Best Composite Decking Cleaner of 2026

Last updated on 04/04/2026
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Best Choice
1
9.8
Exceptional
HLS Supplies 10L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings
HLS Supplies

HLS Supplies 10L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings

Why we love it
  • Efficient and high-performance cleaning.
  • Promises long-lasting deck protection.
  • Suitable for versatile applications.
Main Highlights
  • Composite Decking Cleaner & Aftercare - Experience the best in composite decking maintenance with our multipack, featuring both our Composite decking cleaner and Aftercare solutions. Designed for ultimate clean and protection, ensuring your decking looks and maintains pristine.
  • Effective Composite Deck Cleaner - Experience unparalleled cleaning power with HLS Composite Decking Cleaner. Our advanced formula is engineered to remove stubborn dirt, grease, algae, and mould, penetrating deeply to lift and eradicate unsightly build-up.
  • Aftercare - Once cleaned follow up with our Composite Decking Aftercare for an impeccable finish. Specially formulated to remove green staining caused by algae and protect your decking for up to 6 months. Witness visible results within 2 days, ensuring long-lasting cleanliness and protection.
  • Easy to Use - Simply dilute the cleaner with a 10:1 water-to-cleaner ratio then apply with a brush or sprayer, and rinse off for hassle-free cleaning. Apply using a variety of methods, including a pump spray, pressure washer, or a simple brush, catering to all your cleaning needs. For the aftercare solution dilute with a 4:1 water-to-cleaner ratio then apply with a garden sprayer.
  • HLS Supplies - Developed and Manufactured in the UK, our mission is to manufacture effective cleaning solutions for a broad spectrum of applications, including domestic, commercial, automotive, and industrial. Our range of cleaning chemicals is carefully crafted to ensure superior performance across all intended applications.
9.8
Exceptional
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🛡️Trusted by 100M+ UsersWhy?
Best Value
2
9.8
Exceptional
Pro-Kleen Ultimate Composite Decking Cleaner 2 x 5L Simply Spray & Walk Away Free From Acid & Bleach Concentrated Mix 5:1 Covers 480sq Metres, Prevents Algae, Mould and Dirt, Pet & Child Safe Once Dry
Pro-Kleen

Pro-Kleen Ultimate Composite Decking Cleaner 2 x 5L Simply Spray & Walk Away Free From Acid & Bleach Concentrated Mix 5:1 Covers 480sq Metres, Prevents Algae, Mould and Dirt, Pet & Child Safe Once Dry

Why we love it
  • Tackles tough stains quickly.
  • Multi-surface use for versatility.
  • Safe for pets and children.
Main Highlights
  • Tackles Tough Stains: Removes dirt, algae, moss, and mould with ease, restoring your outdoor surfaces
  • Multi-Surface Cleaner: Perfect for composite decking, patios, driveways, brickwork, and fencing
  • Highly Concentrated Formula: One 5L bottle covers up to 240 square meters, delivering great value
  • Long-Lasting Protection: Prevents the return of green mould and algae for up to 6 months
  • Safe and Eco-Friendly: Biodegradable, non-corrosive, pH-neutral, bleach-free, and vegan-friendly
9.8
Exceptional
Amazon Logo
3
9.6
Superb
HLS Supplies 5L Composite Plastic Decking Cleaner and Reviver - Removes Dirt, Grime and Bird Droppings
HLS Supplies

HLS Supplies 5L Composite Plastic Decking Cleaner and Reviver - Removes Dirt, Grime and Bird Droppings

Why we love it
  • Unparalleled deep cleaning power.
  • Versatile application methods.
  • Concentrated, value for money.
Main Highlights
  • Effective Composite Decking Cleaner - Experience unparalleled cleaning power with HLS Composite Decking Cleaner. Our advanced formula is engineered to remove stubborn dirt, grease, and most types of algae, and mould, penetrating deeply to lift and eradicate unsightly build-up.
  • Versatile Use - Ideal for composite decking, fencing, and cladding, HLS Composite Decking Cleaner can be applied using a variety of methods, including a pump spray, pressure washer, or a simple brush, catering to all your cleaning needs.
  • Easy to Use - Simply dilute with a 10:1 water-to-cleaner ratio then apply with a brush or sprayer, and rinse off for hassle-free cleaning. Combine with CDA-50 Composite Decking Aftercare for the best results, provides lasting protection against green staining and environmental impacts.
  • Large Range of Sizes - Need more? Choose from 1L, 5L, 20L and 25L options, meaning no job is too large for our all in one composite decking cleaner.
  • HLS Supplies - Developed and Manufactured in the UK, our mission is to manufacture effective cleaning solutions for a broad spectrum of applications, including domestic, commercial, automotive, and industrial. Our range of cleaning chemicals is carefully crafted to ensure superior performance across all intended applications.
9.6
Superb
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4
9.4
Superb
Furniture Clinic Composite Decking Cleaner 5L – Quick Acting Cleaning Formula – Cleans Green Algae and Mould - Use one Plastic Sheds and Fences
Furniture Clinic

Furniture Clinic Composite Decking Cleaner 5L – Quick Acting Cleaning Formula – Cleans Green Algae and Mould - Use one Plastic Sheds and Fences

Why we love it
  • Deeply cleans and revives.
  • Removes dirt and algae.
  • Gentle bleach-free formula.
Main Highlights
  • DEEP CLEANING: Our advanced formula Composite Decking Cleaner provides highly effective results for cleaning plastic decking, sheds, fences.
  • REMOVES GREEN STAINING: Composite Decking Cleaner will clean dirt, grease, and green staining from your decking. For heavy staining or moss, use our Green Growth Remover.
  • EASY TO USE: This plastic decking cleaner works quickly and is easy to use. There is no need to use a pressure washer.
  • BLEACH-FREE FORMULA: Our ready-to-use Composite Decking Cleaner is tough on dirt but will be gentle to your decking and will not damage the surface.
  • COVERAGE: Coverage: 5 litres will clean 25 m2. Use on composite decking as well as garden furniture, planters, cladding, sheds, and fences made from composites.
9.4
Superb
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5
9.3
Superb
HLS Supplies 2L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings
HLS Supplies

HLS Supplies 2L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings

Why we love it
  • Restores decking to original glory.
  • Offers long-lasting cleanliness and protection.
  • Easy and versatile application.
Main Highlights
  • Composite Decking Cleaner & Aftercare - Experience the best in composite decking maintenance with our multipack, featuring both our Composite decking cleaner and Aftercare solutions. Designed for ultimate clean and protection, ensuring your decking looks and maintains pristine.
  • Effective Composite Deck Cleaner - Experience unparalleled cleaning power with HLS Composite Decking Cleaner. Our advanced formula is engineered to remove stubborn dirt, grease, algae, and mould, penetrating deeply to lift and eradicate unsightly build-up.
  • Aftercare - Once cleaned follow up with our Composite Decking Aftercare for an impeccable finish. Specially formulated to remove green staining caused by algae and protect your decking for up to 6 months. Witness visible results within 2 days, ensuring long-lasting cleanliness and protection.
  • Easy to Use - Simply dilute the cleaner with a 10:1 water-to-cleaner ratio then apply with a brush or sprayer, and rinse off for hassle-free cleaning. Apply using a variety of methods, including a pump spray, pressure washer, or a simple brush, catering to all your cleaning needs. For the aftercare solution dilute with a 4:1 water-to-cleaner ratio then apply with a garden sprayer.
  • HLS Supplies - Developed and Manufactured in the UK, our mission is to manufacture effective cleaning solutions for a broad spectrum of applications, including domestic, commercial, automotive, and industrial. Our range of cleaning chemicals is carefully crafted to ensure superior performance across all intended applications.
9.3
Superb
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6
9.2
Superb
Chemical Trade Store - Composite Decking Cleaner - Plastic UPVC Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings - 5 Litre
Chemical Trade Store

Chemical Trade Store - Composite Decking Cleaner - Plastic UPVC Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings - 5 Litre

Why we love it
  • Cleans and revives outdoor surfaces.
  • Extra-strength formulation for tough stains.
  • Versatile for various outdoor materials.
Main Highlights
  • Powerful Cleaning Action: Removes dirt and grime effortlessly. Designed to rejuvenate your decking with a strong formula that restores natural vibrancy and shine.
  • High-Strength Formula: Tackles grease and tough stains effectively. Ensures your decking and outdoor areas remain spotless and well-maintained for long-lasting beauty.
  • Versatile Usage: Ideal for outdoor surfaces beyond decking, including patios and fences. Keeps all areas of your garden looking stunningly clean and well cared for.
  • Simple Application: Apply using a sprayer, pressure washer, or brush. Chemical Trade Store's cleaner guarantees an easy and efficient cleaning process for all users.
  • Universal Compatibility: Works on softwood, hardwood, and composite decking. Offers a one-stop solution for diverse outdoor cleaning needs, enhancing versatility.
9.2
Superb
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7
9.0
Superb
Rustins Composite Decking Cleaner - Effective Mold and Mildew Remover | Deep Cleaning Solution for Decks, Patios, and Outdoor Spaces 4 litre
RUSTINS

Rustins Composite Decking Cleaner - Effective Mold and Mildew Remover | Deep Cleaning Solution for Decks, Patios, and Outdoor Spaces 4 litre

Why we love it
  • Powerful mold, mildew removal.
  • Delivers long-lasting protection.
  • Hassle-free application process.
Main Highlights
  • Powerful Mold and Mildew Removal: Rustins Composite Decking Cleaner effectively eliminates mold and mildew, restoring your deck to its pristine condition. Say goodbye to unsightly stains and discoloration.
  • Gentle Yet Effective Formula: Our cleaner is tough on mold and mildew, yet gentle on your composite decking. It won't damage the surface or compromise its integrity, ensuring long-lasting results.
  • Versatile Outdoor Cleaning Solution: Not just for decks, our cleaner is perfect for patios, fences, and other outdoor surfaces. Effortlessly restore the beauty of your entire outdoor space. ADD TO BASKET now.
  • Easy to Use: Simply apply, scrub, and rinse for a thorough clean. Our cleaner is hassle-free and requires minimal effort, saving you time and energy.
  • Long-lasting Protection: Formulated to provide lasting protection against mold and mildew, our cleaner helps prevent future growth, keeping your composite decking looking fresh and new
9.0
Superb
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8
8.9
Excellent
Chemical Trade Store - Composite Decking Cleaner | Plastic UPVC Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings - 2.5 Litre
Chemical Trade Store

Chemical Trade Store - Composite Decking Cleaner | Plastic UPVC Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings - 2.5 Litre

Why we love it
  • Cleans and revives outdoor surfaces.
  • Extra-strength tackles stubborn stains.
  • Versatile for various decking types.
Main Highlights
  • Cleans and Revives: Chemical Trade Store Composite Decking Cleaner effectively removes built-up dirt, grime, and debris while breathing new life into your composite decking, helping to restore its original vibrancy and enhancing its overall appearance.
  • Extra-Strength Formulation: The extra-strength formulation of Chemical Trade Store Composite Decking Cleaner tackles a wide range of outdoor contaminants, from stubborn grease and dirt to stubborn stains, leaving your decking looking fresh and well-maintained.
  • Versatile Outdoor Cleaning: Not just for decks, Chemical Trade Store Composite Decking Cleaner is perfect for patios, fences, and other outdoor surfaces. Effortlessly restore the beauty of your entire outdoor space.
  • Variety of Applications: Suitable for all composite materials, Chemical Trade Store Composite Decking Cleaner is incredibly easy to apply. Whether you use a sprayer, pressure washer, or brush, Chemical Trade Store Composite Decking Cleaner ensures a simple and hassle-free cleaning process.
  • Suitable for all types of decking: Suitable and effective on all types of decking, including softwood, hardwood, and composite materials, making it a versatile choice for various outdoor decking.
8.9
Excellent
Amazon Logo
9
8.8
Excellent
Pro-Kleen Ultimate Composite Decking Cleaner 5L Simply Spray & Walk Away Free From Acid and Bleach Concentrated Mix 5:1 Covers 240sq Metres, Prevents Algae, Mould and Dirt, Pet and Child Safe Once Dry
Pro-Kleen

Pro-Kleen Ultimate Composite Decking Cleaner 5L Simply Spray & Walk Away Free From Acid and Bleach Concentrated Mix 5:1 Covers 240sq Metres, Prevents Algae, Mould and Dirt, Pet and Child Safe Once Dry

Why we love it
  • Tackles tough stains effortlessly.
  • Covers large areas efficiently.
  • Safe for pets and children.
Main Highlights
  • Tackles Tough Stains: Removes dirt, algae, moss, and mould with ease, restoring your outdoor surfaces
  • Multi-Surface Cleaner: Perfect for composite decking, patios, driveways, brickwork, and fencing
  • Highly Concentrated Formula: One 5L bottle covers up to 240 square meters, delivering great value
  • Long-Lasting Protection: Prevents the return of green mould and algae for up to 6 months
  • Safe and Eco-Friendly: Biodegradable, non-corrosive, pH-neutral, bleach-free, and vegan-friendly
8.8
Excellent
Amazon Logo
10
8.7
Excellent
Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt, Algae Marks & Surface Build-Up
Chemical Trade World

Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt, Algae Marks & Surface Build-Up

Why we love it
  • Deep cleans composite decking.
  • Gentle on low upkeep boards.
  • Lifts dirt and algae marks.
Main Highlights
  • Rinse-Off Cleaner for Composite Decking - Designed for active cleaning, this rinse-off solution is applied, agitated and rinsed away, making it suitable for deeper cleaning of composite decking surfaces.
  • Formulated for Composite & Plastic Boards - Developed specifically for composite and plastic decking, helping clean without damaging low-maintenance boards or textured finishes.
  • Removes Dirt, Algae Marks & Surface Build-Up - Works to lift everyday dirt, algae marks and general surface build-up that can affect the appearance of composite decking over time.
  • Ideal for Low-Maintenance Decking Care - Well suited to routine maintenance and seasonal refreshes, helping restore a cleaner, more even finish to composite decking areas.
  • Suitable for Domestic & Trade Use - Supplied in larger pack sizes for practicality, making it suitable for homeowners, contractors and facilities maintenance applications.
8.7
Excellent
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Related Deals You Might Like for Composite Decking Cleaner

📊We scanned 354 products
🔍
We reviewed the most relevant Composite Decking Cleaner offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like HLS Supplies, Pro-Kleen, Furniture Clinic, Chemical Trade Store, RUSTINS, Chemical Trade World, known for dependable quality and smart design.
⭐
To determine today's best Composite Decking Cleaner, we analysed 1771 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

What we concluded:

🏆 #1
HLS Supplies 10L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings

Our overall winner is HLS Supplies 10L Composite Plastic Decking Cleaner and Reviver & Aftercare Pack - Deck Algae and Mould Remover - Removes Dirt, Grime and Bird Droppings by HLS Supplies. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Efficient and high-performance cleaning
✓Promises long-lasting deck protection
✓Suitable for versatile applications
💎 Best Value
Pro-Kleen Ultimate Composite Decking Cleaner 2 x 5L Simply Spray & Walk Away Free From Acid & Bleach Concentrated Mix 5:1 Covers 480sq Metres, Prevents Algae, Mould and Dirt, Pet & Child Safe Once Dry

The best value for most shoppers is Pro-Kleen Ultimate Composite Decking Cleaner 2 x 5L Simply Spray & Walk Away Free From Acid & Bleach Concentrated Mix 5:1 Covers 480sq Metres, Prevents Algae, Mould and Dirt, Pet & Child Safe Once Dry by Pro-Kleen, with consistently high satisfaction across expert and customer reviews.

💰 Best Deal
Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt, Algae Marks & Surface Build-Up

The strongest deal right now for Composite Decking Cleaner is Chemical Trade World - Composite Decking Cleaner 5L - Rinse-Off Cleaning Solution for Composite & Plastic Decking - Removes Dirt, Algae Marks & Surface Build-Up at Chemical Trade World, currently at % off.

🔄Our Composite Decking Cleaner ranking is updated regularly to reflect new releases and price changes—check back for the latest picks and deals.