how can i refix and seal one roof panel ( plastic ) on my conservatory ?

One plastic roof panel blew off my conservatory roof during the recent gales in the Glasgow area. It is not damaged, but i need to know what sealant or tape is required please. Also is it silicone sealant that is used to secure the plastic trim strips again after replacing the panel ? There also appears to be a tape around the edge of the roof panel, probably to keep water out of it, where can i get more of this ? I do not know who suplied or built this conservatory im afraid as it was here long before i bought the house ? Thanks for any assistance, Geoff