ii) providing an asphalt cross linking {TAIL ~ agent blend} comprising at least one cross linking {HEAD ~ agent} and a second asphalt, wherein said asphalt cross linking agent blend is prepared by mixing the at least one cross linking agent into the second asphalt at a temperature of about 120 to about 200° C., for about 0.2 to about 3.0 hours 
ii ) providing an asphalt cross linking { TAIL ~ agent blend } comprising at least one cross linking { HEAD ~ agent } and a second asphalt , wherein said asphalt cross linking agent blend is prepared by mixing the at least one cross linking agent into the second asphalt at a temperature of about 120 to about 200 ° C. , for about 0.2 to about 3.0 hours
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH