The most common problem with asphalt tennis courts is cracking. Cracking is caused, in part, by asphalt's natural tendency to shrink as it weathers and ages. In addition, asphalt loses its flexibility and becomes more brittle over time. Since outdoor tennis courts are also exposed to temperature extremes that cause expansion and contraction, cracking is inevitable almost without exception. Quality design and construction may minimize or delay cracking but it cannot completely eliminate it. Once cracks appear, it may be impossible to repair their cause, but it is not impossible to repair the cracks themselves with the ARMOR® Crack Repair System. The ARMOR® Crack Repair System utilizes a knitted fabric that will expand as the crack widens. The secret to making this repair work is how it is purposely NOT bonded to the court in the vicinity of the crack, thereby allowing more of the fabric to absorb any movement or growth of the crack without the fabric tearing or delaminating from the surface. Thus, the reason why the ARMOR® Crack Repair System works so well is that it effectively spreads the stress of the crack over a wide area of expandable fabric-other brand name repair "systems" do not do this. Although your tennis court is technically still cracked, the filled cracks are hidden beneath our repair and then covered over completely with color-coating materials. Although it will not prevent cracks from developing elsewhere on the court, or prevent cracks from growing in length out beyond the repair, the ARMOR® Crack Repair System successfully keeps repaired structural cracks from reappearing on the surface. There are some limitations and not all cracks are repairable with our product, so talk to your contractor about your specific court. Most contractors simply install crack filler or put fiberglass fabric over the cracks. Almost without exception, both of these very common repair techniques will fail within one year, thus wasting both time and money. By using the ARMOR® Crack Repair System, your investment will last much longer than one season. See our brochure detailing up to 14 years of longevity.