Antifreeze Comparison Chart
| Product Name | Oral Toxicity | Corrosion Inhibitors | Operating Range | Color | |
|---|---|---|---|---|---|
| Ethylene Glycol | DOWTHERM SR-1 | Moderate | Yes | -60F to 250F (-51C to 121C) |
Fluorescent Pink |
| Food Grade Propylene Glycol | DOWFROST | Lowest - FDA Cleared Safe for Accidental Ingestion |
Yes, but less effective since ingredients are food safe | -50F to 250F (-46C to 121C) |
Colorless / Water White |
| Propylene Glycol | DOWFROST HD | Low | Yes | -50F to 325F (-46C to 163C) |
Bright Yellow / Green |
Summary (All Propylene Glycol Properties Listed on Product Pages, See Below)
DOWFROST™ GEO 20 Inhibited Propylene Glycol heat transfer fluid includes a specially designed package of industrial corrosion inhibitors. Propylene glycol antifreeze solutions have an operating temperature range of -50°F to 325° F (-46° C to 163° C), and the antifreeze is dyed bright yellow in color to aid in leak detection.
In applications where toxicity is a concern, propylene glycol fluid is used because of its low acute oral toxicity vs. the moderate acute oral toxicity of ethylene glycol. If you do not require food grade glycol (lowest oral toxicity), we recommend DOWFROST HD or DOWFROST GEO 20 as it provides superior corrosion protection and low oral toxicity. If you require the lowest possible toxicity available, choose DOWFROST antifreeze (non-toxic antifreeze).
