Watch the video here: https://www.abbeysupply.com/airsoft-products/Abbey_Predator_Maintenance_Gas_144a.html
It's not for skirmishing, has a higher amount of lubricant so it's best not to put too much of it through the hop rubber. It's really only required if you have stored your mags with no gas in or used a very dry gas or propane all of which can contribute to your seals drying out.