Crack sealing is an essential maintenance practice that extends the life of asphalt surfaces by preventing water infiltration and further deterioration. Proper assessment ensures effective crack sealing, reducing costly repairs. Here are the best practices for evaluating asphalt cracks before sealing.
1. Identify the Crack Type
Understanding the type of crack helps determine the best sealing method.
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Hairline Cracks – Small surface cracks that may not require sealing unless they widen.
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Transverse Cracks – Perpendicular to traffic flow, often caused by temperature changes.
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Longitudinal Cracks – Run parallel to traffic, typically due to asphalt aging or joint failure.
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Alligator Cracking – A series of interconnected cracks indicating structural failure, requiring more than just sealing.
2. Measure Crack Width and Depth
Crack size determines the appropriate sealant and application method.
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Less than ¼ inch – May not require sealing unless widening.
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¼ to 1 inch – Suitable for crack sealing with hot or cold-applied crack filler.
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Greater than 1 inch – Often requires patching or more extensive repair.
3. Assess Moisture and Debris Levels
For effective adhesion, cracks should be dry and free from dirt, vegetation, and debris. Use compressed air, wire brushes, or heat lances to clean the cracks before applying sealant.
4. Choose the Right Sealant
Selecting the correct sealant ensures long-lasting repairs.
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Cold-Applied Crack Fillers – Ideal for quick repairs and lower-traffic areas.
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Hot-Applied Crack Sealants – Provide superior adhesion and flexibility for high-traffic areas.
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Rubberized Sealants – Flexible, ideal for cracks prone to expansion and contraction.
5. Evaluate Weather Conditions
Crack sealing should be performed in dry weather with temperatures above 50°F for optimal adhesion and curing.
6. Inspect Previous Repairs
Review previously sealed cracks to identify failures or areas needing retreatment. Regular inspections help prevent minor cracks from becoming major issues.
Maintain Your Asphalt with Proper Crack Sealing
Regular crack sealing extends the lifespan of asphalt surfaces and prevents costly repairs.
For high-quality asphalt crack fillers, sealcoating equipment, and asphalt maintenance supplies, trust Asphalt Sealcoating Supply Inc. Contact us today at 304-916-6117!