45% virgin propylene glycol with Hercules triple protection inhibitor package, pre-mixed with water, in a ready-to-use formulation. Undiluted, it provides freeze protection down to -20º F, a minimum fluid flow to -42º F, and burst protection to -80º F. Check dilution tables in Hercules spec sheet to obtain desired protections. Not for use in boilers with aluminum heat exchangers - see cryo-tek -100/AL on next page. Blue liquid.
