ALCM 2# Aluminum No Fiber Roof Coating 5 Gal is manufactured from a blend of select asphalts, solvents, resin, and two pounds of aluminum paste per gallon. The Non Fibered Roof Coating form overlapping layers of aluminum at the surface and the layers protect the coating and the roof surface below from the sun, wind, rain, ice, and snow. TheALCM 2# Aluminum No Fiber Roof Coating 5 Gal will cover approximately 0.33 to 0.5 gallons per 100 square feet over metal and 0.5 to 1 gallon over asphalt built-up roofing.