10 Best Composite Decking Cleaner And Restorer in The UK

Last updated on 27/08/2025

Advertising disclosure

SmartSeal Deck Cleaner - Powerful And Efficient Composite Decking Cleaner & Fence Cleaner- No Pressure Washing - Concentrated Formula Decking Cleaner for Wood - Removes Algae Easily! (5 Litre)

Why We Love It

Revitalises and cleans decks effectively.
Eliminates need for pressure washing.
DIY, easy composite decking restoration.

Main Highlights

🧹 REVITALISE AND CLEAN YOUR DECK WITH SMARTSEAL DECK CLEANER - High-Performance Decking Cleaner and Reviver. Specifically designed to remove green growth, algae, and black spot lichens from decks, fences and other external wooden surfaces, this powerful non-acidic formula ensures thorough cleaning. Say goodbye to unsightly growth and enjoy a rejuvenated wooden deck with this highly effective decking cleaner and algae remover.
🛠️ RESTORE YOUR DECK WITH CONFIDENCE - Say goodbye to the need for pressure washing, which could potentially damage your decking. Our deck restorer is designed to remove the need for aggressive pressure washing, preventing potential damage such as marks, striping, and compromised wood integrity. Safely revive your composite or wooden decking with our effective formula. Revive the colour and beauty of your garden decking with our trusted deck restorer.
🦠 POWERFUL DECKING ALGAE REMOVER AND RESTORER - Experience the ultimate solution for killing off green growth and removing organic matter from your decking and garden furniture. Our formula contains potent biocides specifically designed to target and eliminate green algae and other organic substances such as black lichen. Revive the colour and appearance of your composite decking with our effective and reliable decking restorer.
🧑‍🔧EFFORTLESS COMPOSITE DECKING RESTORATION - Rejuvenate your composite decking and restore its vibrant colour with ease. Our composite decking restorer provides a simple DIY solution that can be carried out by anyone. Simply apply the product and work it into the surface using a brush or stiff broom, then allow it to sit for 1-2 hours. Finally, rinse with water. No professional assistance required - you can confidently undertake this project yourself.
🧴 SUPERIOR BLACK SPOT AND ALGAE REMOVER - Discover the power of our algae remover and cleaner. Effortlessly eliminate algae, grime, and black spots. Most dirt and grime disappear after one application, for a "Good as New" look. For stubborn areas, consider a second coat. Say goodbye to green algae and black lichen with our effective deck cleaning solution.

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.

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.

Furniture Clinic Composite Decking Cleaner – Quick Acting Formula to Clean Composite Decking – Removes Green Staining - 5L

Free Shipping

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 decking.
REMOVES GREEN STAINING: Composite Decking Cleaner will remove dirt, grease, and green staining from your decking. It will also help to prevent regrowth of algae and lichen. For heavy staining, use our Green Growth Remover.
EASY TO USE: This plastic decking cleaner and reviver 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.

Restores original vibrant color.
Works on multiple surfaces.
Easy to apply solution.

Main Highlights

Colour restorer for dull or faded surfaces including car trims <ul> <li>Restores the colour and appearance of dull and faded surfaces caused by exposure to sunlight, rain and pollution</li> <li>Deep penetrating oil that restores the original look and finish to gelcoat, plastic, metal and other surfaces </li> <li>Protects against corrosion and blemishes</li> <li>On bare metals Polytrol restores the shine and protects against corrosion </li> <li>Now available in a handy 250ml spray can</li> </ul>

Restoring Colour and Appearance of Faded Composite uPVC Doors | 250ml

Free Shipping

Why We Love It

Restores and brightens faded surfaces.
Provides enduring weather resistance.
Efficient, non-drip application.

Main Highlights

Restores original colour and appearance of coloured composite doors.
Effective on faded or dull composite and uPVC doors, windows and shutters.
Also works on other coloured outdoor surfaces which have become faded and weather-damaged.
Provides a weather resistant enduring barrier which protects against the effects of weathering and sun damage.
Non-drip formula; easy to apply; great value - a little goes a long way.

Ronseal DR25L 2.5L Decking Restorer

Free Shipping

Why We Love It

Restores natural deck appearance.
Brightens and revives timbers.
Effortless application and use.

Main Highlights

Ronseal Decking Restorer is the quick and easy way to safely restore grey or weathered decking back to its natural appearance with the minimum of effort and fuss
The unique non-acidic, gel formulation will brighten and revive dull and weathered timbers to leave your deck looking clean, newly restored and transformed to it's original colour
Easy to use

Furniture Clinic 5L Decking Cleaner for Wood - Weathered Deck Cleaner, Stain Remover & Restorer - Clean & Remove Dirt & Algae from Wooden Garden Patio Surfaces

Free Shipping

Why We Love It

Restores wood to original colour.
Fast acting, no scrubbing required.
Removes stains, kills algae.

Main Highlights

ADVANCED FORMULA: Our wood Decking Cleaner and reviver provides highly effective results for cleaning and reviving garden decking, sheds, and fences. It cleans and restores the wood, bringing it back to its original colour.
QUICK ACTING AND EASY TO USE: Fast-acting and hassle-free. Simply apply directly to the surface and leave it to work.
REMOVES GREEN STAINING: This highly effective deck cleaner removes dirt, grease, and unsightly green staining from wood. It also works as an algae and lichen remover, ensuring your surfaces are left clean and fresh.
PREPARES WOOD FOR OILING: Use our wood Decking Cleaner before applying our Decking Stain or Decking Oil to open the wood pores, improving absorption for a long-lasting finish.
COVERAGE: One 5L bottle covers up to 25m² of garden decking, making it a cost-effective solution for cleaning large wooden surfaces.

5 Litre Concentrate Spray & Leave Cleaner - Patio Fencing Decking - Green Mould & Algae Killer

Free Shipping

Why We Love It

Effortless and powerful cleaning.
Prevents regrowth effectively.
Super concentrated and economical.

Main Highlights

✓ CLEANS WITH NO EFFORT: Jarder Spray And Leave Kills All Green Mould, Algae & Lichen With Ease, Without The Need For Scrubbing Or Pressure Washing! Simply Mix, Spray & Walk Away - Works Like Magic!
✓ SUPER CONCENTRATE: One 5 Litre Bottle Of Jarder Spray & Leave Makes A Minimum Of 30 Litres Of Solution Covering A Huge 240m² Area - Jarder Spray & Leave Is a Maximum Strength Super Concentrate Boasting 50% More Active Ingredient Than Other Brands!
✓ ALL HARD SURFACES: Perfect For Use On Patios, Decking, Fencing, Paths, Driveways, Roofs, Sheds, Greenhouses, Garden Statues, Terracotta Pots, UPVC Windows, Boats, Caravans, Motor Homes And All Indoor & Outdoor Hard Surfaces Affected By Green Mould and Algae.
✓ PREVENTS REGROWTH: Once Treated Results Will Show In 2-3 Days. Spray & Leave Penetrates Your Outdoor Surfaces Creating An Invisible Barrier Which Will Help To Prevent Re-Growth For Up To Six Months!
✓ SAFE & GUARANTEED RESULTS: Biodegradable PH8; Non-Caustic, No Acid & No Bleach! Jarder Spray & Leave Is Safe For Children & Pets Once The Area Is Dried. Prepare To Be Amazed!

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

Free Shipping

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

8.7

Excellent

We scanned 661 products

We reviewed these offers relevant to the Composite Decking Cleaner And Restorer within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like SmartSeal, HLS Supplies, Furniture Clinic, OWATROL, RUSTINS, Ronseal, Jarder, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Composite Decking Cleaner And Restorer in the market, we considered we took a deep dive into 3306 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is SmartSeal Deck Cleaner - Powerful And Efficient Composite Decking Cleaner & Fence Cleaner- No Pressure Washing - Concentrated Formula Decking Cleaner for Wood - Removes Algae Easily! (5 Litre). We love many things about this product by SmartSeal. What sets it apart from the competition is Revitalises and cleans decks effectively, Eliminates need for pressure washing, DIY, easy composite decking restoration.
The best value product for most shoppers and where user satisfaction is continuously the highest 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 based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Composite Decking Cleaner And Restorer and the best cost-to-value ratio is Rustins Composite Decking Cleaner - Effective Mold and Mildew Remover | Deep Cleaning Solution for Decks, Patios, and Outdoor Spaces 4 litreat RUSTINS with a % discount.
Our list of the best Composite Decking Cleaner And Restorer is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Composite Decking Cleaner And Restorer in The UK

Related Deals You Might Like for Composite Decking Cleaner And Restorer

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

Caravan King – Decking Cleaner – Cleans & Revives Decking, Fences & Patios, Removes Dirt, Algae, Grime & Mould, Wood & Composite Caravan Decking, 1L

PatioXpert - Decking Cleaner and Reviver 5L - Powerful Algae & Mould Remover | Outdoor Wood & Composite Deck Cleaner | Removes Dirt, Black Spots & Grease | Prepares Decking for Oils & Stains

GLEAN Door Restore Colour Reviver Aerosol | Restores Faded Surfaces | uPVC Restorer, Composite Door Colour Restorer, Fibreglass (GRP), Window & Decking Restore | 400ml

Ronseal DC Decking Cleaner 5 Litre

HLS Supplies 1L Composite Plastic Decking Aftercare - Deck Algae and Mould Remover - Green Stain Remover

HG UPVC Powerful Cleaner, Quick & Easy, For All Synthetics, Ideal for Doors & Window Frames, White - 500ml Spray

Shieldon Protects WOW cleaning spray for Composite and Conglomerate Sinks - Granite Composite Cleaner for Discoloration and Stains - Silgranit, Fragranit and Blanco - 500 ml

Caravan King – Decking Cleaner – Cleans & Revives Decking, Fences & Patios, Removes Dirt, Algae, Grime & Mould, Wood & Composite Caravan Decking, 5L

Thompsons UPVC Restorer 480ml

We scanned 661 products

We concluded that: