Jermaine - who finished second in British reality show "Celebrity Big Brother" last week - says the religion will protect Michael from "false" attacks.
Jermaine told the BBC Asian Network: "Michael needs to become a Muslim. I think it's a great protection for him from all the things that he's been attacked with, which are false."
"Michael has given conversion some serious thought."
Jermaine convinced Michael to leave the US after he was acquitted of child molestation charges and move to Bahrain.
He said: "There's a strength and protection in Bahrain."
"I was the reason he went there. I wanted him to get out of America and just go somewhere it's peaceful and quiet and people pray five times a day which is beautiful."
Jermaine says his faith kept him sane during his time on "Celebrity Big Brother" - where contestants lived in confined surroundings and were filmed 24 hours a day.
He revealed: "If I didn't have Allah and my prayer rug, I would not have survived and the reason why is because it kept me focused, it kept me calm."
Michael is reportedly planning to move to Europe to resurrect his pop career and hopes to release a new album in 2007.
