Main function is to remove damp from the crack，improving sealants bond to the crack sidewall and increasing the durability of construction time. The unit is very popular, particular in the rain and frigid zone. In a few hours after the rain, without waiting for the road completely dry, it’s ready for construction after the unit deals with the sidewall. The unit produces high-pressure high-temperature gas in an instant to remove damp from the crack and form a cleaner and drier surface, which improves sealant bond to the sidewall. At the same time, it can soften the asphalt road surface to increase the bond strength for the effect of dust waterproof.
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