Yes, you could add a few drops of the A side you are using into the bottle and try to thin in down a little but unfortunately that is the nature of the black dye. If you are using the 1 oz bottle, either cut the tip or simply remove the tip by holding the bottle in one hand and with a rubber glove, or I just use a paper towel, push the tip to the side and it will come right out of the bottle. Then you can simply dip a popsicle stick in the bottle to get extract the amount you need. If you add A side to it, only use a little bit and shake it extremely well. This will dilute the concentration a very small amount ... normally not enough to notice as the black dye is very concentrated.
mike, i didnt realize it would be as thick as peanut butter. i did cut off the top and pull out what i need. i am casting 1/25 scale stock car tires, and although it's thick, it sure beats painting tires. and it gives it a slight sheen like a new tire. thanks for the info