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Bio-Wash Moss Remover is the maintenance professional's preferred broad spectrum biocide for controlling destructive moss, algae, and mould growth on exterior surfaces, including tarmac driveways, concrete paving, sandstone walls, brickwork, and building facades, where organic contamination threatens structural integrity.Read More
Due to ADR regs on transport of flammables we can only send 25L drums of solvent product via premium rate special carrier, hence minimum FREE carriage order is 4 x 25L or ring for a quote. Alternatively, you can still collect single 25L drums at our Ulverston or Glasgow trade counters.
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Bio-Wash Moss Remover represents the maintenance professional's preferred choice for controlling destructive moss growth on exterior hard surfaces including tarmac driveways, block pavers, sandstone paving slabs, concrete surfaces, and building walls.
This deeply penetrating aqueous biocidal solution targets the complete spectrum of damaging organic organisms including:
Concentrated Formula Excellence:
Understanding moss growth biology is crucial for effective building preservation. Unlike weeds requiring different herbicidal treatments, moss and algae demand specialized biocidal intervention targeting their unique cellular structures.
Documented Structural Damage Mechanisms:
Chloride Erosion Process: Moss root systems gradually compromise mortar integrity while retaining moisture up to 16 times their dry weight. This prolonged moisture retention encourages emergence of corrosive salts naturally present in damp mortar and adjacent brickwork or stonework. These salts accelerate mortar joint erosion, reducing structural lifespan by decades.
Freeze/Thaw Deterioration: Winter conditions create severe damage as moisture-laden moss freezes alongside trapped water in underlying mortar joints. Freezing water expansion ruptures mortar surfaces, permitting deeper water penetration and progressive frost damage leading to complete mortar joint failure.
Approved Substrates:
Pre-Treatment Excellence: Bio-Wash functions as essential preparation for:
Surface Sanitisation Technology: Proper application sanitises substrates, enhancing adhesion quality and longevity of protective treatments. This prevents organic delamination of costly finishes, ensuring decorative coating durability.
Surface Preparation Standards:
Application Techniques:
Method A: Post-Pressure Washing Surface Neutraliser. Even thorough pressure washing leaves microscopic spores and root systems within substrate crevices. Liberal application via brush or low-pressure pump sprayer renders surfaces organically inert as pre-treatment for subsequent surface coatings.
Method B: Direct Treatment Without Pressure Washing For friable substrates, including asbestos cement roofing, soft sandstone, or fragile brickwork requiring gentle treatment. Apply liberally and allow 7-day contact time before soft brushing or hosing.
Coverage Calculations:
Critical Application Parameters:
Preventive Maintenance Approach: Annual Bio-Wash treatments prevent moss accumulation reaching concentrations capable of building damage. This proactive strategy protects both decorative and structural integrity of hard landscaping and building facades.
Cost-Effective Building Preservation: Early intervention with broad spectrum biocides prevents expensive structural repairs, re-pointing projects, and decorative coating failures caused by organic contamination.
Enhanced Treatment Longevity: Surface sanitisation with Bio-Wash dramatically improves substrate stability, ensuring paint, resin, mortar, or water seal applications achieve maximum adhesion and service life.
Transform your building maintenance approach with professional-grade moss and mould removal technology. Protect your investment with scientifically formulated biocidal solutions trusted by maintenance professionals.
Two primary delivery options for smaller U.K MAINLAND orders (Typically under 100 Kg):
Standard 3-day service: £6.25 plus VAT (Note: Highlands Postcodes may be up to 5 working days)
Next Working Day*: £13.95 plus VAT (Not available to Highlands Postcodes)*Excludes weekends and public holidays
Cut-off time for “Next Working Day” orders to be processed is 12:00 noon. Once your goods have been despatched, you will normally receive a confirmatory e-mail with tracking details so that you can check the progress of your order. Details
Have used the Biocidal Wash as a surface neutraliser on our 18 year old patio slabs. After cleaning we applied the bio wash before sealing with K-Seal. The patio looks the best it's been since it was laid and no signs of any moss or lichen returning.
Reviewed by Bill
I have been using this product for many years. I now use it in my property maintenance business prior to using masonry paint on walls and buildings. It has always given excellent results. Used it last year on my father in laws old cottage which had not been painted for 25 years. This property is on Bodmin Moor in Cornwall and gets some extreme weather. The paint looks superb with no re-growth of algae etc. Can't give it a better accolade than that.
Reviewed by Martin Williams
We have an old sandstone boundary wall which is about 6 feet high and runs the length of our garden. It always has thick moss growing on it even though I wire brush it every year so I tried this - really effective - turns the moss brown in about 5 days!
Reviewed by J Simpson
Kingfisher Bio-Wash is a deep penetrating, broad spectrum biocide (of a category sometimes described as fungicidal wash), designed to give quick and efficient removal of all moss, green mould, algae or lichen from a wide range of outdoor, mineral based surfaces such as walls, paving, patios, roofs and driveways. Supplied as a concentrated liquid, one 5 litre container diluted, makes 25 litres of ready-to-use cleaner, which will treat up to 125 sq.m.
Bio-Wash is easy to use and an essential pre-treatment, prior to the application of any of the Kingfisher range of masonry water seal, paving resin, roof coating and masonry paint. It is available in either READY TO USE or CONCENTRATE form.
Companion / Related Products:
• Kingfisher Kolourseal• Kingfisher Asbestos Roof Coating• Kingfisher K-Seal, Restore-A-Drive, Ultimate Topcoat, Imprintseal, Blockstar, Indian Sandstone Sealer• Kingfisher Extreme Climate, Stormseal, Superseal• Kingfisher Weatherflex• Kingfisher Coloured Pointing Mortar• Kingfisher Eco-brick CleanerRefer to these individual product data sheets for detailed application guidance published on our website www.kingfisheruk.com.
www.kingfisheruk.com
To eradicate damaging moss and other organic matter from, and also to retard its re-growth onto, the following surfaces:• Concrete & Clay Roof Tiles• Asbestos cement roof sheet• Tarmac• Slate roofs• Sandstone & Limestone• Concrete paths & yards• Paving including: man-made flags, blocks and natural stone• Wall both brick & stone• Mortar jointsIf in doubt, please call our technical services department on 01229 869 100 for guidance.
• Ease of application by brush or low-pressure spray (non-atomising)• Versatile application• No rinsing required• Kills the moss and mould spores/roots which weed-killers do not
Hard surface biocides are increasingly used in conjunction with powered pressure washers in both commercial and domestic settings, to clean or prepare surfaces for various types of decorative or protective coating. In that sense therefore Kingfisher Bio-Wash is THE surface preparation! Often no preparation is necessary, providing the surfaces to be treated are fairly dry and free from “ponding” water.
For paved or tarmac areas, if there are weeds(broadleaf/grass) as well as moss, these should be sprayed first with a premium grade weed killer as directed.
Asbestos cement roofs contaminated with moss are often at significant height above ground and should typically be surveyed by a competent industrial roofing professional before treatment. They can be fragile and require non-destructive cleaning methods (precludes pressure washing), as well as the expertise to identify potential structural issues and establish safe working protocols including access for the surface preparation phase.
The concentrate should be diluted 1 part Kingfisher Bio-Wash with 4 parts clean water. Also available as Ready to Use. Apply using a brush or a low-pressure pump sprayer (typical garden weed sprayer) and ensure thorough surface wetting.a. As a Surface Neutraliser (after pressure washing): Even through pressure washing leaves microscopic roots and spores within the substrate, joints and crevices, which can rapidly re-grow if unchecked. Liberally apply Kingfisher Bio-Wash by brush or low-pressure spray (not atomiser) to thoroughly sanitise the surface as a pre-treatment for subsequent application of the appropriate Kingfisher surface coating. DO NOT RINSE OFF. Leave until the Bio-Wash has dried in or for a minimum of 1 to 2 hours before subsequent coating.b. As an Aggressive Moss & Mould Inhibitor (without pressure-washing): For very heavily moss or mould contaminated surfaces, which cannot be pressure washed, e.g asbestos cement roof sheets, soft sandstone walls, soft bricks etc. Apply liberally over the entire area by brush or low-pressure spray (not atomiser) and leave to activate or at least 7 days before brushing scraping or soft hosing the surface clean. NOTE: If scraping dead moss from asbestos cement roof sheets, ensure the surface is damped with water to prevent fibre release and wear the recommended PPE for WORKING WITH ASBESTOS, including gloves, face mask and coveralls.
Kingfisher Bio-Wash
DO NOT apply at air or surface temperatures below +6°C.
There are some situations where a surface has been contaminated for a protracted period of time and this can result in deep staining of the substrate. Some lichens for example will resist even powerful pressure washing with turbo or rotary jet nozzles. In such cases we recommend contacting our technical services department as there are too many variations to list here.
Brushes and sprayers can be cleaned in warm soapy water.
5 litres of Concentrate treats: 125 sq.m (when diluted with 20 litres of clean water)1 litre of Concentrate treats: 25 sq.m (when diluted with 4 litres of clean water)5 litres of Ready to Use treats: 25 sq.m25 litres of Ready to Use treats: 125 sq.m
Kingfisher Bio-Wash is supplied in 5 & 25 litre plastic containers
The product has a shelf life of 12 months unopened from the date of manufacture, subject to correct storage conditions. Store upright in original sealed packaging in a cool dry place, out of direct sunlight Keep out of reach of children.
a) Whilst Kingfisher Bio Wash is not a weed-killer, in very dry conditions it may temporarily burn or discolour grass & broadleaf vegetation. Take care to avoid overspray when treating paths or driveways adjacent to lawns. A simple protection is to lay a broad plank of wood along the grass edge to catch the overspray.b) Avoid contact with metal or anodised finishes.c) This class of biocides relies upon U V light activation. You will achieve more consistent results with spring/summer application than in winter.d) Never load Bio-Wash into the pressure washer soap reservoir for application under pressure.
This product is classified as an irritant and users should avoid splashing when handling the product and wear appropriate protective clothing, impervious glove and eye protection during application. Inc case of contact with skin or eyes rinse the affected area immediately with copious amounts of clean water. Repeated/prolonged contact with the skin may cause sensitisation. Should irritation persist seek medical attention. Keep children and pets away from treated area until the Bio Wash has fully dried.
• If applying by spray wear a face mask, disposable gloves and coveralls• Avoid contact with skin and eyes• If contact occurs wash immediately with plenty of water• Keep out of reach of children• Ensure good ventilation during application and drying• Always dispose of empty packaging responsibly
This product is non-flammable
Before using this product read the Material Safety Data Sheet which can be obtained at www.kingfisheruk.com or by calling the Kingfisher Technical Dept. Tel: 01229 869 100.
The information given in this product data sheet is given in good faith, based on current knowledge and experience. It relates only to the specific material designated and may not be valid for such material used in combination with any other materials or in any process. Such information is to the best of the company’s knowledge and belief, accurate as of the date indicated.
All recommendations are made without warranty or guarantee, as to accuracy, reliability, completeness since the conditions of use are beyond our control. It is the user’s responsibility to satisfy themselves as to the suitability and application of such information for their own use
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Our wall stabilising solution stabilises friable mortar, hardens surfaces which have "gone soft" due to weathering and allows you to paint straight after re-rendering or pointing in preparation for the application of "Weatherflex". Improves adhesion and depth of colour finish.
Born in the unforgiving fells of Cumbria, Weatherflex doesn't just survive British weather; it thrives in it. While ordinary masonry paints crack, fade, and fail, Weatherflex flexes with your walls, repels the worst storms, and stays beautiful year after year.
Weatherflex Premium Masonry Paint provides superior waterproof protection for your home exterior. Covers brick, stone, render & pebbledash with a breathable, flexible coating that lasts 15 years. Available in 72 contemporary colours from our Lakes & Fells collection. Excellent coverage of 5-6m² per litre. Water-based, non-toxic formula that allows walls to breathe while keeping moisture out. Perfect for UK weather conditions. Next day delivery available. £37.02 inc. VAT.
