Types of Preservatives

There are three types of preservatives with different bases as prescribed in the Code (IS: 401–2001).

1. Oil Types

In this type coal tar creosote with or without admixtures of soluble oils is used.

2. Organic Solvent Types

These are toxic chemicals in non-aqueous solvents such as copper napthenate, zinc napthenate, benzene hexachloride, etc.

3. Water-base Types

These are toxic chemicals in water, such as zinc chloride, boric acid, copper chrome arsenic composition, etc.