Reflectivity and drainage describe different functions. A coating may change surface properties, but it should not be assumed to correct low spots, blocked outlets, or structural conditions. Those issues need their own evaluation.
What to do next
Ask whether the proposal includes drainage investigation or only surface treatment. Keep any energy-related claims separate from waterproofing and geometry claims. Where water collects, review the selected product's limitations and the underlying cause before authorizing work.
Related Perkins guidance
Contact Perkins Roofing to discuss your roof and the appropriate next step.