Slideout Top Corner Gasket
I just noticed that on my slideouts, only two corners have the extra “L” shaped gasket like the picture attached. It appears that they help protect the top corner joint from water intrusion when open. I will get a ladder for closer inspection. Should these be on very top corner? Are they still available for sale or is this another make-it-yourself part? Thank you for to your advice.
2003 Alpine 40 MDTS