This is definitely frustrating, my only concern with a gorilla glue solution on this is eventually the rubber on the seals will need to be replaced, I bought my Bighorn 3055 with the plan that this is my last trailer, five in 13 years trailer camping, so this is it (for the time being
).
Gorilla glue is very good stuff, almost too good for something like this, by that I mean when the rubber seals come to the end of their lives and I need to replace them, the gorilla glue will not let it go and I'm going to have problems replacing them with new ones in the future because I will need a clean smooth surface to mount new ones in the future. Unfortunately, I don't have a solution for this one, I'm going to check at my local auto parts store for something like a thin double-sided stick tape - similar to the mounting tape used for the sun screens on my truck windows, this may make it easier later on to replace with a little Goof Off to clean the surface later - however they may be problem with the Goof-off with the gelcoat so I will need to be really careful later on not to splatter.
I am open to any suggestions to repair this, I do like the idea of the contact cement posted by Dan Mayer and the silicone treatment by Ted to the gaskets to soften them. Does anyone have a suggestion of a good residual cleaner that won't harm the gelcoat if it splatters?