Practically every D-Sub can be made IP67 compatible, but mainly the most common versions are the Density D-Sub connectors and the Power D-Sub connectors. The waterproof seal is made up of a O-ring on the mating side that is made of silicon, and on the back side of the connector a sealing compound made of epoxy prevent water to pass through or next to the pins and the mounting parts.
IP67 according to IEC 60529, tested by SGS.
Even though the waterproof connector locks a bit different its still the same connector and the same specifications apply as for a standard connector. in order to make a completely waterproof connector a waterproof hood is used from the cable side.
Contact service for more details on the waterproof connectors.