Purpose: This paste is used to check the depth of gasoline and other hydrocarbons (like diesel, kerosene, and jet fuels) in fuel tanks.
Application: It is applied to a rod or weighted string and lowered into the tank.
Mechanism: The paste, originally a light pink color, turns red upon contact with gasoline, providing a clear visual indication of the fuel level.
Storage: It should be stored between 2 to 46°C (35 to 115°F).