A driveway is usually the first thing anyone sees when they pull up to your house, and the first thing to look neglected. Oil marks, moss along the edges, and that grey chalky fade concrete gets after a decade of Melbourne sun.
Cleaning and sealing fixes the look and buys the surface years of extra life. Here is how to get it right, including the bit most people skip.
1. Clean it properly first, because sealer locks in whatever is underneath
This is the step that decides whether the job lasts. Sealer does not lift stains or kill moss. It traps them, and a sealed in oil patch is far harder to deal with later.
A proper prep means high pressure cleaning the whole surface, pre treating oil and rust with a degreaser rather than blasting at them, and treating moss and lichen so the spores are killed rather than just knocked off. Moss that is only surface cleaned grows back through the sealer within a season.
If you do nothing else from this list, do this one. Most sealing jobs that fail early failed at the cleaning stage.
2. Match the sealer to the surface
Different driveways need different products.
Plain and coloured concrete takes either a penetrating sealer, which soaks in and leaves the look unchanged, or a topical acrylic, which sits on top and adds a wet look sheen. Penetrating lasts longer and is less slippery. Topical looks better on decorative concrete.
Exposed aggregate is usually sealed with a solvent based acrylic to bring out the stone colour. It needs redoing more often because the texture holds more wear.
Pavers want a penetrating sealer, and joint sand should be topped up before sealing.
Asphalt or bitumen uses a bitumen based emulsion, which is a completely different product to anything used on concrete.
Using the wrong product is not a small mistake. A topical acrylic over a damp slab will cloud and peel, and stripping it back is expensive.
3. Get the timing right for Melbourne conditions
Sealer needs a dry surface, dry weather while it cures, and temperatures that are neither too cold nor too hot.
Aim for spring or autumn. Consistent temperatures above 10 degrees, and a clear run of two or three dry days. Concrete needs to be properly dry underneath, not just dry on the surface, so allow a couple of days after rain before sealing.
Avoid the hottest summer afternoons. Sealer applied to a slab baking at 50 degrees flashes off too fast and can bubble or leave lap marks. Early morning is better in warm weather.
One thing worth clearing up: you will read overseas advice about freeze and thaw damage. That is not a Melbourne problem. What damages driveways here is UV, heat, oil, tree root movement and water sitting where drainage is poor.
4. Fix the cracks before you seal, not after
Sealer bridges nothing. A hairline crack sealed over is still a crack, and water still gets in.
Small cracks take a flexible concrete filler. Larger cracks and movement joints need proper attention, and if a section has lifted from tree roots, sealing it is cosmetic at best. Deal with the cause first or accept it will keep moving.
5. Do not over apply
More coats does not mean more protection. Two thin, even coats outperform one heavy one every time.
Excess sealer pools in low spots, stays tacky, picks up dirt and eventually goes cloudy. On smooth concrete it also becomes genuinely slippery when wet, which matters on a sloped driveway with kids around. A quality sealer applied thinly and evenly gives better coverage and a safer surface.
6. Know when to call someone in
A small flat concrete driveway in good condition is a reasonable weekend job if you hire a decent pressure washer and buy quality sealer.
Get help when the driveway is large, when it slopes, when there are stubborn oil or rust stains, when there is significant moss, or when it is exposed aggregate or pavers where the finish is less forgiving. Hire equipment is also usually underpowered compared with commercial gear, which shows up as streaking on wide surfaces.
The maths is simple. Redoing a failed DIY job costs more than having it done once.
7. Look after it afterwards
- Hose it down every few weeks so grit does not grind into the surface
- Clean up oil drips quickly rather than letting them soak in
- Keep leaf litter off, especially along shaded edges where moss starts
- Reseal every three to five years for concrete, more often for exposed aggregate or heavily trafficked surfaces
Signs it is due again: water stops beading and soaks straight in, colour looks flat and faded, or stains that used to wipe off now sit.
Frequently asked questions
How often should a driveway be sealed in Melbourne?
Every three to five years for concrete. Exposed aggregate and high traffic driveways sit at the shorter end of that range.
Does sealing remove oil stains?
No. Stains need pre treating and lifting before sealing. Sealer applied over an oil stain locks it in permanently.
What is the best time of year to seal a driveway?
Spring or autumn, with a few consecutive dry days and temperatures above 10 degrees.
Will sealing make my driveway slippery?
Topical sealers can be slippery when wet, particularly on smooth concrete. Penetrating sealers or an anti slip additive avoid this.
Can I seal a brand new driveway?
New concrete should cure for at least 28 days before sealing.
How long before I can drive on it?
Usually 24 hours for foot traffic and 48 to 72 hours for vehicles, depending on product and weather.
Get it cleaned and sealed properly
Silverline Roofing cleans and seals driveways across Melbourne’s western suburbs. Concrete, exposed aggregate and pavers, with the surface prepared properly before any sealer goes near it.
See our driveway cleaning service, or call 0403 131 908. We are often on site doing roof cleaning or gutter cleaning as well, so ask for a combined quote and get it all done in one visit.
