How many coats of Flex Seal do I need?

Hello there, I'm wondering about the number of coats of Flex Seal I should apply for optimal results. Could you please elaborate on the ideal number of coats, taking into account factors such as the surface material, the weather conditions, and the desired durability? Also, is there a specific technique or timing that I should follow when applying the coats to ensure the best possible adhesion and protection? Thank you in advance for your insights.