Wet & Forget (Australia) Pty Ltd

'Meridian Building'

C4/15 Narabang Way

Belrose NSW 2085

Wet & Forget (Australia) Pty Ltd

'Meridian Building'

C4/15 Narabang Way

Belrose NSW 2085

Wet & Forget

The original bleach-free moss, mould, lichen and algae remover.
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Wet & Forget Concentrate


The original Wet & Forget concentrate is the ultimate outdoor moss, mould, lichen and algae remover that is safe to use on any exterior surface. It kills problem spores and helps stop premature regrowth of unwanted biological growth.  


How it works

The original Wet & Forget concentrate has a unique combination of biodegradable selective fungicides to target moss, mould, lichen, algae, and general biological growth. When diluted with water and applied to a dry surface, it immediately attacks the growth. These fungicides work in conjunction with a carefully selected range of surfactants to help loosen and lift biological growth, and then Mother Nature takes over. The weathering process gently removes the decomposing growth over time without damaging the surface it has infested. 



The Wet & Forget concentrate:

  • Contains no bleach or chlorine, and is non-caustic and non-acidic.
  • Is an easy, do-it-yourself application.
  • Requires no scrubbing or water blasting.
  • Has a PH of 8 (Pure water has a PH of 7).
  • Is non-systemic and is biodegradable.
  • Dilutes into your garden sprayer.
  • 5L bottle covers a minimum of 100sq metres (it makes 30L of product).
  • Has an unlimited shelf life both in its concentrate form and when made up in a garden sprayer.
  • Kills problem spores at the source and helps prevent premature regrowth.


Instructions for use

  • Sweep all leaves, dirt and other debris off the surface before application to allow for maximum penetration of the active ingredients. 
  • Dilute one part Wet & Forget to five parts water (1:5) in a garden or backpack sprayer. 
  • Spray the affected area to the point of saturation. Do not hose off. 
  • Apply during overcast, dry conditions to avoid accelerated evaporation. 
  • Do not apply if rain is expected in the next 6 hours. 
  • Lichen requires a second application within 15 minutes of the first. 
  • Keep children and pets off the wet area until dry (normally 1-2 hours).
  • If badly contaminated, apply a second application one month after the first. 


Reaction Time

  • Algae will disappear within days. 
  • Moss will turn brown within a few days and other light growth will decompose within a few weeks. 
  • Black mould will noticeably improve within 4-6 months, however if the area is heavily contaminated it will take 6-12 months. 
  • Lichen requires two applications within 15 minutes of each other and will take 8-12 months to decompose. 


*Note: it is normal for some treated surfaces to turn an orange/brown colour after application. This discoloration indicates a good result, however it is not permanent and will soon disappear. 



  • You cannot use the original Wet & Forget concentrate (blue) with the Rapid Application hose-end nozzle (pink). It will not work as the dilution rates are different!

If you are applying Wet & Forget to your roof - click here for our easy tips.

If you are applying Wet & Forget to your tennis court - click here for our easy tips.


Benefits of Using Wet & Forget

No special equipment required to apply Wet & Forget. Easy to maintain, after the first application always re-apply at the first sign of recontamination.

Eliminates Harsh Methods

Wet & Forget helps prevent the damage caused by the harsh scouring of scrubbing and waterblasting.

No Special Equipment

Just dilute Wet & Forget into a garden sprayer.

Residual Effect

Some of the ingredients remain active if the surface is porous. This helps prevent premature recontamination.

Unlimited Shelf Life

Unlike bleach based cleaners, Wet & Forget has an unlimited shelf life.




Before & After


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