The coverage rate for Mule-Hide #406 Standard Fibrated Aluminum Roof Coating is approximately 1 to 1.5 gallons per 100 sq. ft. The spray requirements are 3,000 psi at 1.5 gallons per minute. Tip size = 0.051 to 0.067, Fan = 6 inches. (All values are approximate and may vary with ambient temperature and job conditions.)