Whitlam/Plumb-Pro has announced that its Select-Unyte thread sealing compound has been approved for use on natural gas, propane, LP gas and butane by the Canada Standards Association (CSA). Select-Unyte produces a leak-proof seal on all types of metal and plastic threaded connections. It also carries the National Sanitation Foundation (NSF) seal under NSF Standard 14 and NSF Standard 61 and the Underwriters Laboratories of Canada (ULC) Listed Pipe Joint Compound, Form 1 Issue No. 1351.