To get right seal you'll need to remove a portion of the seal you currently have to get the side profile. There are multiple types of applications for slide-out seals; Glue On, Peel-N-Stick, Press In, Push On, and Slide-On. There are multiple styles and measurements; some come with a bulb, some don't.
For example the Rubber Wiper Seal and Bulb for RV Slide Out # SR98FR you were looking at comes with the bulb and is a stick on design. If you can pull a couple of inches of the seal out to... view full answer...