Recommended Usage Percentage of Cyclopentasiloxane in Sunscreen Formulas

The recommended usage percentage for Cyclopentasiloxane (Low-Odor Cyclomethicone) (ID: 171) in a sunscreen formulation depends on the desired texture and the type of formula:

1. For standard emulsion-based sunscreens (creams/lotions):

   • Typical Range: 1% to 10%
   • Function: At this level, it acts as a lightweight carrier, helping to dissolve and spread UV filters evenly. It also improves the texture, reducing the stickiness and greasiness often associated with sunscreens, and leaving a silky, soft feel on the skin.

2. For anhydrous (water-free) formulas (e.g., silicone-based primers, light fluid sunscreens, or sunscreen sticks):

   • Higher Concentration: It can be used at much higher concentrations, often ranging from 10% up to 50% or more, as it serves as the primary solvent and base for the formula.

Recommendation:
For a typical sunscreen lotion or cream, start with a concentration of 3% to 5% and adjust based on the desired skin feel. If you are aiming for a very light, non-greasy, and quick-drying formula, you may increase the percentage.