I would like to offer another point of view considering that the moderator of this forum is primarily a manufacturer of coal tar based sealer I am quite sure that he will gravitate towards recommending his product.
I manufacture an asphalt based product and all I can say is that the contractors that have tried it never go back to coal tar. We don’t use coal tar pitch so there is none of the skin burning or fumes that you get with the coal tar based sealers. We also add the aggregate (a specially processed stone product) during that manufacturing process so that you don’t have to incur the trouble or expense.
The high solid content holds up as well as coal tars but is cheaper and easier to use.
