Thermal Compounds for Cartridge Heater

Long story short. Old extruder had ceramic stuff when I built my Prusa i2. Ceramic stuff cracked when trying to rebuild extruder because it jammed. Time for an upgrade. I've machined a simple aluminum block with possible expansion for a thermocouple. I need to find thermal compound for use with cartridge heater to ensure excellent heat transfer with no hot spots. Know any companies that supply a reasonable size tube?

I am not going to swear it works but in preparation for my next hotend I bought a tube of high temp RTV silicone it's suppose to be good to 343c.

[www.permatex.com]

+1 for silicone. It's widely available at electronics stores (Best Buy, Radio Shack) and you can pick up a gram of heat sink compund for less than $2 . It's the same thing used on the heat sink in your computers CPU. Something like this: [www.ebay.com]

I got a package of 'Firegum' and it's the version that can handle high temperatures.

Quite a neat product, when you apply it and then heat up your hotend, the material cooks off and becomes a ceramic-like hard material!

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http://www.marinusdebeer.nl/