CITROEN C-ZERO Handbook page 94

In the event of a breakdown
2. Sealant bottle for the temporary repair of
a tyre.
3. Injection hose.
4. Suction hose, to extract the sealant if
necessary.
5. Bag containing a spare valve core, a tool
for removing/refitting the valve core, and
a speed limit sticker.
The speed limit sticker must be affixed to
the vehicle's steering wheel to remind you
that a wheel is in temporary use.
Do not exceed a speed of 50 mph
(80 km/h) when driving with a tyre repaired
using this type of kit.
92
Repair procedure
Sealing
F Switch off the ignition.
F Make a mark on the provided speed limit
sticker to identify which wheel needs
repairing, and affix it to the vehicle's
steering wheel to remind you that a wheel is
in temporary use.
F Shake the bottle of sealant, remove the cap
and screw on the injection hose.
Avoid removing any foreign bodies which
have penetrated into the tyre.
https://www.automotive-manuals.net/
F Remove the valve cap from the tyre to be
repaired.
F Unscrew the valve core using the removing/
refitting tool, and keep it in a clean place.
F Connect the injection hose to the valve of
the tyre to be repaired.
F Press on the sealant bottle (turned upside
down) several times with the hand in order
to inject the entire content into the tyre.