Extreme Clean Patio Cleaner High Strength Sodium Hypochlorite 20.0 kg
Why Choose Our Products?

Super-concentrated concrete patio cleaner – 14–15% active chlorine

Kills moss algae lichen & mould within 10–15 minutes

Treats up to 200 m² – dilute up to 1:6 for routine use

Acts as an outdoor surface disinfectant for patios & pool areas

Also used as patio bleach cleaner and for swimming pool chlorination

Supplied in UN-approved containers with free next-day delivery (UK Mainland)
Extreme Clean Patio Cleaner is a high-strength, professional-grade outdoor cleaning solution, formulated with 14–15% sodium hypochlorite for optimal performance. This powerful bleach-based cleaner swiftly eliminates black spot lichen, moss, algae, mildew, mold, and various stains from various outdoor surfaces. It is ideal for cleaning patios, block paving, concrete driveways, natural stone, brickwork, render, and fences.
Unlike conventional patio cleaning products, its potent composition delivers visible results within minutes, making it a preferred choice for professional contractors, landscapers, and homeowners seeking efficient outdoor cleaning solutions without extensive scrubbing. For minor contamination, a dilution ratio of up to 1:6 with water is effective, while stubborn stains may require careful, neat application for maximum strength cleaning.
Beyond its primary use as a patio and hardscape cleaner, this versatile solution also functions as a liquid chlorine treatment for swimming pool maintenance and a general outdoor hardscape sanitizer. Manufactured in the UK under ISO 9001 quality assurance, Extreme Clean Patio Cleaner is available in 5 L, 10 L, and 20 L packs, offering cost-effective coverage for outdoor cleaning projects of any scale, ensuring a spotless outdoor environment.
Ideal Uses
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Patios & Concrete Driveways: Our products effectively clean and restore patios and concrete driveways, removing dirt, grime, moss, and other stains.
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Block Paving & Paving Slabs: We offer solutions specifically designed for block paving and paving slabs, ensuring a thorough clean and long-lasting protection.
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Fence Panels & Brick Walls: Our range includes products suitable for cleaning and maintaining fence panels and brick walls, helping to remove algae, mold, and general discoloration.
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Roof Tiles, Render, and Guttering: Keep your roof tiles, render, and guttering free from dirt and organic growth with our specialized cleaning agents.
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Pool Surrounds & Pool Water Treatment: We provide products for cleaning pool surrounds, preventing slipperiness and maintaining hygiene, as well as solutions for effective pool water treatment.
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Outdoor Surfaces Requiring Sanitization: For any outdoor surface needing sanitization, our products offer a powerful and efficient solution, ensuring a clean and hygienic environment.
Sizes & Coverage
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5 L: Up to 50 m² (Routine), ≈ 25 m² (Heavy), ≈ 10 m² (Neat)
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10 L: Up to 100 m² (Routine), ≈ 50 m² (Heavy), ≈ 20 m² (Neat)
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20 L: Up to 200 m² (Routine), ≈ 100 m² (Heavy), ≈ 40 m² (Neat)
Coverage varies based on surface porosity and contamination levels.
Storage & Handling
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Store securely in a cool, dry, ventilated place, away from heat and flames.
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Always keep the container sealed between uses.
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Do not mix with acids, other cleaners, or detergents.
Thinners can be diluted with water depending on the cleaning intensity.
Safety Disclaimer
Extreme Clean Patio Cleaner is a chlorine-based chemical. Use with caution:
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Always wear protective gloves, goggles, and old clothing.
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Avoid inhalation of vapours and prevent contact with skin or eyes.
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If contact occurs, rinse immediately with clean water and seek medical advice if irritation persists.
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Keep away from pets and children until surfaces are rinsed and dry.
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Dispose of waste in line with local environmental regulations.
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Refer to the Safety Data Sheet (SDS) for complete guidance.
Property | Value |
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Chemical name | Sodium Hypochlorite solution |
Available chlorine | 14–15% |
pH (neat) | > 12 |
CAS number | 7681‑52‑9 |
Appearance / Odour | Pale yellow liquid / strong bleach smell |
Shelf life | 6 months (store < 24 °C, out of sunlight) |
Property | Value |
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VOC | 0 g/L |
Containers | UN-approved HDPE (5 L, 10 L, 20 L) |
Frequently Asked Questions
Select Variant and Order
Delivery within 24 to 48 hours
Extreme Clean Patio Cleaner High Strength Sodium Hypochlorite - 20 Litres is backordered and will ship as soon as it is back in stock.
