Confused over the use of silicone

plasticmaster wrote:
I have had 2 local RV dealers/repair shops recommend using silicone to seal the seams on my aluminum sided travel trailer such as around windows and vertical corner seams. About 8 months ago, I followed this advice and used silicone to reseal a window and it appears to be holding up just fine. Now I'm reading all over this forum about how you should never use silicone on a camper. I don't understand based on my personal experience and the advice given by my local RV dealers.

Silicone doesn't work well on certain surfaces. Experience will teach you what they are.
Or listen to those with experience on what works better.

Both of my rv servicing dealers have a sign hanging in their customer service waiting area giving do's and don'ts advise on sealants.
Both give the same please do not use pure silicone on your RV's exterior and give reasons why which have been stated here.