Practical House, Wagon and Automobile Painter / including sign painting, and valuable hints and recipes

by W. F. White

FIREPROOF PAINT FOR ROOFS, ETC.

A recipe published thirty years ago in the Maine Farmer:

Slake stone lime by putting it into a tub to be covered to keep in the steam. When slacked pass the powder through a fine sieve, and to each 6 quarts of it add 1 quart rock salt, and water, 1 gallon; then boil and skim clean. To each five gallons of this add pulverized alum, 1 pound; pulverized copperas, ½ pound; then slowly add powdered potash, ¾ pound; then add hardwood ashes sifted, 4 pounds; now add any color and apply with a brush. This paint stops small leaks in roofs, prevents moss, is incombustible, and renders brick waterproof. It is durable as stone.