Asphalt-base sealers can provide that, but coal tar does a better job of both in the long term. With today's technology, we're not going to expect an asphalt-based sealer to go mile for mile with ...

"The asphalt base may be a little thinner or maybe the subsoil preparation is a little different than the highway so a small roller is there to do compaction but it's not used to get the real high ...

Base materials vary by region and can be crushed stone or “conbit” (recycled concrete and asphalt—it’s crushed and reused).