Diapex Plus Temporary Filling Material, Regular Kit. Diapex Plus presents the same reliable properties as Diapex. Diapex Plus is a versatile silicone-oil-based paste with blended calcium hydroxide and iodoform to provide sterilization benefits while enhancing radiopacity. Each Regular Kit contains 2 g of pre-mixed paste in a pre-filled syringe, 20 disposable tips, 1 silicone cap.