"I told them not to stay separately and work together for the benefit of all of us," Patekar said on a television show.
Raj, late Shiv Sena supremo Bal Thackeray's nephew, separated from the Shiv Sena in 2006 to form the Maharashtra Navnirman Sena (MNS).
The 62-year-old said he considered Bal Thackeray as a father figure, but he never gave the actor a ticket from his party. He, however, ruled out joining active politics.
Patekar said he had an equally good relationship with both NCP chief Sharad Pawar and UPA chairperson Sonia Gandhi.
"The reason being that I never sought favours from either of them till date, otherwise friendship ends," he said.
The national-award-winning actor's latest film 'The Attacks of 26/11' released on Friday.
Directed by Ram Gopal Varma, the film has Patekar in the role of Rakesh Maria, Joint Commissioner of Police (Crime).
Megastar Amitabh Bachchan had written to him praising the film. "I am happy that a senior colleague has liked it. But coming back to tha main point, this is not a movie. There are no songs and dances that will entertain. And that is one reason why I am a part of this movie. This film gives a message and is also an experience...
"This is not an incident to be happy about. It's a horrible incident, which we would ideally prefer to forget. I will not like to call it a documentation. What is being said through this film is said though a certain character played by me in the film," he said of the film depicting the November 2008 Mumbai attack in which 166 people were killed.
The actor denied media reports that the Indian police has been portrayed in the movie as helpless, surrendering before Pakistani terrorists. "It's a false charge."