Protect sanitation and water systems against freeze damage during winter layup.This propylene glycol/alcohol blend is excellent for winter layup of freshwater and sanitation systems. Ready to use, with no mixing required. Provides -50F burst protection when used full strength. Not recommended for engine storage. -50F rating is based on freeze/burst temperature for copper pipe.Key FeaturesProvides cold weather protection for drinking water tanks and systems, and holding tanksAlcohol and PG formula will not harm aluminum, copper, brass or solderBright pink colorReady to use; do not diluteBurst protection to -50F (-46C) Antifreeze 101