How to Clean and Remove Lichen

Bio-Shield® Cleans and Removes Lichen from any Exterior Surface.

Lichen causes severe damage to protective and decorative coatings and is extremely difficult to remove with pressure cleaning or scrubbing alone. Pressure cleaning is expensive, uses 3000 to 5000L of water for 4 hours of work and is simply not effective as the lichen will begin to regrow immediately from the residue left behind.
The best way to remove all lichens is to apply Bio-Shield - this will kill the entire lichen growth and clean up the surface, without pressure cleaning or scrubbing and keep it clean for extended periods at a fraction of the cost of pressure cleaning

  • Easy spray-on application - A single saturation coat is effective.
  • No Pressure Cleaning or Scrubbing is needed.
  • Bio-Shield® protects from algae and lichen regrowth
Bio-Shield - Clean and Remove Lichen
Bio-Shield  Lichen Damage on Colorsteel Roof

The Best Way to Remove Lichen - with Bio-Shield®

Follow these 3 simple steps to ensure a complete kill and removal of the lichen, and long lasting protection

  • Ensure the lichen is dry or slightly damp before application
  • Apply the Bio-Shield to saturate the lichen and stay wet for 10 to 15 minutes
  • Allow the treated surface to dry for 2 to 4 hours before rain

The key to successfully cleaning and removing lichen is to apply the Bio-Shield solution to saturate the lichen through to the base of the growths, and ensuring it does not dry out to quickly. Aim to allow drying over 10 to 15 minutes to ensure the Bio-Shield gives a good kill. Application on a cloudy day or early morning will assist.
You will notice a slight color change in most lichens once Bio-Shield is applied as it penetrates and kills the lichen.

The main reason other outdoor cleaners fail to kill lichen is the application has not saturated the growth and it is drying out to quickly.

Once the lichen has been killed it will breakdown and be washed away by rain over a 3 to 12 month period.
No pressure cleaning or scrubbing is needed to remove the lichen.

A surface treated with Bio-Shield will stay clean for 2 to 3 years in ideal conditons.
Re-apply the Bio-Shield at the first sign of regrowth for a fast clean up and to keep the treated surface clean.

Jet-Stream 7.5L

What is Lichen?

Lichen is an organism composed of algae or cyanobacteria (or both) living among the filaments of a fungus in a relationship that benefits each growth.  Lichen prefers alternate wet and dry conditions and will grow on any exterior surface from alpine to sea level environments.
Lichen secretes a mild acid to breakdown the substrate it grows on. Lichen on Colorbond  destroys the high quality protective coating, exposing the base steel to rust and expensive repairs.

We’ve been using Bio Shield for a few years with great results controlling the lichen build up on our roof tiles.
It’s a great product. It’s good to know there’s companies out there that actually deliver on their promises.
Barry. Sydney July 2023

Specific Application Instructions for common surfaces that lichen grows on.

How to kill lichen and clean Coloursteel, Colourbond and Colourcote roofs
 How to kill lichen and clean, Decrabond, Gerard and Asphalt shingle roofs
 How to kill lichen and clean a clay tile roof