How do you put coving up on my ceiling?

[nightrider1470]

How do you stick coving to the tops of my ceiling? there is a just a small area that has come down and I need to put it back on



http://www.diy.com/nav/build/buildi...L-200-x-D-10-5-x-Dia-11-5cm-Pack-Of-6-9707894

 

[nightrider1470]

Looking for some type of sealant rather than hammering nails, "no more nails"?