A realistic timeline is 9–18 months. Formulation takes 6–14 weeks; accelerated stability testing takes 12–16 weeks; in-vivo SPF testing adds 8–12 weeks; and regulatory documentation and manufacturing setup add more time. Founders who post a brief early on AJ Cosmo Labs and begin the formulator search before finalizing packaging tend to compress that timeline meaningfully.
Read the full guide on how to find a formulator for waterproof sunscreen spray →