Toyota Prius Owner's Manual page 546

5-2. Steps to take in an emergency
Before performing emergency repair
Check the degree of the tire damage.
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A tire should only be repaired
with the emergency tire puncture
repair kit if the damage is caused
by a nail or screw passing
through the tire tread.
• Do not remove the nail or
screw from the tire. Removing
the object may widen the
opening and prevent emer-
gency repair with the repair kit.
• To avoid sealant leakage,
move the vehicle until the area
of the puncture, if known, is
positioned at the top of the
tire.