I wasn't exactly sure what this product was when I bought it, but I was looking for something that would keep acrylics from drying on the tip of my airbrush so quickly, which leads to paint splattering. It seems to work perfectly, so I've been adding it to my airbrush cup regularly. It doesn't work like a thinner, so I'm not exactly sure what it is, but the longer I can keep airbrushing acrylics, it's doing it's job

Found I didn't really need this for short jobs but for larger work I've used it. Helps keep airbrush from clogging.

Great product and really helps when airbrushing Vallejo paints. I place 1-2 drops in the paint cup before adding paint and thinner. Stir with a brush and start airbrushing.