I have used the Rimguard. It is denser and it doesn't freeze. The downside is that if you develop a leak it is a gooey sticky mess. After the Rimguard I found another similar product made from corn. A tire shop that handles ag tires and repairs had it.Beet Juice (rim guard) is high density and adds more weight to wheels than water/antifreeze. I added rim guard to my 332 with loader along with a starter weight and double notch cast iron on each wheel. Two problems. First you need to put rimguard in your retirement plan because it is quite expensive. Second it was a waste of money on a tractor with CTC loader. Loader uses tractor hydraulics and has limited lift capacity. I plan to add a dedicated hydraulic system to fix this problem.
$102 parts and labor to fill two 23x10.5-12 tires with beet juice.
Link gives weight for rimguard filled wheels ... 1987 332 w/loader ... Southwest Wisconsin