3. White of egg made into a paste with slaked lime.
A composition for soaking corks, wood, packing, etc., to render them impervious to oil vapors, is:
| Gelatine or good glue | 2 parts | |
| Glycerine | 1/2 to 1 part | |
| Water | 6 parts | |
| Oil of wintergreen, etc., to keep from spoiling. | ||
X. Silicate of Oxychloride Cements.—For oil vapors, standing the highest heat:
1. A stiff paste of silicate of soda and asbestos.
Gaskets for superheated steam, retorts, furnaces, etc.:
2. Silicate of soda and powdered glass; dry the mixture and heat.
Not so strong, however, as the following:
| 3. | Silicate of soda | 50 parts |
|---|---|---|
| Asbestos | 15 parts | |
| Slaked lime | 10 parts |
Metal Cement: