One version of constituents can be found on Draxxus homepage FAQ's -> General -> EPA-MSDS
"SECTION 1 - INGREDIENTS
CHEMICAL IDENTITY INGREDIENTS
POLYETHYLENE GLYCOL
GELATIN
GLYCERIN
SORBITOL SPECIAL
TITANIUM DIOXIDE
FD&C APPROVED COLORANTS"
I'm not sure about the RPS Advantage but I recall to have seen them having a patent of using some kind of modified starch in paintballs - could be that is the thing they are made of.