nikon lens slight problem with glue

[realspeed]

yellow mark is the flat ring around the lens (has filter on as a clamp)

The protective flat plastic screw cover on the nikon AfS 24-70mm G lens came unstuck and I can't see anywhere to obtain another. So reusing exisiting one. Big problem not to get glue onto lens glass so applied a glue (not super glue) onto the flat ring first. To clamp it down I am using a 77mm filter and hope it works and it does

 

[realspeed]

Update
It fell off again, and a disaster averted. This time I discovered it originally was held on with a ring of double sided tape. So carefully removed this and gave everything a good clean. Next the only other glue I have is carpet glue as spray. So put that plastic ring on a bit of kitchen roll and srpayed it.
Great really tacky stuff, so back onto the lens again and disaster. Yes got a bit on the lens and eventually managed to get the lens clear again with a dab of petrol to start with and lens cleaning fluid next with a wipe over of a micro fibre cloth. This time that plastic ring is well stuck down

Not perfectly clean plastic ring but at least filters can still go on and not having to buy a new lens