For the treatment of organic growth on exterior undecorated and all previously decorated masonry surfaces.
Apply liberally using a synthetic bristle brush and scrub well into the surface.
All surfaces must be sound, suitably dry and free from anything that will interfere with the adhesion of the materials to be applied.
Remove all loose, and failing or suspect material by scraping or brushing with a stiff bristle brush (not wire) to a sound edge. Remove all organic growth by scraping or brushing with a stiff bristle brush (not wire). Heavy long established growth is best removed by pressure washing between 1500-2000 psi (102-136 bar), wet or dry grit blasting.
Care must be taken not to damage the underlying surface. The spores must the be killed with a application of Sandtex Trade Fungicide diluted one volume of Fungicide with up to two volumes clean water. Leave for 24 hours and rinse with clean water. Allow to dry.
Do not apply if there is a risk of rain or frost, use as a paint additive, mix with other chemicals, or apply by power spray machines. Sandtex Fungicide is a surface treatment and does not provide preservation properties to any substrate.
Use our paint calculator to work out how much you need
Enter the dimensions of your walls, details of any gaps like windows and doors, and click calculate
Remember: It's probably better to have a bit too much than to order too little!
This is based on a coverage of 10m² per litre of paint and one coat of paint.
Make sure you always check the coverage on the product page before purchasing and, if covering a dark or bright colour, you may need two or three coats.