I have only used a dot of each product, to do a skin swatch test. Only bought a couple of days ago. I will make sure to seal both products before sending. All MyHairdresser Colour and Developer are resealable and reusable. . As long as you SPECIALITY IS: High Lift Blonde. Natural Beige Reflects. Toning. To use alone or mix with another Colour. 100% Grey Coverage.