A water based 2-in -1 problem solving primer, that seals and binds surfaces as well as blocks common stains.
To get the best results make sure surfaces to be painted are sound, clean and dry (new surfaces particularly must be fully dry).
After suitable preparation apply 1 coat of Stain Block Plus to all bare or stained surfaces and allow to dry. Two coats will be necessary for difficult stains.
After use, remove as much paint as possible from brushes before cleaning with clean water