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Wykamol MCS1 Mould Clear Solution is a ready-to-use mould treatment supplied in a 500ml spray bottle, designed to eradicate and sterilise black mould growth on a variety of internal surfaces.
It is ideal for use on painted walls, ceilings, wallpaper, timber, and window reveals, and offers long-lasting protection when used with Wykamol MCS3 Paint Additive.
Carrying HSE Approval No. 9453, this pre-mixed formulation requires no dilution and is suitable for both residential and commercial use.
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✔️ Ready-to-use trigger spray formula provides fast and effective mould removal with no dilution required.
✔️ Penetrates and sterilises surfaces to kill mould spores at the root and prevent further growth.
✔️ Suitable for walls, ceilings, timber, and painted or wallpapered areas affected by condensation.
✔️ Works as part of the Wykamol MCS system for long-term mould protection of up to 5 years.
✔️ Safe for use in occupied properties, with low odour and rapid drying after application.
Wykamol MCS1 Mould Clear Solution is a highly effective, ready-to-use biocidal treatment formulated to combat surface mould caused by persistent condensation and high humidity. Designed for ease of use, it comes in a 500ml trigger spray bottle and requires no dilution, making it the ideal solution for immediate application in both domestic and professional settings. As the first step in Wykamol’s comprehensive Mould Control System (MCS), this treatment offers a practical yet powerful approach to eradicating mould at the source.
The formulation works by rapidly penetrating the affected surface to sterilise and kill active mould spores. Unlike conventional bleach-based products that merely discolour the surface, MCS1 Mould Clear Solution destroys mould at a microbial level, offering a thorough and reliable clean. It eliminates both visible contamination and hidden spores, significantly reducing the risk of regrowth and minimising associated health risks such as respiratory irritation and allergic reactions.
Wykamol MCS1 is suitable for use on a broad spectrum of indoor surfaces, including walls, ceilings, skirting boards, painted finishes, and wallpapered areas. Its compatibility with timber features and window reveals makes it a versatile option for treating mould in areas most vulnerable to condensation. Whether applied to small isolated spots or used as a preparatory treatment before larger-scale redecoration, this mould killer ensures optimal surface hygiene and aesthetic restoration.
When used in conjunction with Wykamol MCS3 Mould-Resistant Paint Additive, MCS1 forms part of a durable system that offers protection against mould reoccurrence for up to five years. This makes it ideal not only for emergency remedial treatment but also for long-term maintenance programmes in residential and commercial properties. It is particularly effective in kitchens, bathrooms, basements, and other high-moisture areas that are prone to ongoing condensation issues.
Formulated with safety and user convenience in mind, Wykamol MCS1 Mould Clear Solution is low in odour and dries quickly, making it suitable for use in occupied properties. It complies fully with UK safety regulations and carries HSE Approval No. 9453, giving users confidence in its reliability and professional standard of performance. The quick-drying nature of the product allows for swift re-entry into treated areas, ensuring minimal disruption to everyday activities.
As part of the trusted Wykamol MCS range, MCS1 Mould Clear Solution delivers proven results in the treatment and prevention of condensation-related mould. Its combination of ease of use, immediate effectiveness, and compatibility with long-term protective solutions makes it a vital tool for anyone looking to maintain a healthier, mould-free indoor environment.
MCS1 Mould Clear Solution carries the HSE Approval No 9453.
Ready-to-Use Convenience: Supplied in a pre-mixed 500ml spray bottle, MCS1 Mould Clear Solution requires no dilution, reducing preparation time and minimising application errors. It is ready to use straight from the bottle, making it suitable for rapid treatment.
Effective Mould Eradication: Formulated to kill black mould spores on contact, the solution sterilises the surface thoroughly rather than simply bleaching visible mould. This ensures a more comprehensive treatment that helps eliminate both surface and underlying fungal activity.
Long-Lasting Results: When used alongside Wykamol MCS3 Paint Additive, the treated surfaces are protected from future mould growth for up to five years, offering lasting peace of mind in areas prone to condensation or poor ventilation.
Safe for a Wide Range of Surfaces: Suitable for use on painted walls, wallpaper, timber surfaces, window frames, doors, and ceilings. Its gentle formula does not damage decorative finishes when applied as directed, making it versatile for household or commercial use.
HSE Approved: Carries HSE Approval No. 9453, confirming that it meets stringent UK standards for biocidal efficacy and safety, ensuring it is suitable for use in homes, public buildings, and commercial premises.
Quick and Efficient: Begins to work within 30 minutes of application, delivering fast visible results and saving time on site. For severe infestations, reapplication can be performed after a short interval.
Domestic Properties: Ideal for use in homes experiencing condensation-related mould issues, especially in high-humidity areas like bathrooms, kitchens, and bedrooms. Effectively restores clean conditions on painted and papered walls and ceilings.
Commercial Buildings: Suitable for treatment of mould in offices, schools, healthcare settings, and rental properties. Provides a professional-grade solution for facilities management teams addressing hygiene and aesthetics.
Pre-Redecoration Preparation: Frequently used as part of pre-decorating processes in mould-affected spaces. It ensures mould is killed and removed prior to painting or wallpapering, helping to prevent recurrence beneath the new finish.
Window Reveals and Timberwork: Perfect for targeting mould on timber components such as skirting boards, door frames, and window surrounds where moisture accumulation is common. Its compatibility with wood makes it useful for heritage and decorative features.
Mould Control Systems: An essential component of the Wykamol Mould Control System. Recommended for use with Wykamol MCS3 Paint Additive to maximise long-term resistance and create a complete mould prevention solution.
Benzalkonium Chloride is a quaternary ammonium compound (QAC) that serves as a potent biocidal agent in Wykamol MCS1 Mould Clear Solution. At a ready-to-use concentration of 0.95% w/w, it delivers broad-spectrum antimicrobial efficacy against a wide range of bacteria, fungi, moulds, and algae. Its primary mode of action involves the disruption of microbial cell membranes. By targeting the lipid bilayer of the cell membrane, Benzalkonium Chloride causes leakage of cellular contents and ultimately cell death. This surfactant-based compound also aids in loosening and removing organic deposits from surfaces, enhancing both the cleaning and sanitising process. Particularly effective on non-porous surfaces, it is well-suited for environments with persistent dampness or condensation—conditions in which surface moulds and biofilms typically flourish. Its low toxicity, low volatility, and compatibility with indoor applications make it a preferred biocide in mould control formulations, ensuring safe and sustained surface sanitisation when used as directed.
2-Phenylphenol, also known as ortho-phenylphenol, is a highly effective phenolic compound with powerful fungicidal properties. In Wykamol MCS1 Mould Clear Solution, it is included at a ready-to-use strength of 0.24% w/w, where it plays a vital role in targeting and neutralising fungal spores, especially those responsible for mould and mildew growth. It acts by penetrating fungal cell walls and disrupting enzymatic processes critical to energy production and cellular repair, thereby halting spore viability and fungal proliferation. Unlike many traditional fungicides, 2-Phenylphenol remains active on surfaces for prolonged periods, offering residual protection that inhibits regrowth after the initial application. Its chemical stability under normal environmental conditions also makes it reliable in both warm and humid climates where fungal activity is typically more aggressive. In addition to its biocidal effect, it works synergistically with other agents to enhance the longevity and effectiveness of mould control treatments.
Together, Benzalkonium Chloride and 2-Phenylphenol create a highly effective dual-action system within Wykamol MCS1 Mould Clear Solution, addressing both immediate microbial removal and long-term mould prevention. Benzalkonium Chloride quickly destroys a broad range of microorganisms on contact and helps lift organic matter from surfaces, while 2-Phenylphenol delivers targeted antifungal activity with extended residual protection. The combined biocidal spectrum ensures comprehensive eradication of visible mould, mildew, and their spores, reducing the risk of recurrence in problem areas. Their chemical compatibility enhances overall performance, making the solution highly effective in damp, poorly ventilated spaces such as bathrooms, kitchens, basements, and external masonry. This synergistic formulation allows MCS1 to serve as both a cleaner and a protectant, offering professional-grade mould remediation in a ready-to-use format.
When handling and applying Wykamol MCS1 Mould Clear Solution, standard site hygiene measures must be observed at all times.
Personal protective equipment, including gloves, goggles and a suitable face mask, should be worn to minimise contact with skin and eyes, and to prevent inhalation of airborne spores. Always work in a well-ventilated environment, and ensure the product is kept away from food, drink and animal feeding areas.
The label and Material Safety Data Sheet should be consulted prior to use. Treated areas should be kept inaccessible to children and pets until surfaces are dry.
Wykamol MCS1 Mould Clear Solution is suitable for a range of internal surfaces that are affected by condensation-related mould. These include painted and papered walls, ceilings, window reveals, timber skirting boards, door frames, and other hard surfaces within the property.
The product can also be applied to plaster surfaces once paper or loose coatings have been removed. It is not intended for use on unsealed or absorbent decorative finishes where staining may occur. Prior to use, always test on a small inconspicuous area and allow to dry to confirm suitability and appearance.
To ensure the most effective treatment, do not disturb or remove affected wallpaper, flaking paint, or visible mould before spraying the solution.
Premature disturbance may release mould spores into the surrounding air, increasing the risk of spreading contamination. Surfaces should be dry and free from heavy dust, grease, or debris.
Do not use MCS1 on damp walls where liquid may not be absorbed effectively. On papered walls, retain the paper in place during initial application so that spores are immobilised before stripping.
Shake the container well before use. Apply MCS1 Mould Clear Solution directly to the affected surface using the spray nozzle provided, holding the bottle approximately 3 to 5 centimetres from the wall.
It is important to treat not only the visibly moulded area but also to extend application by approximately one metre beyond the affected region. For painted or timber surfaces, apply a liberal, even coat.
For wallpapered areas, spray the paper thoroughly and allow it to act as both a biocide and a stripping aid. Once the paper has softened and detached, bag it carefully and remove it from the property to prevent cross-contamination. Spray the now-exposed plasterwork with another liberal coat to ensure deep sterilisation.
After drying, scrape off any loose paint or surface debris. Previously painted substrates should be etched lightly with sandpaper before finishing. All removed materials should be disposed of responsibly.
Each 500ml bottle of MCS1 Mould Clear Solution will cover approximately 6.25m² depending on the porosity and condition of the surface.
If larger areas require treatment, consider using Wykamol MCS1 Mould Clear Concentrate 5X, which can be diluted to produce up to 25 litres of working solution.
The solution begins working within 30 minutes of application. After this time, the surface can be gently cleaned with a sponge and warm soapy water. Once rinsed, allow the substrate to dry thoroughly until touch dry before any finishing or redecoration is carried out.
Once the treated surface is fully dry and prepped, you may proceed with decorating. For long-lasting resistance to mould, Wykamol recommends the use of MCS3 Paint Additive mixed with the final paint coat to ensure protection against mould reoccurrence for up to 5 years. Breathable paints are ideal in areas with known condensation issues.
Sponges or cloths used in the cleaning process should be saturated with MCS1 Solution before use and thoroughly rinsed afterwards until the water runs clear. Used cleaning materials should be disposed of or disinfected to avoid spreading spores to other areas.
Store the product in a cool, dry place away from direct sunlight. Keep container tightly sealed when not in use and do not allow it to freeze. This product carries HSE Approval No. 9453, ensuring compliance with biocidal safety regulations in the UK.
A) Wykamol MCS1 Mould Clear Solution is specifically formulated to kill and sterilise black mould growth on a wide variety of interior surfaces affected by condensation and humidity. It is most commonly used on walls, ceilings, timberwork, and wallpapered areas where visible or hidden mould may be present. As part of the Wykamol Mould Control System, it serves as the essential first step in treating mould-prone areas, eliminating surface and embedded spores before any decoration or repair takes place. Its biocidal action ensures that mould is eradicated at its root, preventing regrowth and improving hygiene and air quality in domestic and commercial settings.
A) Wykamol MCS1 Mould Clear Solution is a ready-to-use product, supplied pre-mixed in a convenient 500ml trigger spray bottle. It requires no dilution or preparation, which makes it ideal for fast, on-the-spot application. This ease of use is particularly helpful for homeowners or maintenance professionals needing to respond quickly to localised mould outbreaks without the additional steps of mixing or measuring. The formulation is stable, effective, and safe to use straight from the bottle, eliminating the risk of incorrect dilution ratios and ensuring consistent biocidal performance.
A) Wykamol MCS1 Mould Clear Solution is designed for use on a wide range of hard interior surfaces affected by condensation-related mould. These include painted walls and ceilings, wallpapered areas, window reveals, door frames, skirting boards, and sealed timber surfaces. It can also be used on plaster after wallpaper has been removed, provided the substrate is dry and sound. It is not suitable for unsealed or highly porous decorative finishes, nor should it be used on fabrics or external surfaces. A patch test is recommended in inconspicuous areas to confirm suitability before full application.
A) Wykamol MCS1 Mould Clear Solution contains a powerful combination of biocidal agents—Benzalkonium Chloride and 2-Phenylphenol—which target the cellular structure of mould and fungal spores. Benzalkonium Chloride disrupts the membrane of microorganisms, causing rapid cell death, while 2-Phenylphenol penetrates deeper to interfere with enzymatic activity and prevent fungal reproduction. This dual-action mechanism allows the solution to not only kill visible mould but also neutralise any residual spores, offering a more comprehensive approach than bleach-based alternatives. Its ability to sterilise the surface at a microbial level significantly reduces the likelihood of mould regrowth.
A) Before using Wykamol MCS1 Mould Clear Solution, it is essential not to disturb or remove any wallpaper or flaking paint in mould-affected areas. Premature removal can release mould spores into the air, risking cross-contamination. Ensure the surface is dry and free from grease, dust, or loose debris. On wallpapered surfaces, leave the wallpaper intact during initial spraying to allow the solution to penetrate and immobilise mould spores before stripping. Only after the solution has acted should any wallpaper or coatings be removed, followed by a second treatment of the exposed plaster to ensure complete sterilisation.
A) The solution is applied directly from the 500ml spray bottle without dilution. Shake well before use, then spray a liberal, even coat onto the affected surface from a distance of approximately 3 to 5 centimetres. Extend the application area by at least one metre beyond visible mould to cover any hidden contamination. For wallpapered surfaces, apply enough product to soak through the paper and loosen it for safe removal. Once wallpaper is stripped, spray the underlying plaster again. Allow the solution to remain on the surface for at least 30 minutes to ensure effective sterilisation before cleaning or redecorating.
A) A single 500ml bottle of Wykamol MCS1 Mould Clear Solution typically covers approximately 6.25 square metres, although coverage can vary depending on the porosity, texture, and condition of the surface. Rough or highly absorbent surfaces may require more product to achieve full saturation. For larger projects or repeated treatments, users may wish to consider Wykamol MCS1 Mould Clear Concentrate 5X, which dilutes to produce up to 25 litres of ready-to-use solution for larger surface areas.
A) Wykamol MCS1 Mould Clear Solution begins working within 30 minutes of application. After this time, most surfaces will show visible improvement, and mould should begin to detach or discolour. For severe cases, a second application may be necessary. Once the mould has been visibly treated, surfaces can be cleaned with warm soapy water and allowed to dry completely before further redecoration. This quick reaction time makes the product highly efficient for reactive maintenance tasks where time and cleanliness are critical.
A) Decoration should only commence once the treated surface is fully dry and, if needed, a second application has been completed. Before painting or wallpapering, ensure all loose material is scraped away and the substrate is sanded lightly to create a uniform surface. To maximise mould resistance in the finished space, Wykamol strongly recommends incorporating MCS3 Paint Additive into the final coat of paint. This ensures long-lasting protection and helps prevent mould reappearance beneath decorative finishes, especially in high-moisture areas like kitchens and bathrooms.
A) Yes, Wykamol MCS1 Mould Clear Solution is safe for indoor use and is approved under HSE No. 9453. It is designed specifically for interior mould treatment in both residential and commercial properties. The formula is low in odour and dries quickly, making it suitable for occupied spaces. However, standard safety precautions must be followed during application, including wearing gloves, eye protection, and a face mask, especially in poorly ventilated areas. Treated areas should be ventilated thoroughly and kept inaccessible to children and pets until surfaces are dry.
A) No, Wykamol MCS1 Mould Clear Solution does not contain bleach. Unlike bleach-based mould treatments that only discolour surface growth, this product contains specialised biocides—Benzalkonium Chloride and 2-Phenylphenol—which actively destroy mould spores and sanitise the substrate. This not only provides a deeper level of sterilisation but also reduces the risk of regrowth. The absence of bleach also means the solution is less likely to damage decorative finishes, making it suitable for use on painted or papered walls, timber, and other delicate interior surfaces.
A) The key difference lies in their formulation and intended scale of use. Wykamol MCS1 Mould Clear Solution is a ready-to-use product supplied in a 500ml trigger spray bottle, ideal for quick treatments of small to medium areas. In contrast, Wykamol MCS1 Concentrate 5X is a highly concentrated formula supplied in 5-litre containers that must be diluted with water before use. It is more economical for large-scale treatments and professional contractors dealing with recurring or extensive mould issues. Both products contain similar active ingredients and serve as the first stage in Wykamol’s mould control system.
A) When used as part of the Wykamol Mould Control System and environmental conditions are managed appropriately, the treated area can remain free from mould for up to five years. For ongoing protection, it is crucial to address underlying causes such as high humidity, poor ventilation, or condensation. Using Wykamol MCS3 Paint Additive in the final decorative coat greatly enhances the long-term resistance of surfaces by inhibiting mould regrowth at a microscopic level, even in environments prone to moisture build-up.
A) Yes, Wykamol MCS1 Mould Clear Solution is suitable for use on wallpaper. It should be sprayed directly onto mould-affected papered walls before any removal begins. This prevents the release of mould spores into the air during stripping. The solution also acts as a softening agent, making it easier to remove the paper cleanly. Once the wallpaper has been removed, the underlying surface should be treated again to ensure thorough sterilisation before redecoration. Always test a small area first to check for any potential discolouration.
A) Yes, Wykamol MCS1 Mould Clear Solution is approved and widely used in commercial environments such as offices, rental properties, care facilities, and schools. Its ready-to-use format and low odour make it ideal for quick, effective treatments in occupied buildings. Facility management teams can rely on it as part of routine maintenance protocols or as a remedial treatment following condensation-related outbreaks. Its professional-grade formulation ensures compliance with hygiene and safety standards, particularly when applied with the correct PPE and in accordance with the manufacturer’s guidance.
A) While Wykamol MCS1 Mould Clear Solution does provide immediate sterilisation of mould-affected areas, its long-term effectiveness is significantly improved when used in conjunction with Wykamol MCS3 Paint Additive. On its own, the solution leaves behind a short-term biocidal residue that can inhibit early regrowth, but to ensure lasting resistance to future outbreaks, a more integrated approach involving environmental management and protective coatings is recommended. This includes maintaining good ventilation and minimising sources of condensation in treated spaces.
A) After applying the solution and allowing the mould to be neutralised, clean treated surfaces with a damp sponge and warm, soapy water. Do not use dry cloths, as this may disturb residual spores. Cleaning tools such as sponges or cloths should be soaked in the solution before use and disinfected thoroughly afterwards to avoid transferring spores to other areas. All removed wallpaper or debris should be bagged and disposed of securely to prevent cross-contamination elsewhere in the property.
A) Yes, Wykamol MCS1 Mould Clear Solution is suitable for use on internal timber surfaces such as skirting boards, architraves, and window frames. Its biocidal formulation effectively kills mould without damaging wood when applied as directed. For older or delicate timber, it is advisable to conduct a patch test first to ensure the surface does not react to the product. After drying, light sanding may be needed before repainting to ensure a good key for new coatings, especially where mould has penetrated deeper into the grain.
A) The product should be stored in its original, sealed container in a cool, dry place out of direct sunlight and away from sources of heat or ignition. It must not be exposed to freezing conditions or extreme temperatures, as this may affect its stability. Keep the container tightly closed when not in use and out of reach of children and pets. Proper storage ensures that the active ingredients remain effective throughout the product’s shelf life, preserving its biocidal properties and ensuring reliable performance when needed.
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