The Montana Tarblack 500ml Low Pressure. Bitumen based, the Montana Tarblack 500ml has been newly developed and reformulated. It comes equipped with the Fat cap White-Pink for tight wide lines however is compatible with the 1-5 level cap system, apply it however you want or need. This innovative new tool allows you to use TAR Black in "Skinny mode" for the first time. Engineered to also allow optimal performance with skinny caps for the clean application of outlines and details. Winterproof! Optimal performance in cold climate.