Yes, sealing asphalt cracks is generally recommended for several reasons:

Prevent Water Damage: Water is one of the primary enemies of asphalt. When water seeps into cracks, it can penetrate the pavement layers, leading to erosion and weakening of the base. Sealing cracks helps prevent water from infiltrating the pavement structure, thus reducing the risk of damage caused by freeze-thaw cycles and moisture.

Prevent Further Deterioration: Cracks left untreated can widen over time due to traffic load and weathering. By sealing cracks when they are small, you can prevent them from expanding into larger, more costly problems.Enhance Longevity: Proper maintenance, including crack sealing, can extend the lifespan of asphalt pavement. By addressing cracks early on, you can delay the need for more extensive repairs or pavement replacement.

Improve Aesthetics: Sealing cracks can also improve the appearance of asphalt surfaces, making them look smoother and well-maintained.

However, it's important to note that crack sealing is most effective when done correctly and at the right time. Proper preparation of the crack, selection of appropriate sealing materials, and application techniques are essential for achieving satisfactory results. Additionally, for larger cracks or extensive damage, it may be necessary to consult with a professional contractor for repair or resurfacing options.

Crack filling and crack sealing are two distinct methods used in asphalt pavement maintenance, each serving a different purpose:

Crack Filling: Crack filling involves the application of hot or cold liquid asphalt-based sealants into cracks in the pavement surface. These sealants are typically rubberized and designed to fill the crack entirely, preventing water infiltration and the intrusion of debris .Crack filling is generally used for narrow, shallow cracks typically less than 1/4 inch wide. It's most effective for preventing water penetration and further deterioration of the pavement surface .This method is relatively quick and less expensive compared to crack sealing, but it's not suitable for wider or deeper cracks.

Crack Sealing: Crack sealing is a more comprehensive approach that involves the application of specialized sealants into cracks in the pavement surface. These sealants are designed to adhere to the crack walls and create a waterproof barrier, preventing moisture from penetrating into the pavement layers. Crack sealing is typically used for wider and deeper cracks, generally ranging from 1/4 inch to 1 inch wide. It's effective for preventing the expansion of cracks and preserving the structural integrity of the pavement. This method is more involved and often requires specialized equipment for proper application. It is generally more durable and longer-lasting compared to crack filling.

In summary, crack filling is used for narrower and shallower cracks to prevent water infiltration and debris accumulation, while crack sealing is employed for wider and deeper cracks to create a waterproof barrier and preserve the pavement's structural integrity. Both methods are important aspects of asphalt pavement maintenance and help prolong the lifespan of the pavement surface.

The frequency of crack sealing for a parking lot depends on various factors, including the climate, traffic volume, pavement condition, and the quality of previous maintenance. However, as a general guideline, crack sealing is typically recommended every 2 to 5 years for asphalt parking lots. Here are some factors to consider when determining the frequency of crack sealing:

Climate: In regions with extreme temperature fluctuations and frequent freeze-thaw cycles, cracks are more prone to develop and expand rapidly. Therefore, parking lots in such areas may require more frequent crack sealing to prevent water infiltration and pavement damage.

Traffic Volume: High-traffic parking lots experience more wear and tear, leading to accelerated crack formation and deterioration. Areas subjected to heavy vehicle loads, such as entrances, exits, and drive lanes, may require more frequent crack sealing to maintain pavement integrity.

Pavement Condition: Regular inspections of the parking lot should be conducted to identify new cracks or existing cracks that have widened. Crack sealing should be performed promptly to prevent further deterioration and costly repairs.Previous Maintenance: The effectiveness of previous crack sealing efforts and overall pavement maintenance practices can influence the frequency of future crack sealing. Well-maintained parking lots with a history of proactive maintenance may require less frequent crack sealing compared to neglected ones.

Budget and Resources: Budget constraints and resource availability may also impact the frequency of crack sealing. While crack sealing is essential for pavement preservation, the timing and extent of maintenance activities should be balanced with available resources.

Ultimately, it's essential to develop a proactive pavement maintenance plan tailored to the specific needs of the parking lot. Regular inspections, routine maintenance, and timely crack sealing can help extend the lifespan of the pavement, minimize repair costs, and ensure a safe and functional parking area for visitors. Consulting with asphalt maintenance professionals can also provide valuable insights into the optimal crack sealing schedule for your parking lot.