The Showgear electric cannon is a single use cannon, prefilled with streamers.
To fire an electric cannon, the Showtec FX Shot (60908) is required.
The bottom part of the cannon contains a pressurized nitrogen cartridge for a powerful effect.
Given the resistance to ignition, use of these products in sensible amounts can be regarded as fire safe.
This is based on experience of TNO and Flame Guard b.v. (member of AFG Group).