A fast acting anti-fungal pre-treatment to be used prior to painting. Biowash has been specially formulated with powerful broad spectrum biocides and fungicides combined with detergent properties to keep exterior surfaces free from a wide variety of microbial activity. A ready to use solution, the product can be applied on masonry, brick, plaster and wood. Low in toxicity. Biowash maintains its stability in high temperatures (upto 100 degrees C) and a pH range of 2 – 12.