I use it, it seals really well, sometimes a bit too well clogging up the valves.
@alexgold123 according to some tests it seals almost as well as Stan’s race sealant at only a quarter of the price. If you want even better sealing capabilities they have an additive but really that stuff is just too strong, only for a race maybe
This is true, it’s definitely good at clogging valves!
According to my ‘tests’ it barely seals anything without a plug. My mate who also used it lost the entirety of the 60ml he put in the rear tyre out of a hole ~3mm across before it even sealed, he’s still got stains on his bike from it!
Or I could use another sealant that I’ve tried and tested and works. 
Do you suppose the caffelatex reacts to other sealants?
I just ordered a Vittoria insert but I don’t know if it’s going to arrive in time for my A-Race.
I will grab another bottle of Muc Off as I’ve had good experiences there. Just got to hope the goobers even themselves out a bit in the current set up if the new one doesn’t arrive tomorrow
If the Muc Off sealant gets on your bike then clean it off as soon as possible as its a nightmare to remove once it’s dried.