FWIW Dowsill 1080 is the sealant MWS recommend, and needs to cure for at least 24 hours from memory.

Also as John V6 mentions, running tubeless tyres with a tube is a not advised as the inner surface of tyre is rough enough to abrade tube. Possible seating issues as well as no direct pressure onto bead.

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone