Initial sealing should occur 6 to 12 months after the asphalt surface is laid to allow the pavement to “cure” so oils can escape and the surface becomes ready for sealer. The initial sealer application forms a barrier to prevent water penetration and to inhibit deterioration of the asphalt binder by oxidation and over-drying.
A typical, two-coat application of POLY-TAR will last roughly 3-7 years. Much depends on the customer preference regarding how fresh they want it to look. Factors that will affect how quickly the sealer wears are traffic volume, the “elements” and the original asphalt condition. Well-maintained asphalt that is sealed every 2-3 years will hold the seal longer and longer after each subsequent application.
Preventative maintenance is typically the most cost-effective solution and should be reapplied every two to three years.
In fact, several government and Asphalt Institute studies have shown that neglected asphalt pavement can cost up to five times as much to repair as asphalt that has had a regular maintenance program, including sealcoating.
