Tarmac Restorer: What It Does and When It Is Worth Using
Updated: 3 days ago
Roll a tarmac restorer onto a faded, greyed drive and it will bring the black back and leave a light protective film. It works well on a drive that is sound but tired looking. It does nothing for cracks, potholes, sinking or crumbling edges, and on a drive with those problems it only paints over them for a season.
Why does tarmac go grey?
Newly laid tarmac driveways are black because every stone is coated in bitumen. Over the years, sunlight and rain oxidise the bitumen on the surface and traffic wears it off the tops of the stones. What you see is more exposed aggregate and a dull grey film. The bitumen deeper in the layer is usually still doing its job.
That is why a grey drive is not automatically a failing drive. If it is level, holds no water and has no loose stone, the change is largely cosmetic. Loose grit on the surface, small stones coming away in the wheel tracks or hairline crazing tell a different story: the surface course itself is starting to break down.
Restorer vs sealer: is there a difference?
The names are used loosely, and many products are sold as both. In practice there are two common types:
Acrylic or polymer coatings. Water based and pigmented black. One manufacturer's data sheet quotes two coats, coverage of around 4-6m² per litre depending on how porous the surface is, and 4-6 hours before it can be walked or driven on.
Bitumen based sealers. Water based bitumen emulsions that put a thin film of bitumen back onto the surface. They sit closer to what the tarmac is made of, and some contractors prefer them for older, more open surfaces.
Neither is a structural product. Neither adds thickness, fills ruts or stops a weak sub-base moving. Whether you can paint tarmac a different colour is a separate question; restorers are about getting back to black.
When is a tarmac restorer worth using?
A restorer suits a drive that ticks these boxes:
The surface is level, with no dips, ruts or sunken areas.
There are no open cracks wider than a hairline and no potholes.
The edges are firm and held by kerbs or edging.
Water runs off rather than sitting in puddles.
Stones are not coming loose when you scuff the surface with a shoe.
If your drive passes, a restorer can make a real difference to how it looks, and the film helps resist oil spots and weathering for a while. If it fails on any of these points, deal with that first, because any tarmac repair has to be done before a coating goes on.
How to apply tarmac restorer
Pick the weather. Most products need an air temperature of at least 5°C, a dry surface and no rain forecast until the coating has cured. Late spring and summer are easiest.
Clean properly. Sweep, then wash off dirt, moss and algae. Treat oil stains with a degreaser first; restorers do not stick to oil.
Let it dry fully. A damp surface is the main reason coatings peel.
Repair defects first. Fill potholes and seal cracks before coating, or the coating will simply crack along the same lines.
Cut in the edges. Brush along kerbs, walls and doorsteps first so the roller does not splash them.
Apply thin coats. Roll or brush in thin, even coats, working away from the house so you do not trap yourself. Most products call for two coats a few hours apart.
Keep off it. Stay off for the time on the tin and keep cars off for longer if the weather is cool.
Professional resealing is also an option. One UK cost guide puts professional tarmac resealing at roughly £8-£12 per m²; as always, the real figure depends on size, access and how much cleaning and repair the surface needs first.
What can go wrong?
The common problems are all preparation or weather. Coatings put on a dirty or damp drive peel in sheets. Thick coats stay soft and track onto shoes and tyres. Coatings put on just before rain can wash off in streaks. A glossy coat on a sloping drive can also be slippery when wet until it has worn in, so check the product is suitable for vehicles and slopes.
The bigger risk is cosmetic cover for a structural problem. A restorer on a drive with soft spots looks good for a few months, then cracks along the same lines, often with fresh potholes where water has kept getting in.
When restoring is masking a failing driveway
A tarmac drive is only as good as what is under it. A typical domestic build has a compacted sub-base of at least 100mm with a binder course of around 50mm and a surface course on top, and those depths (covered in how thick tarmac should be on a driveway) are what a coating cannot add.
If your drive was laid thin, or straight onto soil with no proper base, it will rut, crack and break up however often it is coated. At that point the choice is a resurface over a sound base or digging out and starting again. When we relay a drive we build it from the ground up, and every drive we lay comes with a 10-year guarantee.
Tarmac sealer questions, answered
How often should you reseal a tarmac drive?
There is no fixed rule. Reseal when the surface has visibly greyed again and the coating has worn through in the wheel tracks. Over-coating a drive that is still black just builds up layers that can peel.
Can you use tarmac restorer on concrete or block paving?
No. Tarmac restorers are made for bitumen surfaces. Concrete drives, including pattern imprinted concrete, use their own sealers; our pattern imprinted concrete driveways are resealed with a concrete sealer, not a tarmac product.
Will restorer fill cracks?
No. It may hide hairline marks for a while, but any crack you can get a coin into needs filling with a crack sealer first.
Faded, or failing?
If you are not sure which you are looking at, we can tell you in a short visit. Pete and the team cover Wolverhampton, the Black Country and south Staffordshire, and if a coat of restorer is all your drive needs, we will say so when you ask for a free quote.
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