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Lignum Decking Cleaner and Protector 5L Concentrate

£10.80 Ex VAT
£12.96 Inc VAT
Out of stock

Clean your garden decking with this powerful deck cleaner. Ideal for making old timber decking and outdoor hard surfaces look like new.

Deck Cleaner Concentrate

Lignum decking cleaner is a highly concentrated cleaning agent for removing unsightly green growth, moss and algae from wooden decking and furniture. This quality deck cleaner also provides protection against re-growth for up to nine months after application. 

Uses of decking cleaner

As well as being perfect for use before re-staining or refinishing garden decking, Lignum decking cleaner and protector can also be used across a wide range of hard surfaces. Any surface that is prone to green algae, lichen or mould mildew can be treated, including: 

  • Timber decking
  • Wooden garden furniture
  • Fences (read our guide to painting fences)
  • Flag stones
  • Roof tiles
  • Concrete surfaces

How to use decking cleaner

Start by diluting the deck cleaner – you can see the recommended dilution rates below. The deck cleaner is easy to apply – it can be applied by brush, watering can or sprayer. 

You should leave your timber for 1-3 days. During this time the green growth will disappear. 

Note: Heavily soiled surfaces may require a second application. 

For more information on application, read our guide on How to Treat Decking.

Dilution rate 

For removal of algae, mould or mildew mix 1 litre of super concentrate to 9 litres of clean water. Apply 1 litre of diluted cleaner between 2.5 - 5 square metre by brush or sprayer. Areas of heavy growth, dilute 1 litre of super concentrate to 4 litres of clean water. 

General cleaning with Lignum decking cleaner

This decking cleaner is also suitable as a general purpose cleaner. Simply apply the diluted product to the required surface by either pouring or spraying. Scrub the surface with a stiff brush and leave for 10 - 15 minutes. Scrub the surface a second time then hose / wash down until all cleaner has washed away. 

Tips & Important Information

Do not apply if rain is expected within four hours of application.  

If a decorative coating is to be applied to a cleaned wood surface, the surface must be rinsed off with water first. You should do this a minimum of 24 hours after treatment.

Permagard – Providing Solutions. Inspiring Confidence. 

If you want additional information on deck cleaning products or to confirm that you have the best deck cleaner for your needs then contact our expert team on 0117 982 3282. You can also browse our timber treatments and garden wood treatments.


  • Removes green algae, mould & mildew
  • Protects against re-growth for up to nine months
  • Removes dirt & grime
  • Suitable for any timber surface e.g. fences, garden furniture etc
  • No pressure washing, no scrubbing or rinsing
  • Super concentrate treats up to 250 square metres
  • General purpose cleaner
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