Harry Bloomfield submitted this idea :
Dave Plowman (News) pretended :
Lidl had their very good label remover last week. It may not work in your
app. but worth a try if you can still find it? It's safe on most surfaces.

Thanks, that reminds me I have some stashed away somewhere in the workshop.
Yes, the sealant seems very similar to that glue used on some labels, so
worth a try.

Having tried it - it helped a little. It basically stopped it
resticking, when it was rubbed off, though it didn't actually dissolve
the sealant.