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Deck Cleaner - Powerful Moss & Algae remover for wooden decking (Available in 5 & 25 Litre)

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Customer Reviews

I used the deck cleaner undiluted as my deck was bad. It worked really well but I think it is an expensive product. Not sure if ordinary bleach may have had a similar effect. Anyway I have now finished with the deck protector which I have used before and can highly recommend. My deck look great now.

By Edward Davis From Maldon Essex

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A high performance deck 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 works as a is a powerful moss remover & 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
  • Algae remover for decking
  • No need for pressure washing
  • Easy DIY application

Deck Cleaner from Smartseal is a very powerful moss and algae remover.

Once the decking is clean, use Liberon Decking Oil in a clear finish to really enhance the look and appearance of the wood.


  • 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.