeps the colour rich instead of dusty grey, and stops oil sitting between the pebbles.
- Plain driveways, paths, shed slabs: optional. Seal if you want stain resistance or a slightly richer look. Do not seal because someone told you it will not last otherwise.
- Inside a shed or garage: a sealer or densifier is worth it purely for dust control, which anyone who has swept a bare shed slab already understands.
One warning specific to a wet climate: a heavily sealed slab is slippery when wet. On a sloping driveway or around a pool, ask for a sealer with a grip additive. It costs a few dollars a square metre and it matters the first February you walk down it in thongs.
There is a standard behind that, and it is worth naming when you are getting quotes. AS 4586 classifies pedestrian surfaces for slip resistance using a pendulum test, giving a rating from P0 at the slippery end through to P5 at the grippiest. The companion guide, HB 198, sets out which rating suits which location, and external areas that get wet, like ramps and pool surrounds, sit at the top of that range. A gloss solvent-based sealer laid over smooth steel-trowelled concrete can drop the surface well down the scale once it is wet. The same sealer with a fine polymer grit stirred through it keeps the finish and keeps the grip. If a sealer quote for a pool surround or a sloped drive does not mention slip resistance at all, that is a fair question to put back to them before you accept it.
How often, in this sun.
Every three to five years for decorative concrete, and closer to every two to three years for anything in full sun or within sight of the water at Yeppoon. The Central Queensland UV load is the reason. A sealer that would last seven years in Hobart is being cooked here from 6am, and once it goes chalky or milky it has already stopped protecting the surface. The simple field test is to flick water on it: if it beads, the sealer is alive. If it soaks straight in and darkens the concrete, it is done.
Coastal blocks get a second hit. Salt-laden air off the Capricorn Coast is harder on coatings than the same sun inland at Gracemere, and the sealer goes first. If you are at Yeppoon, Emu Park or Zilzie, assume the shorter end of the range and do the water test every spring rather than waiting for it to look bad.
How to clean it without wrecking it.
Hose it, use a stiff broom and a pH-neutral cleaner, and keep the pressure washer sensible. A 15 or 25 degree fan tip held well back is fine. A zero degree turbo nozzle jammed against the surface will strip the sealer, cut lines into the paste and, on exposed aggregate, blow the stones loose. Never use hydrochloric or brick acid on decorative concrete, because it eats the cement paste, dulls the colour permanently and strips the sealer in one pass. For mould and lichen on a shaded south side, a diluted household bleach solution left to dwell then rinsed does more than pressure ever will.
The turbo nozzle is the number one way people destroy their own driveway in this town. It feels effective because you can see the clean stripe, and that stripe is you removing material. If you can see individual pass lines afterwards, you have cut into the surface. Back off, widen the tip, slow down.
Think about where the water goes, too. The stormwater drain in your kerb is Rockhampton Regional Council infrastructure and it does not go to treatment, it goes to the Fitzroy. Degreaser, sealer stripper, bleach and acid rinse are all things councils take a dim view of seeing run down the gutter, and it is the sort of thing a neighbour reports. The practical version: keep degreaser and stripper on the slab, soak it up with an absorbent and bin it rather than flushing it, and save the free-rinsing for plain water. It is also just better cleaning, because a degreaser that gets hosed off after thirty seconds never had time to work in the first place.
On stains: act fast and match the treatment to the stain. Fresh oil comes up with cat litter or a dry absorbent left overnight, then a degreaser and a stiff broom. Old oil that has soaked in needs a poultice, meaning a degreaser mixed to a paste, spread on, covered and left to draw the oil out over a day. Rust from steel furniture or the reo of a nearby fence needs an oxalic acid based rust remover, not a general acid. On sealed concrete you have far more time, because the stain sits on the sealer rather than in the concrete, which is the single best argument for keeping the seal current.
Joints, drainage and the wet season.
Two five-minute jobs do more for a Rockhampton slab than any sealer:
- Keep the joints filled. Control joints and the gap between slab and house are meant to be sealed with a flexible sealant. When it perishes, wet-season water runs straight down the joint and into the subgrade, which is precisely how you get uneven soil moisture under a slab on reactive clay.
- Keep the water moving away. Clear the downpipes and the surface drains before November. Water ponding against one edge of a slab through the wet swells that soil while the rest stays dry, and that is the mechanism that heaves slabs here.
That is not sealer talk, that is soil talk, and on this ground the soil wins every argument. The full explanation of why is in slab prep on reactive soil. If you have already got movement, which cracks to worry about will tell you how serious it is.
What upkeep costs.
In 2026, expect roughly 12 to 25 dollars per square metre for a clean and reseal, depending on the finish, the sealer and how much preparation the surface needs. So a 45 square metre driveway is around 540 to 1,125 dollars. If the old sealer has failed badly and has to be stripped and ground back first, add 15 to 30 dollars per square metre. That is why the three-to-five-year cycle is worth keeping: a reseal on schedule is a small job, and a reseal five years late is a restoration.
A worked example, a 45m² exposed-aggregate driveway at Parkhurst poured in 2020 and never touched since. Water no longer beads, the pebbles look grey and dusty, and there is a milky patch where the old sealer has broken down. Strip and grind the failed sealer at $20 per m² is $900. Clean and reseal at $18 per m² is $810. Total about $1,710. Had it been resealed on schedule in 2024 it would have been a straight $810 job with no stripping. Six years of doing nothing cost about $900, which works out at $150 a year to skip a job that takes an afternoon.
For context against a new pour: exposed aggregate is $130 to $200 per m² and coloured or stencil concrete $120 to $190 per m² in 2026, so a reseal is somewhere around a tenth of replacement. Full rates on the cost guide.
Resealing across the region.
Sealing and upkeep questions.
How often should concrete be resealed in Rockhampton?
Every three to five years for decorative concrete, and closer to every two to three years for anything in full sun or within sight of the water at Yeppoon. The Central Queensland UV load is the reason. A sealer that would last seven years in Hobart is being cooked here from 6am, and once it goes chalky or milky it has already stopped protecting the surface. The simple field test is to flick water on it: if it beads, the sealer is alive. If it soaks straight in and darkens the concrete, it is done.
Do I really need to seal a plain concrete driveway?
No, and we will tell you that honestly. Plain grey concrete does not need a sealer to survive. It will last decades unsealed. Sealing plain concrete is a choice about appearance and stain resistance: it keeps oil, tyre marks and red Central Queensland dust from soaking in, and it darkens the colour slightly. Where a sealer is genuinely worth the money is on exposed aggregate and coloured concrete, because there the sealer is protecting the finish you paid extra for, not the concrete underneath.
How do I clean concrete without wrecking it?
Hose it, use a stiff broom and a pH-neutral cleaner, and keep the pressure washer sensible. A 15 or 25 degree fan tip held well back is fine. A zero degree turbo nozzle jammed against the surface will strip the sealer, cut lines into the paste and, on exposed aggregate, blow the stones loose. Never use hydrochloric or brick acid on decorative concrete, because it eats the cement paste, dulls the colour permanently and strips the sealer in one pass. For mould and lichen on a shaded south side, a diluted household bleach solution left to dwell then rinsed does more than pressure ever will.
What does resealing cost in Rockhampton?
In 2026, expect roughly 12 to 25 dollars per square metre for a clean and reseal, depending on the finish, the sealer and how much preparation the surface needs. So a 45 square metre driveway is around 540 to 1,125 dollars. If the old sealer has failed badly and has to be stripped and ground back first, add 15 to 30 dollars per square metre. That is why the three-to-five-year cycle is worth keeping: a reseal on schedule is a small job, and a reseal five years late is a restoration.
How do I get oil or rust stains out of concrete?
Act fast and match the treatment to the stain. Fresh oil comes up with cat litter or a dry absorbent left overnight, then a degreaser and a stiff broom. Old oil that has soaked in needs a poultice, meaning a degreaser mixed to a paste, spread on, covered and left to draw the oil out over a day. Rust from steel furniture or the reo of a nearby fence needs an oxalic acid based rust remover, not a general acid. On sealed concrete you have far more time, because the stain sits on the sealer rather than in the concrete, which is the single best argument for keeping the seal current.
Driveway looking chalky? Do the water test.
If it soaks in instead of beading, send us a photo. We will quote a clean and reseal, or tell you it can wait.