[JRTJH]

Last year I bought 6 gallons of CAMCO Artic Ban anitfreeze on sale at ACE Hardware. The price was $3.99 a gallon with a $2 rebate per gallon, so it cost $1.99 a gallon after rebate. It's rated to -50F and is a mixture of Ethyl Alcohol, Glycol, Denaturants, Colorant and water.

While I am not certain of this, I'd say that most likely, all RV Antifreeze that's rated at -50F is probalby very close to the same mixture of ingredients. As with most products, manufacturers add their "special ingredient" to maintain a competetive edge. By that I mean some add fragrance, some add a chemical to help "freshen" the tank next spring, some add a lubricant to "protect pumps" and some may add other things to catch your "fancy" when comparing jugs on the shelf.

As Festus indicated and as others have said, as long as it protects to the temps you expect to see in your area, they're all pretty much the same.