A water-based acrylic emulsion, which can be used straight from the bottle or thinned with water 1:1 to seal most surfaces. Atelier Binder Medium can be used as a sizing on canvas or cotton duck to seal the surface and prevent absorption of paint into the fabric. Mix with paint to dilute colour without losing intensity. Use neat between dry paint layers to seal or mix with Atelier Interactive for fast drying acrylic techniques.