The urethane prepolymer is the reaction product of {TAIL ~ a dihydroxy functional polyol} and {HEAD ~ an isocyanate} 
The urethane prepolymer is the reaction product of { TAIL ~ a dihydroxy functional polyol } and { HEAD ~ an isocyanate }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD