What is this part called

[RvReno]

Hello - There is (was) a long plastic strip that went in a channel that covers the screws the hold the gutter. It became completely dislodged and fell out on its own. Of course this happened a few months after warranty expired. It looks important to keeping water out. Does anyone know what it's called and where I can get another? I want to call it weather strip, but that does not seem complicated enough. Thank in advance!

 

[FT4NOW]

This is it, comes in different sizes and colors.

Sent from my SM-G950U using Tapatalk

 

[Always Learning]

Hello - There is (was) a long plastic strip that went in a channel that covers the screws the hold the gutter. It became completely dislodged and fell out on its own. Of course this happened a few months after warranty expired. It looks important to keeping water out. Does anyone know what it's called and where I can get another? I want to call it weather strip, but that does not seem complicated enough. Thank in advance!View attachment 34736

This might be a good place to start looking.

https://www.amazon.com/Insert-Molding-Camper-Travel-Trailer/dp/B077H1L4N4

 

[Wicked ace]

Just a couple FYIs.
You can look up parts here: https://www.granddesignrv.com/owner-support/service-and-warranty/parts-lookup
You don't tell us the model & year of your trailer. If you can identify the Grand design part description try calling customer service and tell them what happened. There is a high probability, since you are just out of warranty, they would send it to you as a courtesy.
Also you can get a better idea of the size & color of the trim strip from the web site.