Cartridge. For fairing, filling, and patching. Fast-cure formula allows for quick recoats. Can be easily painted. Waterproof when cured. Use above or below the waterline. Excellent chemical resistance. White (when combined). Coverage: Per Gallon .8 sqft @ 3/4″ thickness 1.2 sqft @ 1/2″ thickness 2.4 sqft @ 1/4″ thickness 4.8 sqft @ 1/8″ thickness 9.6 sqft @ 1/16″ thickness Number of Coats: 1.