What a load of CRAP!
DO NOT USE EQUAL - YOU WILL REGRET IT.
I successfully balnced all my previous offroad tires with out resorting to that crap. It sticks like **** to a blanket if you get moisture in there and it's a real pain to get out.
My biggest tires were 38.5x14.50x15 Swamper TSL/SX (non radials) on beadlocked rims.
What you need to really do is find an alignment shop with a Hunter GSP9700 Road Force Measurement System - this is what I used.
http://www.gsp9700.com/pub/technical/4127T/4127t.cfm
HTH
-C