Professional-Strength Surface Biocide for Pre-Treatment of Mould, Fungus & Algae. Biokil Crown ACS Mould Wash Concentrate is a powerful, concentrated biocidal cleanser designed to prepare interior and exterior surfaces by effectively removing mould, mildew, algae, and moss before painting or waterproofing. Simply dilute and apply with a brush, cloth, or spray to kill microbial growth at the root and prevent regrowth. Ideal for use on masonry, render, tiles, wood, and painted surfaces.. Key Features & Benefits. Highly Effective Biocide: Formulated to eradicate mould, mildew, algae, and lichen from porous and non-porous surfaces.. Prepares Substrates: Ensures contamination-free masonry or render for applying damp-proof or anti-condensation coatings.. Economical Dilution: Typically diluted at 1:19, a 250 ml bottle makes up to 5 litres of solution—covering up to ~60 m² depending on porosity.. Quick Action: Surface dries within 1–4 hours depending on ambient conditions. Heavy soiling may require a second application.. Safe Surface Use: Suitable for use on internal and external masonry, woodwork, tiles, patios, driveways, and roofs. Not recommended near watercourses.. Technical Specifications. Pack Size: 250 ml concentrate bottle (makes 5 litres of working solution). Coverage: ~50–60 m² per diluted batch (varies with surface porosity). Drying Time: 1–4 hours after application. Dilution Ratio: Standard 1:19 (1 part concentrate to 19 parts clean water); heavier contamination may use 1:9. Application Method: Apply by brush, sponge, or sprayer—leave to dry before decorating or sealing. Typical Uses. Eradicating mould, algae, lichen, and fungi from walls, ceilings, patios and tiles. Surface pre-treatment before applying paint, render, waterproof coatings or condensation control systems. Ideal for damp-prone conservatory walls, basements, bathrooms, kitchens, and utility rooms. Part of professional-grade mould control systems when used with Anti-Mould Emulsion or Mould Control Kits
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