I'd think fishy, based on the label.
FWIW, Kester's own documentation (MSDS), the formula is as follows:
N-Butyl Acetate 5 - 10% by weight
Proprietary Ingredients 1 - 5% by weight
Non Hazardous 1 - 5% by weight
Ethanol 30 – 60% by weight
Isopropyl Alcohol 10 - 30% by weight
Methanol 5 - 10% by weight
Granted, there may actually be some rosin in it, falling in the "Proprietary Ingredients" section, but 951 is stated as No-Clean, not rosin/RMA.
Hope this helps.
