Slide-Out Bulb Seal Replacement Option for a 2018 Grand Design Reflection 303RLS

Updated 10/07/2026 | Published 10/06/2026

Products Featured in This Question

Rubber Bulb Seal for RV Slide Out - 1-1/8" C-Channel - 15' Long x 15/16" Tall

(201)

$80.69

Question:

My Unit: 2018 grand Design Reflection 303RLS. Im looking for a slideout bulb seal that when I measure it, it appears to be 1 x 15/16 with a track on the bottom so it can slide in the base seal. Can you help me.

asked by: Terry W

Expert Reply:

Hey Terry.

From what you've told me the # SR88VR is a very close match. You state a 1 x 15/16" measurement, this part has a 1-1/8" width and a 15/16" height. Comes in a 15ft strip, which you would have to cut to length. This uses the rigid C-shaped channel under the bulb you mentioned for it to slide onto the track. I also recommend going to grand designs website and doing a part lookup for your specific year, make, and model, as I was able to find a bunch of different parts that could be what you're describing.

Are you replacing the seal because of a leak, or is it just showing its age?

expert reply by: Trent G

close up of bulb seal recommendation
(click to enlarge)

Terry W.

10/6/2026

I'm replacing the seal because it has deteriorated and has turn into a crumbing tar mess. I have checked the Grand Design website couldn't really come-up with an exact part number. I believe your part # SR88VR is the correct, however if not, can I return it if it turns out to be the wrong size?

Trent G.

10/7/2026

@TerryW Yes, absolutely. Our return is 60 days, unused/uninstalled. However, a test fitment is okay. I'm going to email you a photo from the Grand Design website that may assist you as well.