Goldwell Kerasilk Control Humidity Barrier Spray results in silky perfection to win back control. Long-lasting transformation into perfectly smooth and soft hair for up to 3-5 months. The Kerasilk KeraTransform Technology™ (KT3) fuses the power of three ingredients to deliver beautiful hair transformations. All Kerasilk Control products contain the segment specific ingredient Glyoxylic Acid, Modified Keratin and Color Caring Silk.