Cyclomethicone 20% in Sunscreen with Light Cream Maker: Emulsification and Stability Issues
Question
I am formulating a sunscreen (SPF 49 ++++) and plan to include 20% Cyclomethicone. I intend to use Light Cream Maker™ as the emulsifier. Will this combination be stable, or will there be issues with emulsification and separation?
Answer
# Adding Cyclomethicone to Sunscreen Formula
Adding 20% Cyclomethicone to your sunscreen formula (SPF 49 ++++) is likely too high for Light Cream Maker™ to effectively emulsify and stabilize the formula.
Based on the product information for Light Cream Maker™, it is recommended that the silicone content in the formula should not exceed 10% when using silicones like Cyclomethicone. Adding 20% Cyclomethicone significantly exceeds this recommended limit.
As the staff previously mentioned, a high proportion of oil and silicone in a formula can lead to separation. While increasing the amount of Light Cream Maker™ can help to a certain extent, there is a limit to its capacity to emulsify high levels of oil and silicone. At 20% Cyclomethicone, it is probable that even increasing Light Cream Maker™ will not be sufficient to create a stable cream.
To achieve a stable formula, you may need to reduce the percentage of Cyclomethicone or consider using an emulsifier that is specifically designed to handle higher oil and silicone loads.
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