Impervius Charm

Impervius Charm
Incantation	Impervius (im-PUR-vee-us)
Type	Charm
Hand movement	Tap target
Light	None
Effect	Repels water and mist

"There! They'll repel water!"

— Hermione

The Impervius Charm (Impervius) was a charm that caused an artefact to become waterproof or allow someone better sight in bad weather conditions by preventing the rain from hitting their faces. The charm could also be used to repel mist.

Known uses

Caster(s)	Date	Notes
Hermione Granger	1993-1994 school year	Hermione used this spell to make Harry's glasses repel water during a rainy Quidditch match in their third year.
	1 May, 1998	Hermione used this in an attempt to protect herself, Ron Weasley, Bogrod, and Griphook from the burning, multiplying treasure in the vault.
Gryffindor Quidditch team	1995-1996 school year	The entire Gryffindor team used it on their faces to try to practise in a driving rain, but they still gave up after an hour.

Know practitioners

• Alicia Spinnet
• Angelina Johnson
• Fred Weasley
• George Weasley
• Harry Potter
• Hermione Granger
• Katie Bell
• Ronald Weasley

Etymology

The incantation is derived from the English word "impervious", which means "not allowing something to pass through" or "not penetrable".

Behind the scenes

• This does not have any effect on solid objects, as noted when Hermione Granger attempted to defend herself and her comrades against the cascading and burning treasures in the Lestrange Vault.
• The charm may also be related to the Imperturbable Charm, an enchantment used to completely block everything out of a given area for a certain period of time, including sound and presumably water.
• In the Harry Potter films and video games, Harry and other Quidditch players use Quidditch Goggles to protect their eyes instead.

Appearances

• Harry Potter and the Prisoner of Azkaban
• Harry Potter and the Order of the Phoenix
• Harry Potter and the Deathly Hallows