Thanks for all the good information. The reason that I asked:
We bought our trailer new off the lot and it was over a year old. it is in great shape although one issue I found was the top seal on the dinette slide was torn and the rubber was "sticky". After finding a minor leak with the slide closed and discovering the bad seal, the dealer had it replaced and also sealed the windows again as a good measure.
We live in South Alabama and it is very hot in the summer. I wondered if storing the slide closed in extreme heat could damage the seal.
Anybody experience a similar problem in extreme heat?
Maybe the rubber in the seal was defective or somehow it was exposed to some solvent that degraded the rubber. The roof shows no signs of any issue, so I figured that chemical exposure was not probable.
This forum is a great way to resolve problems, share ideas and information. It has already helped me with several issues. Really enjoy just reading all the information also.