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:

4.  Silicate of soda....... 1 part

Oxides of metal, such as zinc oxide; litharge, iron oxide, singly or mixed..... 1 part

Very hard and extra strong compositions:

5.  Zinc oxide.......... 2 parts

Zinc chloride........ 1 part

Water to make a paste.

6.   Magnesium oxide ... 2 parts Magnesium chloride. 1 part Water to make a paste.