Chef Alan Williams was engaging in bondage style sex with two men when he was wrapped in the film and covered in PVC, with only holes for his nose and mouth.
During the session in August, Williams, who had a long term girlfriend but occasionally used gay sex sites, suffered a massive heart attack.
The man died in a flat in Dover, Kent
A Post Mortem revealed he had taken horse tranquilliser ketamine and then engaged in sex with two men in the flat in Dover, Kent.
His body overheated, with the PVC preventing it from cooling itself, resulting in a heart attack.
The two men involved in the incident, Richard Bowler, 35, and David Connor, 23, deny manslaughter.