I got terrified last week when I visited my boat and found that the half gallon of the pink antifreeze stuff that I had not used was pretty solid *yks. Given that the temp then had not been below 10 F, and that the pink stuff label said it protects from freezing rupture at temperatures of -50F, I thought I had gotten a bad batch and I drove to the closest WM with the frozen "antifreeze" bottle. I was very surprised ( and pretty unhappy with myself) when I was told to read the small letter in the label stating that it protects to -50F only cupper pipes, but that it could damage plastic tubes or containers at much higher temperatures. In fact, a chart shows that slush begins to form at 12F, and a danger zone starts at temperatures below -10F. Well, this morning was -9F in my back-yard and the pink stuff was solid rock!!!! *cry. The label goes to say that for boats and RV's with plastic pipes and parts, they recommend the more expensive antifreeze protective up to -100F. I always used the -100F for protecting the engine raw water system, but based on the labels, it should be the other way around..... unless the temp keeps dropping *pop. What do you think about this? Is the label of -50F Marine/RV Antifreeze deceptive or what?. Yes, yes, yes, I should have read the small print in the label, but the mechanic that did al the boats next to mine told me that he always has used the pink stuff for winterizing the fresh water and head systems!!!!!.
