Clean the surface if necessary. Do not use soap or other synthetic detergent. Then spay with nozzle the surface well with a dose of 1 liter Bio-Guard on 50 liters of clear-water.
The loose algae are discharged by a rain. When it is very dry, rinse the surface with water.
In case of stubborn attack and porous material use a slightly higher concentration or repeat the treatment.
All our products are manufactured in-house according to strict standards.
The Algae killers have been developed with the leading manufacturers and laboratories in the field of bacteria and biocides in the world.