Milk Paint Bonding Agent helps Milk Paint adhere to pieces that already have a finish on them. Without bonding agent, there is a chance that Milk Paint will chip & peel in a rustic fashion. This Bonding Agent is a water-based concentrated acrylic emulsion. How to use this product:Shake well before using. For optimum adhesion, clean the surface to be painted with our Pre-Paint Cleaner and sand lightly to rough up the surface. Always test adhesion before applying to a large area. To use with Milk Paint: Mix one part of bonding agent to two parts of milk paint already mixed. For an even stronger grip, mix in equal parts. Mix the bonding agent with all coats of paint for optimum adhesion.To use as a primer for water-based paints: Apply a thin layer of bonding agent with a paint brush or roller. Let dry for 2 hours before applying paint.This product contains no solvents of VOC and is almost odorless. Clean brushes and tools with warm, soapy water. Protect from freezing.