Rimmel London Stay Matte Powder 008 Cashmere. Rimmel London Stay Matte control unwanted shine with the Rimmel Stay Matte powder. This product effectively mattifies your skin without a dry feeling and ensures a perfect finish for up to 9 hours.. Characteristics:. sets your foundation and instantly mattifies skin. controls shine for up to 9 hours. minimises pore visibility. light texture perfectly blends into your skin. dermatologically tested. How to apply:. Use a sponge or a brush to apply the powder to the entire face and set your makeup. Pay special attention to the centre of your face – your forehead, nose, and chin. Reapply during the day as needed.