Retarder Medium is added to delay drying time of acrylic paint; mix a few drops with the color, or dip brush into retarder on the palette. This additive will not change paint consistency. Useful for “wet on wet” techniques and reducing "skin" formation on the palette.
Packaged in plastic 17ml dropper bottles.
I didn't get a chance to use it, but the delivery, and packaging was perfect. Also, you can tell that the retarder medium is brand new and not sitting in a shelf for a long time.