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hippy-
most people will probably be adding it to a dirty chain and then it'll do 3/8ths of fuck all?
Well, maybe more like 1/8th of what could be achieved by coating the parts before assembly.
If you get the chain clean (multiple passes through the ultrasonic in a solvent, then bake out any residue) and then vacuum impregnate with the WS2 colloid, you might be getting somewhere, but a tiny little bottle isn't going to do it, you need to immerse the chain.
gbj_tester
The theory of WS2 is great, but getting it to coat the relevant surfaces by dripping a colloidal mix onto an assembled chain which has already been greased at the factory is another matter. What you really need to do is to coat the clean and dry parts using some method (not sure which, probably at least 4 main options and research needed to pick the one which is optimal in terms of lubricity and durability in the roller chain application) before assembling the chain