The former couple split in January after seven-years of marriage, and the 38-year-old supermodel is apparently keen to make sure he keeps quiet about their time together.
A source told the Daily Star newspaper: "She has asked attorneys to build a lifetime clause into their agreement prohibiting either of them from talking about their marriage."
Seal opened up about their separation on The Ellen DeGeneres Show soon after the announcement, telling the host: "You just grow apart after a while. She is still, in my opinion, the most wonderful woman in the world. I think our priority was to remain civil and do this thing with dignity. We still very much love each other."
Some kind of reason
"To say that neither of us were grieving would be an out and out lie, and I don't mind telling you that. I think the operative here is that we are civil to each other and we both have a tremendous amount of respect and love and we try and do this with as much dignity as we possibly can."
And while Heidi has remained tight-lipped about the split, Seal believes the public deserved to be given some kind of reason.
He told Australian radio station 2Day FM: "While they don't really have the right to know details of our private life, I felt that those people at least had a right to some kind of explanation.
"When you publicise your marriage as much as our marriage was publicised, when you renew wedding vows, when you do all those things you are giving them a picture of an ideal relationship, of a relationship that people aspire towards, so when it goes south you can't all of a sudden take the philosophy of Celestine monk and decide to go for a vow of silence, it doesn't really work like that."
24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.
Kris Jenner's sister Karen Houghton claims life in the spotlight has changed the showbiz matriarch. Read More »
Tori Spelling has insisted she had a "very, very good" sex life with Dean McDermott before he cheated on her. Read More »
She hasn't used deodorant in 20 years!
Haley Joel Osment is all grown up!
Look what Elana Afrika showed off!
Beatenberg will join 30 Seconds tour!
Kate and William drop some sick beats!
12 pics of Prince William and Duchess Kate!
New great pics of baby Prince George!
20 new pics of Kate and William.
South AfricaTiger BrandsMarket Related
South AfricaDiscovery ITMarket Related
South AfricaCity PressMarket Related
HousesR 5 900 000
HousesR 22 000 000
HousesR 1 900 000