Clear Tar Gel has a pully, tar-like feel, but in a clear, colorless gel. This extremely resinous and stringy consistency
makes it feel very different from other acrylic gels. Useful for generating fine detailed lines by "dripping" it over surfaces, as it continuously flows from palette knives
or other tools. It blends well with all GOLDEN Acrylic colors, although Fluid Colors work best

source: goldenpaints.com