Most liquid latex sealants do more damage than good in a road tyre. What works in a cyclo-cross tyre (or MTB for that matter) won't necessarily work in a road tyre either. Higher tyre pressures being the main reason.
In most latex based sealants ammonia is used to keep it in that state until put to use where contact with air (the leakage area) will make it cure. Any unused sealant will slowly cure inside the inner tube and will usually set where the wheel is already out of balance adding even more unbalance. This process of curing can take up to six months depending of the amount of product injected.
Keep in mind as well that liquid latex does not stick too well to a latex inner tube unless it sees a chance to slowly cure at a particular spot where the ammonia will actually "bite" into the latex inner tube and finally solidify.
IME quite often a small repair seems successful until a certain pressure treshold is exceeded where the repair gives in and you're back to square one.
Another drawback is that for as long as any liquid latex is present you should keep that tyre inflated. If not it may well stick to the inner walls of the inner tube and rip it to pieces should the tyre be reinflated again. Not to mention all the clogging of the valve core that occurs as it is pushed out with air rushing out etc., etc....
Some sealants such as Cafelatex use synthetic latex that is ammonia free. Haven't tried it yet but of all the typical liquid latex products I have tried Tufo's original sealant worked best even though it was pretty awkward to actually get it inside the tyre. Not sure about the newer Tufo, I still have plenty of the old one, hence....
Long story short; short of spending a life time trying everything out, keep the above caveats in mind and view it as a handy product for smallish repairs. Typically those not worth opening up an otherwise fine tyre for and repairing it the good old fashioned way....
Being a snob is an expensive hobby.