Is epoxy better than spackling compound to riddle cracks surrounded by walls inside house? I have crack contained by my wall above a wall furnace that...

I have crack contained by my wall above a wall furnace that I've filled previously with spackling compound, but it's cracked again. I suspect since it's right above the furnace, that quantity of the wall is subject to changes surrounded by temperature (expansion, etc). I've never tried using epoxy. Is that any better than using spackling compound? The cracks aren't awfully wide, but they are rightly long (longest one is about 20 inches). Thank you for your backing!
Does it result in any injure to your...
Answers:    I would'nt use epoxy. Use Joint compound but be sure to use joint cartridge underneath or it will definately keep cracking. The pooled tape should stop the cracking within the future.