Enhancing Gel Liner for Long-Lasting and Waterproof Properties

Regarding your gel liner formula, the base formula is mixable, as confirmed by the staff. Also, regarding your question about Candelilla Wax and Microcrystalline Wax, they are indeed different types of waxes with distinct properties and melting points. Both are included in the original formula to achieve a specific texture, so it's recommended to use both as listed if you want to match the original formula's feel.

To make your gel liner long-lasting and waterproof, you can add a film-forming agent to the formula. These ingredients create a thin film on the skin after application, which helps the product adhere better and resist water.

Based on your formula which contains a high percentage of water, water-based film formers would be most compatible. Here are a couple of options:

• Flex Film (Water Base): This film former is specifically suitable for products applied to the skin like eye liner and provides moderate waterproof properties. It can be used at a rate of 10-15% in your formula. For enhanced waterproofness, it can be combined with Gloss Film (though Gloss Film was not among the top search results for this query, Flex Film alone offers moderate water resistance).

• Allianz OPT (Acrylates/C12-22 Alkyl Methacrylate Copolymer): This polymer provides water and wear resistance for long-lasting color cosmetics and works well in water-based systems like gels and low viscosity emulsions. It is typically used at a lower rate of 1-5%.

How to incorporate:

1. Choose one or both of the recommended film formers.
2. Determine the desired usage rate based on the level of longevity and waterproofness you want to achieve (start with the lower end of the suggested range and adjust in trials).
3. Reduce the percentage of Distilled Water in your formula by the exact amount of the film former(s) you add to keep the total percentage at 100%.
4. Mix the film former into the water phase of your formula.

For example, if you choose to add 10% Flex Film, you would reduce the Distilled Water from 70% to 60% and add 10% Flex Film.

Remember to perform small-scale trials to test the stability, texture, and performance of the modified formula before making a larger batch.