No water needed - self adhesive. Easy to apply and remove. Sheet includes 3/8 dia. circles, 1/2" dia circles and 3/8" x 1 1/4" rectangle. Printed on skin safe medical adhesive tape. stays on until you remove it. Clear polyethylene surgical tape and removable medical adhesive tape. It is hypo allergenic. Note: Not recommended for sensitive skin. Backer explains what it is, how to use it, where to use it. Backing imprint with white is recommended. White must be priced as a color.