Stamped concrete restoration and resealing in Mallorca

Stamped concrete is a concrete surface with colour and texture on top, protected by a layer of sealer. The concrete lasts for decades. What ages is the top layer: the sealer, and with it the colour it protects. That is why repairing stamped concrete rarely means lifting it. It means cleaning, repairing what has broken, bringing back the colour and sealing again.

This page explains the four symptoms we see on terraces, driveways and pool areas across Mallorca, why they appear here sooner than elsewhere, what the treatment involves and how often the sealing should be repeated.

The four symptoms and what each one means

Colour faded by the sun

The pigment in stamped concrete sits in the top few millimetres, and the sealer is what gives it depth and protects it from ultraviolet radiation. When the sealer is spent, the colour looks washed out, greyish and flat, especially in full sun. The concrete is fine; it is only missing the layer that made it look good. This is the easiest symptom to resolve and the one that changes the appearance most.

White film or white patches

White or milky stamped concrete usually has one of two causes. The first is moisture trapped under an acrylic sealer: water rose from the sub-base or was left in the pores at sealing, and the sealer turned opaque. The second is efflorescence, salts from the concrete itself that come to the surface with water and crystallise. You can tell them apart because trapped moisture forms veils and clouds, while efflorescence forms a white powder that can be scraped off. Each is treated differently.

Sealer that peels or flakes

When the sealer lifts in flakes or sheets, it is almost always because it was applied too thickly, applied over a damp or dirty floor, or an incompatible product was put over the previous one. Before resealing, everything loose has to come off; a new coat over a sealer that is letting go will let go with it.

Cracks and broken edges

Fine shrinkage cracks, joints that have opened, and chipped edges and steps are damage to the concrete, not the sealer. They are repaired with mortar and resin, given back the texture of the mould and the colour, and then sealed with the rest. A crack that is growing, that has one side higher than the other or that runs across a whole slab is a different matter and is assessed separately at the visit.

Why it happens sooner in Mallorca

• Sun and UV. Many hours of sun a year and high summer radiation break down acrylic sealers faster than inland on the mainland. A south-facing terrace in Llucmajor or Calvià ages before one in shade.
• Salt air. Near the coast, from Andratx to Alcúdia, salt settles, dissolves in the dew and crystallises, attacking the sealer film.
• Torrential autumn rain. Water from the September and October storms gets in through cracks and joints, saturates the sub-base and comes back out through the pores, carrying salts with it.
• Pressure washing with the wrong nozzle. A pencil jet held a few centimetres away cuts the sealer and strips the colour from the surface. It is the most common cause of the striped marks we see on garage approaches.
• The wrong sealer, or badly applied. An interior product, a coat that is too thick or an application on a damp floor turns into white film or flaking within months.

The treatment, step by step

1. Controlled pressure cleaning. Pressure washing with a fan nozzle at a constant distance, to remove dirt, algae and loose sealer without damaging the surface. Where the old sealer is poorly bonded, we apply a stripper and remove it entirely. The floor is then left to dry.
2. Repair. Cracks, open joints, edges and chips are filled with repair mortar or resin according to their size, and the texture of the mould is pressed into them so they do not show.
3. Colour restoration. Where pigment has been lost, we apply a stain or pigmented sealer in the original tone, sampled on the floor itself. If you would rather change the colour, this is the moment.
4. Two coats of sealer. Two thin, cross applied coats of solvent-based acrylic, water-based acrylic or polyurethane, depending on exposure and use. On pool copings, steps and ramps we add anti-slip additive to the final coat.
5. Curing. 24 hours without foot traffic and 48 to 72 hours without vehicles, somewhat longer in cool or humid weather.

We avoid the middle of the day in summer and never work with rain forecast in the following 24 hours, because the sealer needs a dry floor and a moderate temperature to form a proper film.

How often resealing is needed

The trade talks about resealing stamped concrete every 2 to 4 years. In Mallorca, what moves the figure is exposure: a pool area in full sun with chlorine is closer to 2 years, a shaded finca track with little traffic can reach 4. The sign to act is when water stops beading on the surface and starts to darken it as it soaks in. Resealing on time is a thin coat over a sound floor; resealing late is a full restoration.

Maintenance plan for communities and villas

For residential communities, property administrators and managers of rental villas, we propose a written maintenance plan: an annual inspection of the surface, controlled pressure cleaning before the season, repair of small defects as they appear and resealing in the year each area is due, on dates agreed outside the occupancy season. The plan breaks the work into short, predictable visits and stops a community in Marratxí or a villa in Pollença reaching full restoration because two cycles were missed. Ask for a quote and we send a proposal fitted to your surfaces.

What cannot be fixed

We are straightforward at the visit. Stamped concrete that was badly built, too thin, without mesh or on a sub-base that has sunk can crack slab by slab, and there resealing solves nothing: the affected slab is cut out and poured again. Widespread loss of the colour layer, with aggregate showing over large areas, can be covered with a new imprinted overlay but cannot be recovered with sealer. And a floor that has been painted with plastic paint will need to be stripped completely before any treatment. If your case is one of these we tell you before quoting, and we point you to the option that does work, including new stamped concrete over the affected area.