Crack filling is a fundamental maintenance procedure used to prolong the lifespan of asphalt pavements by addressing early signs of deterioration. This process involves the insertion of a high-quality, rubberized sealant into cracks in the pavement to prevent water and other damaging substances from penetrating deeper into the asphalt. The initial step in crack filling is a thorough cleaning of the cracks, which may include routing (widening and deepening) to create a clean, uniform channel that can hold the sealant. After cleaning, the sealant is applied, filling the cracks from the bottom up to ensure a tight, complete seal.

This technique is crucial for maintaining the integrity of the road surface, as it prevents the expansion of existing cracks and the formation of new ones, which can lead to more severe pavement failures like potholes. By implementing crack filling as part of a regular maintenance routine, property and roadway managers can substantially reduce the need for more extensive repairs and full pavement replacements, ultimately saving on long-term maintenance costs. Crack filling is relatively quick and cost-effective, greatly enhancing the durability and lifespan of asphalt surfaces with minimal impact on traffic.