Quick view Douglas Products Douglas HTF Inhibited Propylene Glycol MSRP: kr6.115 - kr32.044 Douglas HTF Inhibited Propylene Glycol in 1 Gallon Containers Recommended for: Block Ice MachinesCirculating Beer SystemsClosed Water Loop Refrigeration SystemWood Boiler SystemClosed Loop... MSRP: kr6.115 - kr32.044 Quick Add Add to Wish list