Special Joint Sealant For Pavement Crack Repair Product Introduction This type of joint sealant takes modified petroleum asphalt as its base material, and its performance is optimized by adding modifiers such as SBS and waste rubber powder. It is mostly hot-melt type and black in block shape, with a conventional specification of 12.5kg per piece. It is currently the most used product in highway maintenance scenarios, suitable for daily crack maintenance operations on ordinary