Star brite ® Wintersafe -50 Degree Fahrenheit (-46 Degree Celsius) Non-Toxic Antifreeze provides excellent cold weather and corrosion protection for drinking water systems and all engines at an attractive price. Its premium additive package prevents corrosion of aluminum, copper, brass and solder, but will not harm rubber, seals or hose materials. The 3X-died pink color provides excellent blow-through visibility. Formulated with virgin, non-toxic USP-grade ingredients. It contains no alcohols. This product is ready-to-use; do not dilute it. Star brite ® Wintersafe Non-Toxic Antifreeze will provide burst protection to -50 Degree Fahrenheit (-46 Degree Celsius) and freeze protection within a range of +14 Degree Fahrenheit to +18 Degree Fahrenheit (-10 Degree Celsius to -8 Degree Celsius). When testing with a refractometer or with a hydrometer designed for use with PG, freeze point readings on the PG scale will range from +14 Degree Fahrenheit to +18 Degree Fahrenheit . When winterizing water systems with plastic pipes in regions where temperatures can fall below -10 Degree Fahrenheit (-23 Degree Celsius), we recommend using Star brite ® -100 Degree Fahrenheit (-73 Degree Celsius) Non-Toxic Antifreeze.