Provides burst protection down to -50 degrees Fahrenheit. Contains corrosion inhibitors that protect all engine components and seals. The most effective way to protect your water system from freezing up during winter storage. 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-dyed pink color provides excellent blow-through visibility. The virgin Propylene Glycol (28% blend) formula is tasteless and contains no alcohol. This product is ready-to-use; do not dilute it. Provides burst protection to -50 degrees F (-46 degrees C) and freeze protection within a range of +14 degrees F to +18 Degree F (-10 degrees C to -8 degrees C). 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 degrees F to +18 degrees F.