I still have a Liquid Tire Chain option in one of my parts cars. It was offered in '69 only. The can posted above is not it though. The LTC option was bolted on the Rear Wheel Wells to shoot the liquid directly onto the tires, as shown above in the diagram.
It was a pretty cool option. There were actually quite a few cool options that you could get in '69.
-Parting Out over 75 '58 to '73 Full Size Chevy Cars-
-National Impala Association
-Vintage Chevrolet Club of America