Bio-
ballast is very likely another sugar based concentrate based on the SDS at your provided link. SDS flash point ( decomposition point ) for sugar is 365'F per Bio-ballast SDS is ">375'F" and pure sugar degrades at 365'F or 185'C per Crystal Sugar SDS.
Bio-ballast SDS
Pure sugar SDS
I don't know about either Beetjuice ( Rim Guard) or Bio-ballast being less messy as they are both examples of waste product that would normally go into animal feed instead being repurposed and sold at a much higher profit as wheel ballast.
Bottom line is they both provide the highest density, with anti freeze properties, wheel ballast available. Both require the solution to be warm, either done in warm weather or heated, as they are very thick in cold weather and much harder to pump in thru that small tire valve. Tires are filled with valve at high point and fill stops when solution runs back out valve. This prevents filling a tire till its solid and provides an air cushion when driving over a raised object.
Bottom line. Shop around for either Rim Guard or Bio-ballast for least expensive installed or drummed product as they are essentially identical but from different organic feed stock
ps. My
M59, bought used out of PA and shipped to NC, came with RimGuard but not listed as feature during sale. I discovered filled rear tires when I tested air pressure and purple juice sprayed out due to valves not being at highest point.