Not sealing it will only make it more susceptible to damage from the elements and other things. Sealcoating can effectively protect your driveway from rain, hail, snow or oil. It will give you a water-resistant surface, protecting you from the elements. Your driveway is also protected from the sun's damaging UV rays.
The Drawbacks of Seal Coating
There are some drawbacks to sealcoating, however. One is that it can be messy and difficult to apply evenly. It's also important to note that sealants will not repair significant damage to your driveway; they will only protect it from further damage.
He added that sealing a driveway could yield unwanted consequences: Oil from the bitumen (the black glue that holds the asphalt together) will be tracked into the home, or the sealant could wear away unevenly, making the surface look as if it's peeling.
When sealcoating is used as part of a preventative maintenance program, it can extend the life of your driveway by up to 20 years on average.
The main benefit of driveway sealing, however, is protection from the elements. By protecting your driveway from the sun, water and chemicals, you can greatly extend the life of your pavement. A newly sealed driveway can also be easier to keep clean.
Seal coating allows for a smoother, crack-free driveway, and because smoother pavements extend pavement life by as much as 10% to 25%, you won't have to worry about replacement or repairs for a much longer period of time.
Sealcoating not only extends the life of your asphalt pavement, but it's also an effective way to save money. Unprotected asphalt leads to cracks and potholes which will cost you more in repairs.
Sealcoating is not designed to be an asphalt crack filler, it is made for sealing the surface and protecting it from the elements such as UV light, salts and oils. It is not flexible enough to fill a crack without re-cracking and it does not have adhesion quality's that Asphalt Crack Filler has.
We recommend that you have your asphalt driveway resealed every 2-3 years at maximum. Waiting any longer could result in faster deterioration of your pavement. And doing it too often (i.e. annually) could result in chipping and flaking.
There Are Cracks or Holes in the Surface
Another sign that your driveway needs to be sealed is cracks or holes in the surface. These can be caused by several things, such as tree roots, weather damage, or normal wear and tear. If you notice any cracks or holes, it's important to have them repaired as soon as possible.
While slathering seal coat over asphalt in a thick layer can be tempting, a “more is better” approach is detrimental to the pavement beneath. Too much sealer can lead to premature cracking, which will shorten the lifespan of your driveway.
Rain can wash away all of the hard work that you put into your driveway. The sealer will be washed away by the rain if you don't wait long enough for it to dry.
It also prevents water from turning hairline cracks into bigger ones. The aggregate in the mix enhances traction, acts as a wear layer, and fills small cracks. Also, sealcoating gives the driveway a uniform black color.”
Sealers, particularly solvent-based sealers, will darken concrete. If unevenly applied, it will create light areas where there is less sealer, and darker areas where there's more. If applied by sprayer, it may appear like “stripes”.
Rain and Sealcoating
Sealcoating application and drying do not pair well with rainy or even misty conditions. Rain prevents the coating from drying. Depending on how heavily the rain falls, it could also wash away the sealcoating from the surface before it has had enough time to dry.
You'll get the best results if you take the time to repair cracks in the surface of the driveway before applying a final coat of sealant. For cracks less than 1/2 inch, use a bottle of crack filler.
Filling Cracks
As we noted above, filling in cracks costs between $1 and $3 per linear foot. However, a professional will charge a minimum service fee to diagnose and repair asphalt driveways. And so, you'll pay an average of $100 to $400 for crack repair on your whole driveway, depending on the severity.
The best time to sealcoat your driveway is during summer when the temperature is above 50 degrees Fahrenheit. It's not advisable to seal coat in the winter as the colder season will negatively affect the performance of the sealer. The sealer may not bond with the asphalt or will not cure correctly.
How many coats of sealer should be applied? Low Traffic such as a typical home driveway, 1 coat is sufficient. Moderate Traffic on a parking lot, 2 coats with a third coat on the entrance and exits. Heavy Traffic 2 coats with a third coat on all travel lanes and roadways.
The Best Weather for Sealcoating is Warm and Dry
If there is any rain in the forecast for the day of the scheduled sealcoating, it should be delayed until the forecast shows no rain. The best weather for sealcoating is relatively arid conditions combined with a temperature between 50 and 85 degrees Fahrenheit.
Oil-based sealer is petroleum based mixture of asphaltic chemicals. One main problem with oil-based sealer is that you cannot add sand to the mixture for traction which can leave your driveway very slick/slippery.
While sealing a driveway can be done with hand tools like shovels and push brooms, it's faster and easier with a few pieces of outdoor power equipment like a string trimmer, blower and pressure washer. It's also smart to wear old shoes, safety glasses, and a pair of gloves you won't mind parting with.