arctic silver or arctic alumina?

[karlosk98]

what´s the difference between arctic silver epoxi and arctic alumina epoxi?

Which is better for attaching luxeons to heatsinks?

Thanks.

 

[orionlion82]

arctic silver is straight thermal paste/grease (among the best out there)

Alumina is a heat conductive epoxy adhesive, iirc.

 

[ginaz]

how well do other epoxies such as jb weld conduct heat?

 

[CodeOfLight]

Nope. They are both epoxies. Arctic silver is supposed to be marginally better. But at the film thicknesses we use, it would make no difference.

 

[carbine15]

arctic silver comes in paste and epoxy forms. Arctic alumina does too so you have to specify thermal grease or thermal adheisive. Both work very well, but I've had better luck with alumina for more electrical insulating.