Is heat sink compound the same as dielectric grease?

[ThurzNite]

I have a tube of RadioShack silicon base heatsink compound (#276-1372). Is it the same as Dielectric grease? I need some dielectric grease for my car's bulbs. thanx!
Jae

 

[Agamar]

I wouldn't think it would be the same. Just buy you some real dielectric from autozone