Don't know how I forgot this one, but thermal dye. A non-toxic dye mixed with DMSO designed to intensify the targets thermal signature by increasing skin temperature (bonuses to track with thermal vision, pretty much the opposite of thermal damping). Also useful with UV dye or even neon dye for normal vision. The DMSO makes it soak into the skin and becomes a real bitch to get out (reminds me of a funny story involving a really hot night, condensed milk, and an annoying room mate...took a week for the soured milk smell to go away).
A more costly method (although usually more effective in a chase) is the splash grenades with glue and Stealth RFIDs (or really just adding sticky RFIDs to any splash grenade). Hit them and track them.
Then there's always the poor mans vomit grenade. Splash grenade filled with vinegar (or putrified roadkill). Not effective against high trained and equipped security, but definitely works on lower level threats (even at power 3 or 4, nausea and or disorientation is quite noticeable on lower threats).
And of course, the party crasher grenade. Splash grenade filled with DMSO and Everclear. Welcome to the Wastedland.