Look for a cosmetic chemist with specific OTC drug and sun-care experience, not just a general skincare formulator. They need to know FDA's permitted UV filter list, water-resistance testing protocols, and aerosol compatibility. The AJ Cosmo Labs iOS app lets you post a detailed formulation brief and receive responses from pre-vetted sun-care formulators — typically faster than cold outreach on LinkedIn or freelance platforms.
Read the full guide on how to find a formulator for waterproof sunscreen spray →