Extreme Clean Patio Cleaner – High Strength 20.0 kg

Q: How fast does this patio cleaner work?

Visible results in 10–15 minutes on moss and algae. Repeat for black spot lichen.

Q: Will it damage my patio or driveway surface?

No – safe on concrete, block paving, slabs & brick when rinsed well.

Q: Can I use this as a driveway cleaning solution?

Yes – it’s ideal for driveways affected by moss, algae, or oil marks.

Q: Can I use it as a patio bleach cleaner?

Yes – this product functions as a heavy-duty patio bleach cleaner with high chlorine content.

Q: What’s the shelf life?

Use within 3–6 months for maximum strength.

Q: Safe for pets?

Yes, after surfaces are fully rinsed and dry (allow at least 48 hours).

Q: Can I mix this with acid cleaners or other products?

Never mix with acids – it will release toxic chlorine gas.

Q: Will it work on black spot lichen?

Yes – may require neat application and light brushing for full removal.

Q: Can this be used on roofs or walls?

Yes – suitable for moss and algae removal on hard surfaces like render or tiles.

Q: How do I dispose of leftover solution?

Dilute heavily and flush into a foul drain per local regulations.

Manufactured by Extreme Clean

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 is a professional patio cleaner containing 14–15% sodium hypochlorite — a bleach-based, high-performance cleaning fluid for outdoor surfaces. Engineered to eliminate heavy organic growth from driveways, block paving, concrete patios, paving slabs, stone, brick, render, walls, and fences.

It works in minutes to break down moss, algae, black lichen, mildew and staining — making it the go-to moss remover and algae cleaner for homeowners and contractors. For less severe contamination, dilute up to 1:6. For deep stains, apply neat with care.

Also suitable for use as a liquid chlorine treatment in swimming pool maintenance, and as a general surface sanitiser for outdoor hardscapes.

Ideal Uses

Patios & concrete driveways
Block paving & paving slabs
Fence panels & brick walls
Roof tiles & guttering
Pool surrounds & pool water treatment
Outdoor surfaces needing sanitisation

Sizes & Coverage

Size	Routine Clean (1:6)	Heavy Clean (1:3)	Neat
5 L	up to 50 m²	≈ 25 m²	≈ 10 m²
10 L	up to 100 m²	≈ 50 m²	≈ 20 m²
20 L	up to 200 m²	≈ 100 m²	≈ 40 m²

Coverage varies based on porosity and contamination levels.

Safety First
Wear gloves, eye protection and old clothes. Keep pets and children away until fully rinsed and dry.

Instructions:

Dilute: Mix 1 part solution with 3–6 parts water depending on contamination.
Pre-wet vegetation and protect plants from splash.
Apply: Use a watering can, sprayer, or stiff brush.
Dwell Time: Leave for 10–15 mins (don't let it dry out).
Agitate & Rinse: Scrub tough areas; rinse with hose or pressure washer.

Neutralise lawn runoff with fresh water immediately.

Property	Value
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
VOC	0 g/L
Containers	UN-approved HDPE (5 L, 10 L, 20 L)

COVERAGE CALCULATOR

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Frequently Asked Questions

How fast does this patio cleaner work?

Visible results in 10–15 minutes on moss and algae. Repeat for black spot lichen.

Will it damage my patio or driveway surface?

No – safe on concrete, block paving, slabs & brick when rinsed well.

Can I use this as a driveway cleaning solution?

Yes – it’s ideal for driveways affected by moss, algae, or oil marks.

Can I use it as a patio bleach cleaner?

Yes – this product functions as a heavy-duty patio bleach cleaner with high chlorine content.

What’s the shelf life?

Use within 3–6 months for maximum strength.

Safe for pets?

Yes, after surfaces are fully rinsed and dry (allow at least 48 hours).

Can I mix this with acid cleaners or other products?

Never mix with acids – it will release toxic chlorine gas.

Will it work on black spot lichen?

Yes – may require neat application and light brushing for full removal.

Can this be used on roofs or walls?

Yes – suitable for moss and algae removal on hard surfaces like render or tiles.

How do I dispose of leftover solution?

Dilute heavily and flush into a foul drain per local regulations.

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£59.99 (inc VAT)

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Size

20 Litres 5 Litres

Product variants

*subject to stock levels at the time of your order.