Everbuild 404 Fungicidal Wash is a powerful, fungicidal wash for the removal of lichens, fungi and algae on all mineral surfaces such as walls, paths, roofs, drives etc. It is effective on most surfaces and also leaves a residual surface to help prevent further infestation. Features: - Internal and external use.- Fast acting.- Leaves a residual surface to prevent future infestation.- Powerful formula. Registered with HSE under Control of Pesticides Regulations; 1986 (HSE 7183).- Kills mould caused by damp on internal and external floors and walls.- Kills mould growth on roofs prior to coating with bituminous coatings.- Removes algae from patios/drives.