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When concrete roads are poured, it is important that transverse and longitudinal joints be cut while the concrete is still green in order to control where the concrete cracks. Though necessary, these cuts create a penetration point for water that needs to be sealed to prevent damage to the road base. While there are many types of sealants, some of the most effective are hot-pour, asphalt based sealants. Maxwell Products manufactures several hot-pour sealants well suited for use in concrete joints that meet or exceed the relevant industry standard specifications.
The most common type of concrete sealants used conform to the ASTM D 6690 Type II specification. Also used, though less frequently, are ASTM D 6690 Type I and Type IV (AASHTO designation is AASHTO M 324 Types I – IV).