Originally Posted by
myoldyourgold
I am no expert but I would use 20% NaOH, no alcohol, and if that is not enough then add a small heater in the trunk and plug it in at night on a timmer. There is many small heaters made to plug in at night. I use one when I park out side in -40º F to keep the glue on the wood paneling from coming unglued. Alcohol in the reactor disappears very quickly and is not much use. The bubbler is where you will have a much bigger problem. The reactor at 20% NaOH at -20º C for a few hours just gets slushy at the worst and when turned on takes only about 5 to 10 minutes max to be normal in most reactors and a lot less is some.
The bubbler solution is a harder one. I am still testing an oil based liquid for the bubbler but do not have the final testing done yet, but it should be good to -30º C or colder. Alcohol in the bubbler helps but requires daily checking in cold weather because it gets used up.
Is your garage heated? If so your problem will only be when parked outside for a long time.