Hello all. Went into the rv today to check things out. Pretty cold around here, about zero at night. Anyway, did not use all of the rv antifreeze I had bought so a new unopened jug was on the floor next to the driver seat. I went to move it and it was frozen !!! Yep I mean solid. Product is Dow Bio-Friendly RV Anti-Freeze with Dow Frost RVR, and it is labeled to protect to -50 deg. Curious if anyone else has had this type of problem, never used anti-freeze before and if it "freezes" won't it expand and damage pipes etc.?