Finally finally finally, Steve Jackson Games allowed their Car Wars articles up on the intertubes, including a long lost article on the [insert retching sound] Stickyfoam: Pyramid: Uncle Al's 2050 Catalog Supplement. Thanks to Michael Owens of SWAT for letting me know, here.
Here's the crucial data, just in case something happens:
Stickyfoam Sprayer (SfS) - $750, 25 lbs, 2 spaces, 3 DP; 25 shots ($30 and 2 lbs each). Loaded cost $1,500, loaded weight 75 lbs.; loaded magazine costs $800 and weighs 65 lbs. The sprayer mixes two binary chemicals to produce an instant 1" x 1/2" patch of stickyfoam. Any hazard suffered or maneuver performed on stickyfoam adds D4 to the difficulty; stickyfoam also does 1 point of damage to each tire and slows the vehicle down by 5 mph per 1/2" of stickyfoam crossed. Stickyfoam does not burn or melt, but its effects can be negated by Sand Ammo, Stickyfoam Neutraliser, or Superacid. Pedestrians entering a square with stickyfoam will be stuck fast until the foam biodegrades or is neutralised.
Catalytic Spikes -- $60 and 5 lbs each. Look just like regular spikes and are loaded in a regular spikedropper. A loaded magazine costs $650 and weighs 65 lbs. Does 1d damage to tires, no damage to solids, like regular spikes - but injects a chemical that continues to dissolve the rubber, doing 1 point of damage every second turn, even to solid tires, until the tire disintegrates completely. Plasticore tires will take 4 points of damage before being reduced to bare plastic; damage will then stop.
Crystal Spikes -- $30 and 4 lbs each. Do damage just like regular spikes and are loaded in a regular spikedropper. A loaded magazine costs $350 and weighs 45 lbs. Made of transparent plastic, Crystal Spikes can be seen on a roll of 1 at 6" distance, on a 1-2 at 5", on a 1-3 at 4", and so on; Visibility Targeting Modifiers apply. Not available in Catalytic, Explosive or Incendiary versions.
Pyrophoric Oil -- Any standard oil jet or discharger can drop Pyrophoric Oil. CPS 5x normal, WPS normal. Pyrophoric oil won't burst into flame until the pressure-sensitive microbeads inside are crushed, causing a chemical reaction (50 lbs to trigger anti-personnel version, 300 lbs to trigger anti-vehicle version) that ignites the slick. Damage and other effects as a Flaming Oil Jet. Volatile weapon.
Pic from the SJGames site.