During the application of Fotomask, brushes will become sticky and they should therefore be occasionally cleaned in this solution to keep them pliable. After using brushes to apply Fotomask they should be cleaned in this solution by inserting the brush into the can of brush cleaner. Do not decant the cleaner but rinse the brush in the can remembering to replace the cap immediately after use. Do not use the Brush Cleaner to dilute Fotomask as this will prevent it stripping. CAUTION - Both these products are highly flammable and must not be used near open flames or in confined spaces. Replace caps when not in use.