Description
At 0.02 L of concentrate per m² and a maximum 1:5 dilution, Atlas Mykos Plus 5L is a biocide-authorised fungicide and algaecide concentrate that eliminates algae, mould, lichen and biological corrosion from facades, render systems and EWI installations across UK climate exposure.
Where Atlas Mykos Plus Performs Best — UK Facade Biological Cleaning
Atlas Mykos Plus is a concentrated dual-active biocide, authorised under registration No 7371/18, with a documented biocidal effect against algae and mould fungi at a minimum 150 g/m² of prepared solution. It penetrates a few millimetres into absorbable mineral substrates, working within the material structure rather than only across the surface.
That depth of action is what separates it from a surface wash. The product belongs in the Renders World cleaning products range as the biocidal option for organic contamination, and it earns that place because surface-only cleaners strip visible growth while leaving embedded mycelium and spore reserves intact to recolonise. Mykos Plus reaches into the substrate where biological corrosion takes hold, which is why the manufacturer specifies three applications at 12–24 hour intervals on heavily contaminated facades — the protocol that breaks the regrowth cycle rather than postponing it.
Why Specifiers Choose Atlas Mykos Plus
- Biocide authorisation No 7371/18: registered active chemistry with documented effect against algae, mould, lichen and basidiomycete fungi.
- Concentrated, dilutable to 1:5: a 5 L pack covers a substantial facade area at the 0.02 L/m² consumption rate per application, which is why Renders World stocks it as the single biocidal consumable for the range.
- Penetrates a few millimetres into mineral substrates: reaching embedded growth in render, concrete and stone, not only visible surface contamination.
- Approved for render and EWI systems: works on facades with or without thermal insulation, including silicone render finishes, concrete and limestone, preserving substrate appearance when applied per protocol.
- Preventive residual action: protecting treated surfaces against secondary biological corrosion, extending the cleaning interval well beyond a non-residual cleaner.
Technical Specifications — Atlas Mykos Plus Data
| Specification | Value |
|---|---|
| Product type | Concentrated fungicide and algaecide (biocide) |
| Active substances | Alkyl (C12–C16)-dimethylbenzylamine 2.40 g/100g · 2-octyl-2H-isothiazol-3-one 0.24 g/100g |
| Biocide authorisation | No 7371/18 |
| Dilution | Up to 1:5 with water — severity dependent |
| Consumption | 0.02 L concentrate per m² per single application |
| Contact time | 6–12 h minimum; 12–24 h between passes |
| Re-coat / finish | Minimum 48 h after final application |
| Pack size | 5 L plastic container |
| Storage | +10°C to +30°C, protect from frost; 24-month shelf life |
| Manufacturer | Atlas (Poland) |
These values are confirmed against the Atlas Technical Data Sheet for Mykos Plus. The 0.02 L/m² consumption figure is the one that governs ordering: at 1:5 dilution a 5 L pack treats roughly 250 m² per single application, so a single container covers substantial residential elevation work even across the three-pass protocol.
Where Atlas Mykos Plus Applies — Substrates and Growth Types
Mykos Plus works on mineral and ceramic substrates: building facades with or without thermal insulation, render systems, concrete, cement and cement-lime plasters, brick and block walls, terraces and basements. It is not formulated for timber surfaces or indoor wet rooms such as bathrooms, laundries and pool halls, where the manufacturer specifies Atlas Mykos No. 1 instead.
Biological growth it eliminates
The dual-active chemistry targets a broad spectrum: algae and lichens on weathered facades, basidiomycete fungi, and moulds including Aspergillus niger, Penicillium funiculosum, Scopulariopsis brevicaulis and Trichoderma viride. For distinguishing the common UK render-staining types before treatment, the red algae versus green algae diagnosis guide sets out the visual differences.
When this is not the right cleaner
Biological growth is one staining type; mineral staining is the other. Cement, lime and gypsum residues, efflorescence and limescale call for acid chemistry, and for those deposits the Atlas Cement Away SZOP is the correct choice. The diagnostic step is what saves product, and the efflorescence and white-stains guide covers how to tell mineral staining from biological growth at a glance.
How to Use Atlas Mykos Plus — The Three-Pass Protocol
For the cleanest result on heavy contamination, follow the manufacturer's three-pass protocol. Locate and resolve the source of damp first, because biological growth without underlying moisture is rare and treating the surface alone produces a short-lived result. Pre-clean mechanically or with a pressure washer to lift loose contamination, then apply the diluted product profusely until the surface is fully moist.
Allow 6–12 hours minimum contact per pass, with 12–24 hour breaks between applications. Three passes address fungi at different growth stages: vegetative mycelium and germinating spores respond quickly, while resistant spore forms such as conidia need repeat exposure. Cutting the protocol short on heavy contamination is the most common reason for visible regrowth within a season.
Leave a minimum of 48 hours after the final pass before any refinishing, so the substrate is fully ready to accept the new coating.
Application Notes — Damp Source, Safety, Finishing
The most productive step happens before the cleaner comes out: diagnosing and fixing the moisture source. Render that grows algae again within twelve months is almost always render on a wall with unresolved damp — failed flashing, blocked weep paths, leaking gutters, or insufficient roof overhang. The cleaning works; the conditions return. Resolving the source first is what makes the result hold.
The concentrate contains active biocides with skin and eye irritation risk and potential allergenic effect, so protective gloves, eye protection and adequate ventilation are essential. The product is very toxic to aquatic life, which makes runoff control and proper waste disposal part of the job rather than an afterthought. Following the label and safety data sheet protects both the operator and the surrounding environment.
For refinishing, the manufacturer recommends silicone or silicate systems over the treated substrate, since these reduce absorption and limit the damp conditions that allow recolonisation. A maintained silicone render finish over a properly disinfected wall is the combination that keeps facades clean across successive damp seasons.
Pro Tips From UK Renderers Using Atlas Mykos Plus
Experienced applicators treat the residual preventive effect, not the immediate clean, as the reason to specify a biocide-authorised product over a generic wash.
- I fix the damp source first: failed flashing or blocked weeps return the growth within a season regardless of how well the surface cleans.
- I commit to all three passes on heavy growth: resistant spore forms survive a single application and re-establish from the substrate.
- I apply until the surface is fully moist: profuse application lets the chemistry penetrate the few millimetres where embedded growth lives.
- I respect the 48-hour cure before refinishing: rushing the new coating traps residual moisture and undermines the treatment.
- I control runoff: the product is very toxic to aquatic life, so containment is standard practice, not an optional extra.
Is Atlas Mykos Plus Right for Your Project?
The product addresses biological contamination on mineral and ceramic substrates with residual protection. The points below confirm where it fits and where another option serves better.
- Algae, mould, lichen or fungal growth on facades, render or EWI: a strong fit — the dual-active chemistry clears biological growth and leaves residual protection against recolonisation.
- Cement, lime, gypsum or efflorescence residues: use the Atlas Cement Away SZOP acid cleaner instead, since mineral deposits need acid rather than biocidal chemistry.
- Resin or polymer-dispersion residues: the Resin Away SZOP 2000 alkaline cleaner handles polymer-based contamination.
- Pre-refinishing disinfection: apply before repainting or re-rendering an affected elevation so the new finish goes onto a disinfected substrate, breaking the recolonisation cycle.
- Not the right fit: indoor wet rooms (use Mykos No. 1), timber surfaces, mineral staining without biological growth, or projects where the underlying damp source remains unresolved.
Order the 5 L pack as part of a facade restoration or pre-refinishing programme. The Renders World technical desk can advise on dilution, coverage and substrate compatibility for specific finishes.
FAQ — Atlas Mykos Plus Use, Compatibility, Storage
How much surface area does a 5 L pack typically treat?
At the recommended 0.02 L/m² consumption rate per application, a 5 L pack of concentrate covers roughly 250 m² per single pass before dilution. With 1:5 dilution and the three-pass protocol on heavy contamination, a single 5 L pack handles substantial residential elevation work across the full treatment cycle.
Can the product be used on EWI render finishes?
Yes — it is explicitly approved for facades with thermal insulation, including render finishes over EPS, mineral wool and similar EWI build-ups. The penetrating action reaches embedded growth without damaging the render when applied per the dilution and contact-time protocol. A sample application on a discreet area is sensible on any unfamiliar substrate.
How does this compare to Atlas Cement Away for render cleaning?
The two address opposite staining types. Mykos Plus is a biocide for biological growth such as algae, mould and lichen. The Atlas Cement Away SZOP is an acid cleaner for mineral residues such as cement, lime and efflorescence. Diagnosing the staining type first determines which product applies, because the wrong chemistry leaves the original problem untouched.
How long after application can the surface be repainted or rendered?
Allow a minimum of 48 hours after the final application before any finishing — paints, renders or ceramic tiles. The manufacturer recommends silicone or silicate finishes over the treated substrate, since these reduce absorption and limit the conditions that allow biological recolonisation.
Why does the manufacturer recommend three applications rather than one?
Biological contamination holds organisms at different growth stages. Vegetative mycelium and germinating spores respond to a single pass, but conidia and other resistant spore forms survive and re-establish from the substrate within months. The three-pass protocol at 12–24 hour intervals targets each stage in turn, which is what breaks the recolonisation cycle.
What safety precautions are required when handling the product?
The concentrate contains active biocides with skin and eye irritation risk and potential allergenic effect, so protective gloves, eye protection and adequate ventilation are essential. It is very toxic to aquatic life, which makes runoff control and correct waste disposal part of the work. Following the guidance on the label and safety data sheet protects the operator and the environment alike.
Technical Documentation — Atlas Mykos Plus TDS