Surfaces must be clean, dry and free of all dust, grease, oil, wax, excessive chalky material and other surface contamination, which may affect adhesion.
Remove all loose and flaking material back to a sound surface by sanding and scraping.
Wash surface with SOAPCLEAN or other suitable cleaning agent, NOT washing-up detergent.
Treat and remove any mould with a suitable mould killer.
Remove as much of the stain as possible by washing, sanding scraping etc.
Application
Use as is. Do not dilute.
Stir well before and during use
Apply 1 or 2 coats of PRIMALL depending on the condition of the surface and the severity of the stain.