Leveling seam sealer w/ dispenser?

Well, this got reviews that I can live with. Mostly complaints about it being runny.

Nice thing is designed to run thru a normal caulk gun. The chambers are in the single tube.

http://www.eastwood.com/ew-2k-self-leveling-seam-sealer-cartridge.html#tab_content_reviews

Any opinions or alternate suggestions of similar setup?