The outspoken rocker slammed Rubin during a question-and-answer segment of his An Evening With Corey Taylor show in 2011, telling fans he would never work with the Def Jam co-founder again.
Rubin produced Slipknot's 2004 album Vol. 3: (The Subliminal Verses).
Taylor raged, "Rick Rubin showed up for 45 minutes a week. Yeah. Rick Rubin would then, during that 45 minutes, lay on a couch, have a mic brought in next to his face so he wouldn't have to f**king move. I swear to God. And then he would be, like, 'Play it for me'. The engineer would play it."
He added, "I respect what Rick Rubin has done in the past to get to where he is now, but the Rick Rubin of today is a thin, thin, thin shadow of the Rick Rubin that he was. He is overrated, he is overpaid, and I will never work with him again as long as I f**king live."
But now it seems Taylor has had a change of heart, telling Apple Music's Beats 1 radio DJ Zane Lowe, he was simply not used to working "that way".
"I was a young guy, I was also freshly sober, and being a singer and being sober: 'I need your attention, Rick! I need it!' Taylor said. "So that was me just being young, unsure of myself, needing the guidance... I was, basically, an open wound at that point that just needed to heal and I didn't have anybody there to kind of help me. So I blamed him a lot in retrospect, probably more than I really should have.
"I feel bad about it, and hopefully someday I'll be able to make some amends with him."