what kind of sealant should i use for a piece of metel that's bolted ontop of the radiator, where a cap and housing used to be? It's a quick fix for right now, I know it's retarded but the previous owner laid it on me. Ive tried tack and seal, but I guess it doesn't cure well on plastic. . any suggestions?

 

no body? I just put some blue sealant on, with no gasket, but I heard that it tends to have air pockets. .