Originally Posted by RichardV6
Image below shows a spoked stainless rim from my Roadster. A band of special sealant is carefully added to cover spoke nuts and so give an airtight seal to accept tubeless tyres alone.

[Linked Image]

Here I'm repairing damage due to foolishly adjusting a slightly loose spoke in situ blush

Richard's image clearly shows the extra safety ridge, rolled into the rim about half an inch behind where the tyre bead sits, if you have this it's safe to run tubeless (assuming your spokes are sealed)

Jon M