Crack sealing has proven to be the lowest cost pavement preservation treatment available. The crack sealants are formulated to perform in specific climates, elevations, slopes, and traffic conditions. They are typically used on early stage longitudinal cracks, transverse cracks, reflection cracks and block cracks. Crack seal products are used to fill individual pavement cracks to prevent entry of water or other non-compressible substances such as sand, dirt, rocks or weeds. Crack sealants need to stay flexible to move with the pavement’s movement, this is beneficial for active cracks that continue to extend in size and severity over time.