asphalt mastic[′a‚sfȯlt ′mas·tik]
A mixture of asphalt with sand, asbestos, crushed rock, or similar material; used like cement. Also known as mastic asphalt.
asphaltic mastic, mastic asphalt
A viscous mixture of asphalt and a filler material such as fine sand or asbestos; hardens when exposed to air; used as an adhesive, as a sealant at joints, and in waterproofing.