Guide
Anti-mould paint in Spain: what to actually ask for
You are being served a shopping list you cannot buy from. This page gives you the Spanish product categories instead, the words to use at the counter, and an honest account of what paint can and cannot do to a damp wall.
Where it usually appears
What you can check yourself
When to contact us
You can write in English — we reply in English. We usually reply quickly. If we are on a job, it may take up to 2–3 hours.
Ask for a property, not a product name
In a Spanish paint shop the first question is not which paint you want, but what kind of damp you have: condensación, filtración (a leak, the façade, a neighbour) or capilaridad (rising from the ground). Almost every product decision follows from that answer — and none of these products fixes the source. They only change how the wall behaves once it is dealt with.
The label you are searching for also means less than you think. Pintura antihumedad is a commercial umbrella term, not a technical class: Spanish trade sources say so outright, and at least three different things are sold under it — emulsions with a fungicide added, breathable finishes, or both. Ask for the property you need, and for the sheet that proves it.
Why the English results send you shopping in the wrong country
English-language results often surface UK ranges, retailers and product names that do not map neatly to what is sold in Spain. Availability also changes, so a remembered brand is a poor specification.
Start with the Spanish category and the actual data sheet. Two products with similar marketing names may differ in intended use, compatible substrates and preparation; the local ficha técnica is more useful than a cross-market brand comparison.
What each Spanish category actually does
| Spanish term | What it genuinely is | Where it fails |
|---|---|---|
| pintura antimoho | coating marketed for resistance to mould growth; check the label and sheet | expected to treat existing mould or the moisture source |
| pintura anticondensación | coating marketed to change surface thermal behaviour | expected to replace insulation or ventilation; performance depends on the specified system |
| pintura transpirable | low resistance to vapour leaving the wall | expected to stop water arriving |
| pintura al silicato / a la cal | mineral coatings that bond into the wall, not over it | wrong substrate; over sound plastic paint |
| imprimación / fijador / selladora | primer / consolidant / pore sealer | used on a wet or salty wall |
| mortero de saneamiento | renovation render, EN 998-1 class R: stores salts in its own pores | sold as a rising-damp cure |
| impermeabilizante | coating or system intended to resist liquid water | used without checking the source, substrate or product’s pressure rating |
| hidrófugo | water-repellent treatment intended to limit absorption | assumed to bridge cracks or suit every substrate |
Impermeabilizante and hidrófugo are constantly confused, and are opposites where it matters: one seals, the other repels while letting the wall breathe. Say sellador and you will be handed a primer — for a joint sealant ask for masilla de sellado.
What “antimoho” legally means on a Spanish tin
Under the EU Biocidal Products Regulation (528/2012), PT7 covers film preservatives used to protect the initial properties of coatings against microbial deterioration. That describes preservation of the coating; it is not a claim that the finished paint removes existing growth or repairs the moisture source.
A PT7 preservative is intended to protect the coating film; it does not remove existing growth or change the humidity or cold surface behind it. Where the coating is a treated article, Article 58(5) gives consumers a right to request information about its biocidal treatment from the supplier, free of charge, within 45 days.
No percentages appear on this page: international guidance on damp sets no quantitative threshold, framing the answer around preventing persistent damp rather than coatings. This is general information, not legal, financial or insurance advice, and NoMoho provides none of those.
How to read a ficha técnica
The ficha técnica is the technical data sheet, usually a free PDF on the maker’s site. Ask for it: a shop that cannot produce one cannot substantiate its advice.
| Field | English | Why it matters |
|---|---|---|
| uso previsto / soportes | intended use / substrates | whether the product is designed for this wall |
| permeabilidad al vapor / Sd | vapour permeability | one part of how the dried film behaves |
| rendimiento y capas | coverage and coats | how the specified system must be applied |
| preparación del soporte | substrate preparation | what must be true before coating |
Read the whole sheet, not one adjective or number. An Sd value can help describe vapour resistance, but it does not establish that a coating suits a particular substrate or moisture source. Intended use, compatible backgrounds and preparation requirements matter just as much.
Follow the specified system. Coverage, number of coats, drying between coats and application conditions vary by product. Do not turn one manufacturer’s thickness, temperature or curing instructions into a universal rule.
Read preparación del soporte first. The sheet should state which backgrounds are accepted, what must be removed or repaired, and the conditions required for application. If the support is damp, salty, friable or still receiving water, product selection needs a competent substrate assessment rather than a counter shortcut.
The expensive mistake: sealing a wall that is still wet
The intuitive purchase is a waterproofer on the inside face of a damp wall. Applied before the source and substrate are understood, an impermeable film can trap or displace moisture rather than resolve it. Depending on the wall and the route the water takes, the result may be blistering, flaking or a softened surface behind the coating.
Older Barcelona walls may include lime plaster, soft masonry, salts or several incompatible layers from earlier renovations. A vapour-tight coating can be unsuitable on some of those supports, but there is no single finish that is right for every old wall. The moisture source, material condition and existing layers should determine whether the wall needs drying, repair, a compatible coating system or another trade first.
What has to be true about the wall first
- The source is identified and dealt with — a leak fixed, or shower and cooking vapour actually extracted.
- Existing growth is removed, not painted over. If it keeps returning, read why mould comes back after cleaning first.
- The surface is clean, dry and free of loose material, dust, grease and untreated salitre. The appropriate preparation depends on the substrate and the product sheet; do not improvise chemical treatment from generic advice.
- Chalky or flaking coatings are removed to a sound background. Curing times, repair depth and treatment of salt-affected or rising-damp walls are case- and product-specific, and may require another trade before painting.
- Compatibility with what is already on the wall has been tested, not assumed.
Where to buy, and the Spanish to use
DIY chains — Leroy Merlin, Brico Depôt, BAUHAUS — carry consumer ranges and generalist staff. Obramat confuses newcomers: it is the former Bricomart, renamed in November 2022, and trade-facing, so renovation renders and lime systems are likelier there. The channel worth knowing is the paint specialist: a tienda de pinturas, or a droguería — a paint and household-chemicals shop, not a pharmacy. A hypermarket aisle is convenience only; assume no data sheet.
At the counter:
- “Todavía no sé si es condensación, filtración o capilaridad.”
- “¿Me puede dar la ficha técnica y confirmar si sirve para este soporte?”
- “¿Esta pintura lleva conservante para la película, o es un tratamiento para el moho?”
More of this vocabulary sits in the English–Spanish damp and mould glossary.
Where paint fits, and where we do
Paint is a finish. On a dry, stable and compatible prepared surface, after the relevant moisture source has been dealt with, it protects the coating and restores the appearance. Over an unresolved source it is likely to fail; on an old or salt-affected wall, compatibility must be assessed rather than assumed. That is why anti-mould painting in Barcelona is the last step of our work, not the first, and why we name no brands and quote no lifespans.
If the wall itself is damaged, damp wall repair comes first; if marks are seasonal, start with how condensation mould behaves in Barcelona flats. We do not do waterproofing, building work, leak repair, injection against rising damp or ventilation installation. Send a wide shot, a close-up and a line of context on WhatsApp, in English, and someone will say whether paint is even the right conversation.