I've never used it, but I was curious so I checked their website. Since the major constituent of all of these formulations is water, I was interested to see the weight differences between them.
On
the RimGuard website, they don't provide the specific gravity so that a direct comparison can be made. I find that a bit suspicious. They do provide some comparisons, but they don't give any data to back their claims.
In their comparison to methanol, they say this:
35-40% seems significant. BUT!
Notice the wording. "Weighs 35-40% less than Beet Juice Tire Ballast." But THEN they say, " "Should be mixed with water."
Yeah. That 35-40% is a comparison to methanol, NOT to a methanol/water mix. Does anyone run pure methanol? I don' theeen so, Lucy! And, while I can't be sure (because they don't provide the actual data, just their comparisons), I suspect that the weight difference between RimGuard and a typical methanol/water mix isn't enough to be worth the trouble of switching, even if the product were free.
Now, is there a big difference in corrosion resistance? I have no idea. I see their claims, but given the very deceptive way they talk about the weight, I have no reason to believe their claims. If you check their comparisons to other products, and do so with a grain of salt, you'll see that they have been.... maybe a bit less than completely honest there, too. For example, they say that calcium chloride is pretty bad stuff. It's, "Highly corrosive." and it's, "Not safe for the environment or livestock. "
Hogwash. Those are exaggerations to the point of being untruthful. They even complain about plain water having "Inconsistent quality". Give me a break!
RimGuard might be the best thing for tractor tires since sliced white bread, but absent any actual data, I"m pretty confident that the weight difference is going to be very small, not worth messing with.
And for me, when a company engages in that kind of dishonest marketing, I don't care how good their product is, they aren't getting my money.
YMMV.