Where crack sealing is not a suitable method of preventive maintenance, other forms of pavement preservation should be considered. Table 3.28 is provided for quantity esti- mation. The table is based on a unit material weight of 63 lb/ft3 (1000 kg/m3), and does not account for waste or spillage. This table is applicable for crack sealing materi- als meeting the requirements of ASTM D-6690.