Stone Mastic Asphalt (SMA) is a high strength material that produces a surface that in many instances out-performs that of traditional Hot Rolled Asphalt  and pre-coated chippings. 6mm SMA is particularly suited to house drives and car parks where it is more resistant to the scuffing action of vehicles turning in confined spaces.

Check out the Wikipedia page for further info.

Posted in: 1. Tarmac