Imports In 2017, British Indian Ocean Territory imported $4.82k in Bituminous mix, mastic from asphalt, bitumen/tar/pitc, becoming the 0th largest importer of Bituminous mix, mastic from asphalt, bitumen/tar/pitc in the world. At the same year, Bituminous mix, mastic from asphalt, bitumen/tar/pitc was the 0th most imported product in British Indian Ocean Territory. British Indian Ocean Territory imports Bituminous mix, mastic from asphalt, bitumen/tar/pitc primarily from: N/A.