Use New Pig Plug-N-Seal no-freeze patching paste with fuel tanks, steel drums and containers. Specially formulated for storage and application in cold temperatures that would freeze standard patching pastes. Temporarily stops leaks until system can be drained or leak source contained. Excellent chemical resistance makes it ideal for flammable or hazardous leaks. No preparation needed, even on dirty or rusty surfaces. Temporarily stops leaks from 2 minutes up to 2 hours. Ready to use without mixing. Contains gray/green colored bentonite clay, propylene glycol with polymer base.