Water Resistance of Volatile Silicones and Isododecane

Asked by: donotgiveup12345601 On: August 19, 2016 Product Type: Cosmetics Answered

Question

How do volatile silicones like Trisiloxane and Isododecane contribute to water resistance in a formulation, and does this water resistance last after they evaporate?

Answer

Based on the forum discussion:

  • Evaporation Rate: Trisiloxane and Isododecane have similar evaporation rates. Trisiloxane evaporates faster initially but slows down over time, while Isododecane evaporates slightly slower initially but maintains a more consistent rate until it's gone.
  • Water Resistance: Both Trisiloxane (as a silicone) and Isododecane help make formulations water-resistant. However, this water resistance is provided while they are present in the formula. Once these volatile ingredients evaporate completely, the water resistance they contributed will be lost.