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UK Manufactured
since 2008
Product Reviews
By Terry Gibbs

Great easy professional decking cleaner product that ticks all the boxes.Will definitely purchase again.

By James Cain

Great stuff

By James Cain

Great stuff

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Decking Cleaner - Fast & Easy

Wooden Garden Furniture NO PRESSURE WASHING Will Not Damage Timber. Removes LICHEN, ALGAE, MOULD & DIRT

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Product Description


A high performance deck cleaner and wood cleaner that will quickly remove lichen, algae, moss and dirt from decking and other external wooden surfaces. There is no need for pressure washing, which can 'stripe' the wood, leaving permanent marks. Deck Cleaner is also a powerful moss remover, composite decking cleaner and algae remover for decking and garden furniture.

Deck Cleaner contains a potent biocide and other active elements that will quickly kill off algae, lichen and other organic matter. Deck Cleaner will quickly remove moss & algae fast decked areas on gardens & patios.

Most ingrained dirt and grime will be removed after one application, although a second application may be necessary to get a 'good as new' look.


  • Cleans decking fast
  • Powerful moss remover
  • Composite decking cleaner
  • Algae remover for decking
  • No need for pressure washing
  • Easy DIY application

The wood cleaner and composite decking cleaner from Smartseal is a very powerful moss and algae remover.

The non-acidic formulation can safely be used to clean all types of wood and garden furniture. The powerful formula will not damage plastic pool liners, natural stone, concrete or other materials which may be close to the decking you are cleaning. It is also very easy to use and can be applied easily with a sprayer or watering can. After application, you simply rinse it with water and the decking should look totally clean again and free from moss, dirt and algae.

  • Dilute 1:1 with water and apply by sprayer or watering can.
  • Work in with a brush or stiff broom and leave on the surface for 1-2 hours
  • Rinse with clean water
  • Repeat process if necessary
  • Coverage: Up to 40m² per 5 litre container when diluted 1:1

    Use appropriate safety wear as Deck Cleaner can damage skin on contact. See the SDS (Safety Data Sheet) for further information.

    Product FAQs

    Q: Can this be used on roof terrace decking? Will it damage any roofing materials?

    Shy B

    A: We are not aware of any roofing materials this cleaner will damage. If unsure, always test in an inconspicous area first.

    Response from Nick

    Q: Can you use on wet surfaces or when rain is due? What are the best weather conditions for using it?

    Philip Wheat

    A: Using on a wet surface will dilute the formulation. It is best to use in dry conditions in temperatures between 10-20 degrees. If the temperature is too warm, the decking cleaning might simply evaporate.

    Response from Alex

    Q: Would your Deck Cleaner product be ok to use on my decking as I have treated it with decking stain to give it colour. Many thanks.


    A: The decking cleaner should not cause any damage to the decking stain.

    Response from Nick
    Ask Us A Question
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    We provide a national delivery service for our block paving sealer, pattern imprinted concrete sealer, roof coatings and tarmac restorer on a standard 2 - 4 working day basis. Dependent on weight, this is normally done by pallet or parcel carrier.

    If you need products delivered quicker, for a small additional charge, orders placed before 1.30pm can be delivered within 1 - 2 working days to most parts of the UK, although this is dependent on the courier service in your area and the product/s ordered. If you require this service, please check on area availability by calling 01268 722500.

    Our commitment is to supply all orders as placed and we offer a comprehensive guarantee of quality. Providing a reliable delivery service to all our customers is most important to us and this is backed up by the many satisfied customer testimonials we have received over the years.

    If you need an order delivered to a different address, left somewhere at your property without a signature or left with a neighbour, just let us know.

    We also try to maintain 100% stocking levels of our products at all times, so an immediate despatch is virtually guaranteed.

    Our product returns policy can be viewed by visiting our Terms and Conditions section.

    *Free delivery on orders over £75 are subject to the delivery address location.

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