If you have an asphalt driveway, it has an estimated average lifespan of 15-25 years when maintained properly. But with constant exposure to the elements, such as sun, wind, salt, heat and cold, the asphalt can deteriorate quickly.
Investing in a seal coat will increase the lifespan of a paved driveway or parking lot by acting as a flexible barrier coating, shielding the asphalt from erosive factors. A seal coat on your driveway prevents essential oils in the asphalt from evaporating over time – causing the asphalt to become dry and brittle through oxidation. When the asphalt is too dry, it will crack and allow water to penetrate the surface of the driveway, creating even more erosion.
To avoid a very costly repair, you should have cracks repaired before they invade a large area of the pavement. If you’re unsure if you need a seal coat repair on your driveway or parking lot, check for any of the signs below:
- Discoloration of asphalt (fades from black to gray)
- Surface cracking that appears like peeling paint
- Hairline cracking
- Uneven wear of past seal coat
- 2-3 years since last seal
- Signs of over sealing
- Water standing too long on driveway
Other reasons to get a seal coat include the wear and tear caused by vehicles. Oil and gasoline drip will cause the asphalt in your driveway to crack and break down. Oil spots require a special coal tar sealant to prevent deterioration. This should be applied every 2-3 years.
There are many benefits of seal coat for pavement maintenance:
- Protect and extend the lifespan of your driveway or parking lot
- Prevents water from penetrating the surface which leads to cracking
- Protects against oxidization from the sun (paving materials become dry, brittle)
- Prevents erosion of asphalt
- Costs pennies a square foot compared to repairs
- Prevents oils and salt from breaking down the asphalt
- Aides water run off
- Limits pooling of water
- Slows down surface cracking
- Prevents slip and fall injuries
- Enhances the aesthetics and curbside appeal of property