Flow and Leveling Additive – Open Time Extender. Zinsser’s Latex Extender is a safe, biodegradable additive designed for latex paints and primers. It can be used for: latex paints and primers, water reducible oil/alkyds, water-based stains, waterborne DTM finishes, water-based varnishes and waterborne epoxies.

• Eliminates brush and roller marks
• Improves paint flow and levelling
• Ideal for paints & primers
• Won’t change topcoat colour, sheen or flexibility; water-based