The Sennelier Acrylic Binding Medium is made with pure acrylic resin and 46% dry extract. Its use is identical to that of caparol binding medium. This medium is a glossy, transparent product suitable for interior and exterior use with better stability in water than the caparol based products. The less methyl-cellulose binding medium used to prepare the pigments, the more the acrylic colour will be water resistant when dry.