From Brant's Asphalt:
Seal Coating Material Used: SealMasters ECO-FRIENDLY PMM (Polymer Modified MasterSeal)
We DO NOT recommend using our product on ANY driveway that was EVER sealed with illegal oil-based sealers.
Excessive dirt/overgrown grass/moss can result in improper adhesion. These are may not adhere properly, no matter how well we clean. The areas may hold moisture underneath.
Tire marks are normal. Will wear away over time (up to a month).
Keep vehicles off a minimum of 24 hours. The longer the better, up to 5+ days if possible.
Brushed on around garage/concrete etc.
Alligator cracks are areas where numerous distinctive cracks are present. These areas often resemble a cracked egg or an alligators skin.
Alligator cracking in asphalt pavement is a sign of a failure under the asphalt surface. Filling in the alligator cracks with a patching product only offers a temporary repair solution. Any area with alligator cracks should be sawcut and removed and the base should be inspected and corrected depending on what is found.
Crack discoloration after sealcoating is a common issue that arises when water comes up through the pavement where cracks or pavement failure is occurring. As the days get warmer, the sun heats up the pavement and draws the moisture back to the surface. If you have your parking lot sealcoated and notice that the cracks, alligatored areas or low spots in the pavement have a discoloration of the sealer, typically brown or white, that is due to the sealer re-emulsifying. In other words, the sealer reabsorbs the water.
Sealer cannot form its film if there is constant water present. We do mix additives into our sealer mixture that can help reduce some staining, but remember this is not a sealer problem, this is a water problem. The optimum solution is to patch and repair those alligatored areas where pavement failure is occurring.
Because of the depth of the cracks, we cannot guarantee the crack filler/tar will not sink. However, after completion we will revisit all cracks and add additional tar where the cracks may have sunk.
"Rust Spots" - These are common in the area due to crushed stone aggregate used in asphalt containing irons. Iron oxidizes and forms rust spots/streaks on the surface. It is hard to determine how it will show after Seal Coating. It may become more visible because of the “new black look” making it more visible. On the other hand, it may cover it up completely and eliminate the sight of it for a length of time.
From our Supplier (SealMaster):
Question: What is sealcoating?
Answer: SealMaster® pavement sealers are designed to protect and beautify your asphalt driveway or parking lot. Sealcoating prevents oxidation of the asphaltic binder, prevents weather damage, reduces maintenance costs, and adds years of life to the pavement.
Question: When should an asphalt sealer be applied?
Answer: New asphalt should cure a minimum of 30 to 60 days. Once the asphalt is free from oils and sufficiently cured you can apply the sealer.
Question: At what temperatures should seal coat be applied?
Answer: You must have 50 degrees and rising for a 24 hour period.
Question: How long should we keep vehicles off the surface after sealing?
Answer: Please give the seal coat 24 hours after the final coat to cure prior to opening back up to traffic.
Question: How should the asphalt be prepared before sealcoating?
Answer: Surfaces must be clean and free from all loose dirt and material.
Question: How is asphalt sealer applied?
Answer: Pavement sealer can be applied by brush, squeegee, or specialized spray equipment.
Question: What are the coverage rates for SealMaster® sealer?
Answer: Coverage rates will vary based on the product. Follow the specification sheets for application rates.
Question: Are SealMaster® products safe for anyone to use?
Answer: SealMaster® offers water-based asphaltic products and acrylic products that are environmentally and user-friendly.