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That stuff is vile and can ruin a tyre.
What I have learnt, to carry a tubeless repair kit (bought from a french hypermarket) and one of these https://www.wilko.com/wilko-tyre-sealant/p/0344045. If I get a puncture I move the hole in the tyre to the bottom, remove the valve and add the tyre sealant. The reinsert the valve, then inflate with a couple of co2 canisters, then ride gently to somewhere where I can inflate the tyre fully. Has worked everytime and the tyre sealant can be simply washed out and a proper repair made if need be.
Mine is similar to @BrickMan 's, but no allen keys (bikes are too old) and the addition of a 8" adjustable spanner, plug spanner, spare plug (bikes are both 2 strokes) and hand cleaner.
Especially the hand cleaner, otherwise roadside repairs effectively cost a pair of gloves.