We use traction compound on our 1/10 trucks foam tires for carpet racing.
This is what I am using right now. It is some nice stuff, but they went crazy on pricing recently.
http://www.amainhobbies.com/product_...-Tire-Traction
I have used this in the past. As a FYI it has a strong ordor, most tracks ban it.
http://www.amainhobbies.com/product_...ction-Compound
A friend is using this one and he likes it so far.
http://www.amainhobbies.com/product_...on-Formula-4oz