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Durability is an important aspect of clayshale stability. Previous research has shown that cement stabilization is found effectively carried out to improve it. Soil stabilization studies show the importance of the stabilization method studied in addition to dry mixing as the most commonly used. Stabilization methods affect durability as indicated by the durability index. This paper presents the results of the investigation of clayshale durability stabilized with cement by dry and spray pulverizing and tested by the wetting-drying cycle in the slaking test. Two types of specimens used are compacted cylinders measuring 1.35inch in diameter and 1.35inch in height and compacted cylinders then broken into 40-60g weight fragments according to ASTM standard. The cement content were varied from 2 to 10 percent by weight of the dry soil. The results showed that the durability index of the spray-pulverized method was higher than dry-pulverized.