In the process of putting my car back together. I have always been a big fan of 3M yellow weatherstrip adhesive. I picked up some of this stuff on amazon and really like it for places that the 3M may get messy. Small pieces like the outer hatch seal or where the window channel curves and wants to fold in. I use these little micro brushes and just hold it together for 20 seconds or so. It is cyanoacrylate, but has a better consistency than regular super glue and is black. 

Edited December 4, 20231 yr by emccallum

How do you expect that will hold up over time?

Is an applicator necessary or are you just using those to spread it out?

Cyanoacrylate adhesives do not flex so I’d stay away from that type for seals. I also use the 3M and it’s great. The key is to let both surfaces get non-tacky before applying them together. 3M 777 is also good for other applications. 

I agree, I wouldn't use it on a primary large seal. The outer hatch seal (non oem) has a small stiff channel tbat fits over the metal lip. It's hard for me to be that precise with 3m. I used it for the inspection lid rubber piece too. 

As for the micro brushes, I just use them so I don't cut the bottle and chance having it dry up.