Inertol
Inertol is the protected name for a coating material based on bitumen .
Applied as a protective coating on concrete and steel, for example on foundations, small iron parts, gutters and mast feet, it protects against seepage water, moisture and the effects of the soil and also serves as corrosion protection.
Inertol was developed by the chemist Dr. Roth developed when the city of Frankfurt was looking for a solution to rescue leaky drinking water tanks in the city forest. The building material concrete, considered indestructible in underwater construction at the time, had not withstood the drinking water.
Dr. Roth had the recipe protected and began industrial production in his own factory. A little later, the company of the Stuttgart entrepreneur Paul Lechler , who already had experience with the wood preservative Carbolineum , took over sales.
The agent may no longer be used for drinking water tanks, as symptoms of poisoning were already observed in the 1920s.
source
- Commemorative publication for the 75th anniversary of the Paul Lechler Stuttgart company 1879–1954