{HEAD ~ Conversely, a catalyst solution} consisting of {TAIL ~ 0.25%} by volume of catalyst engenders an approximate 15 second interval to completion of hardening 
consisting of
{ HEAD ~ Conversely , a catalyst solution } consisting of { TAIL ~ 0.25 % } by volume of catalyst engenders an approximate 15 second interval to completion of hardening
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH