This is one of the most generally useful substances we have for luting purposes, if absorbed by a porous substance that is inert.

Formulas: 1. China clay of general utility for aqueous vapors.

Linseed oil of general utility for aqueous vapors.

2.  Lime forming the well - known putty.

Linseed oil forming the well-known putty.

3.   Red or white lead and linseed oil. These mixtures become very strong

when set and are best diluted with powdered glass, clay, or graphite. There are almost an endless number of lutes using metallic oxides and linseed oil. A very good one, not getting as hard as those containing lead, is:

4.   Oxide of iron and linseed oil.