... 5mm. 2.0mm and so on Characteristics 1, The excellent anti-aging, in the long term light, humidity, cold use ... capable of sustaining a puncture of hard material, good anti-crack, high adaptability of the grass roots' contraction and the crack ... lifetime, high durability can achieve more than 25 years. 5, The cold construction operation, no environment pollution and simple operation. High quality EPDM ...