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What Is A Cape Seal? A cape seal is a two-part surface treatment most frequently used on asphalt pavements. It starts with a chip seal and is finished with a slurry seal placed on top of the finished chip seal. The term “cape” is derived from Cape Province of South Africa where this process was developed. A cape seal retains the benefits of both the chip and slurry seals and eliminates some key drawbacks of each. o The chip seal has greater ability to seal the pavement and existing cracks in the pavement o The chip seal has greater flexibility and better resistance to cracking. o The slurry seal “topping” fills in the gaps between the chips to hold them in place better and create a smoother surface. This makes the cape seal more friendly to the urban environment. When a Cape Seal is done, it looks very similar to, if not exactly the same as a simple slurry seal, but there is much more to it.
Why Use A
Cape Seal? Providing greater and more durable sealing of the asphalt pavements to protect them from oxidation. Keeping water out of the pavement structure by providing greater and more durable sealing of minor to moderate cracks Increasing the ability of the pavement to continue performing under higher levels of flexing. Improves smoothness of the pavement surface. Increases traffic safety and skid resistance A Cape Seal can be used to treat more severe levels of pavement failure if: The existing pavement structure still has a sound base that is well-drained and has not deformed significantly. The existing pavement structure still has enough remaining strength to retain its shape under the traffic loads it experiences. |
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