GP-20 is a clear, slightly dense cosmetic fluid that is used as an ingredient in many cosmetic applications as a moisturizer, emollient and humectant. Primarily used as a thickening agent for platinum silicone.
For makeup artists, it has many uses. You can add moisture or shine to products without an oily or sticky feeling. You can use it to thin foundation, as a mixing medium for cake foundations, or even to make a full-coverage foundation in a pinch!