Quick view Douglas Products Douglas HTF Inhibited Propylene Glycol MSRP: K168.57 - K883.41 Douglas HTF Inhibited Propylene Glycol in 1 Gallon Containers Recommended for: Block Ice MachinesCirculating Beer SystemsClosed Water Loop Refrigeration SystemWood Boiler SystemClosed Loop... MSRP: K168.57 - K883.41 Quick Add Add to Wish list