Tubing insulation + antifreeze

[JohannM]

What would be the best way to insulate 1/2ID tubing. prefferably something with a thin wall thickness. A friend of mine who is a plumber brought some stuff over used to insulate warm water copper pipes but the wall thickness is rediculous. I dont matter what it costs

Also, Ill proppably be running liquid that will reach sub zero or close to zero temps, what will be the best additive to ensure it does not freeze?

Thansk in advance

[David]

What would be the best way to insulate 1/2ID tubing. prefferably something with a thin wall thickness. A friend of mine who is a plumber brought some stuff over used to insulate warm water copper pipes but the wall thickness is rediculous. I dont matter what it costs

Also, Ill proppably be running liquid that will reach sub zero or close to zero temps, what will be the best additive to ensure it does not freeze?

Thansk in advance

What liquid are you using? From my rusty Chemistry knowledge (studying Chemistry but summer always tends to wipe my memory :-P) you want something that interferes with the intermolecular bonding in the liquid you are using. For example, antifreeze interferes with Hydrogen Bonding in water thus stopping it from forming ice.

[L337 M33P]

What would be the best way to insulate 1/2ID tubing. prefferably something with a thin wall thickness. A friend of mine who is a plumber brought some stuff over used to insulate warm water copper pipes but the wall thickness is rediculous. I dont matter what it costs

Also, Ill proppably be running liquid that will reach sub zero or close to zero temps, what will be the best additive to ensure it does not freeze?

Thansk in advance

Ordinary neoprene pipe insulation + cable ties is the norm. It is thick but that's the idea - it will get ice on the outside if it's not thick enough.

As for antifreeze? Calcium Chloride brine but it tends to uh eat copper alive. Most people use ethylene glycol (car antifreeze) but be warned that it gets gooey at lower temperatures. Methanol alcohol is poisonous but keeps the solution at a low viscocity - so if you don't mind going blind for your overclock... :D

[LabRat23]

A 40% solution of isopropyl (the kind not as likely to kill you) will get you down to -20C.

The thick stuff might be a pain but it is necessary.