PEL-FIX 123-S facilitates the penetration semi-permanent dyes and temporary hair colors into the hair shaft. It then improves the substantivity of those materials with a cationic silicone polymer. PEL-FIX 123-S allows for the uniform deposition of colors on the hair, even damaged hair. PEL-FIX 123-S is a blend of sorbitol, propylene glycol and Quaternium-80, a quaternary functional polydimethylsiloxane. Sorbitol and propylene glycol swell the hair shaft and allow penetration by the Quaternium-80 which retards the loss of color. Additionally Quaternium-80 is an excellent hair conditioning active.