- Quickly and easily plug leaks or drips by pressing putty over and around puncture to stop flow. Chemically-inert material won t react with leaking liquid. 3KLC3 works well on organic solvents, hydrocarbons, and other water-insoluble liquids. 3KXC4 is suitable for a variety of hazardous liquids including acids, caustics, and other water-soluble liquids. Premixed putty for quick, easy application.