Bill Tindall, E.Tn.
From the MSDS sheet it is more like 10% solids. The only chemical nonvolatile is the diisocyanate (nasty stuff). Its 50% dimethyl ether! Flammable!!! This stuff sets the bar for flammable, well , maybe not as flammable as natural gas.
What does 2K mean?
It is just an aliphatic urethane. Won't yellow.