Have ready - glued and trimmed picture domes, blue tack, plastic bag, Clear Seal code 863-3850
Place a small pool of clear seal onto the plastic bag
Using the blue-tack, pick up a picture dome
and lower it into the edge of the clear seal
You will see the Clear Seal go around the edge of the dome, TWIST the dome around so the total EDGE is covered. Don't drown the dome!
Then SLIDE it off the plastic so there is just a thin coating on the back
Remove from the blue tack with your forefinger and thumb, and place on a flat level surface of plastic or glass to dry at around 20deg for 2 hours ... that's it. When it is dry you can use epoxy glue (such as Araldite) to stick it into your bezel setting.