Protect the user against any expected or unexpected attack. Sprinkle in room or on self. Use liberally.
Place by all windows and doors. Use before a circle, when you need to secure yourself or an area. Restrains all hexes and attacks.
Aids in keeping out hexes you have just removed. Helps to clear out the left over negative feelings. Keeps you immune to reoccurring nasties.
If you are concerned about the trip home keep a small pouch of it with you as you journey abroad.