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Last spring, I pulled my 2017 travel trailer out of winter storage and immediately noticed something alarming. Water stains had crept along the interior wall next to my bedroom slide-out. My heart sank. After some careful poking around, the culprit was obvious — the slide-out seals had cracked, hardened, and shrunk over two cold winters. I knew I needed a solid RV slide-out seal replacement kit review experience of my own before blindly buying whatever showed up first in search results. So I did the research, ordered the parts, and tackled the whole job myself over a long weekend in April.
This wasn’t a small problem. My slide-out is roughly 12 feet wide, and both the D-seal and the wiper seal were in bad shape. The rubber had gone brittle — I could flex a section and it would almost crack in my hand. Water wasn’t just threatening to get in; it had already started. I needed a replacement that matched the original specs exactly, because a seal that’s even slightly wrong in profile can gap, bunch, or fail to compress properly.
I spent about three evenings reading forums, watching YouTube teardowns, and comparing product listings. Eventually, I landed on the Combo RV Slide Out Seal Kit Replace 018-312-EKD & 018-341 EK, 1″ × 15/16″ × 35′ D-Seal Wiper & 1/2″ × 2.75″ × 35′ Travel Trailer Weather Stripping Clip Base. Here’s everything I learned — the good, the frustrating, and the honest verdict.
Why I Chose This RV Slide-Out Seal Replacement Kit
Matching part numbers was my first priority. My original seals were stamped with 018-312-EKD and 018-341 EK — common Lippert and Camco-compatible designations. Finding those exact numbers on a product listing gave me real confidence. Many generic kits I found listed vague dimensions without referencing any OEM cross-compatibility at all.
Price was also a factor. Dealer quotes for a professional seal replacement ranged from $180 to over $300 just for labor, not counting parts. This kit, which includes 35 feet of both the D-seal and the clip-base wiper, came in well under $60. Even if I made a mistake during installation, I had plenty of material to work with.
Forum feedback tipped the scales further. On multiple RV owner communities, people mentioned this specific combo kit by its part number cross-reference. Several users with Keystone, Coachmen, and Forest River units reported successful installs. That kind of real-world corroboration matters more to me than polished product photography.
First Impressions Out of the Box
The kit arrived in a flat, rolled package — exactly what you’d expect for rubber seal material. Both rolls were individually wrapped and labeled clearly. The D-seal was firm but still pliable, which is exactly the right texture for new EPDM rubber. The clip-base wiper strip felt equally solid, with a consistent profile all the way along the roll.
I did a quick side-by-side comparison with my old seals. The profile match was very close. The D-seal cross-section matched my original almost perfectly in height and width. The clip-base section snapped into my existing track with satisfying resistance — not loose, not impossibly tight. That small test right there told me I had the right part before I even started uninstalling anything.
Build quality looked consistent. There were no visible gaps, thin spots, or off-center extrusions along either roll. The rubber had a slight sheen but wasn’t overly coated. Honestly, the material felt comparable to what came stock on my trailer — which is the highest compliment I can give a replacement part.
My Installation and Testing Protocol
I tackled the job over two days. Day one was full removal of the old seals and surface prep. Day two was the actual installation and testing.
Tools and Prep
Here’s what I gathered before starting:
- Flathead screwdriver and a plastic pry tool
- Isopropyl alcohol and clean rags
- Sharp utility knife with fresh blades
- Tape measure and marker
- A helper for holding sections during fitting
Removing the old seals was tedious but straightforward. The clip-base section pried out of its track in segments. I cleaned every inch of the track channel with isopropyl alcohol to remove old adhesive residue and debris. Good prep is the difference between a seal that lasts two years and one that lasts ten.
The Installation Process
I started with the clip-base wiper section first. The clip snapped firmly into the track channel. Working in 3-foot segments made it manageable. Corners required careful scoring with a utility knife to allow the rubber to bend without buckling — a tip I picked up from a YouTube video on the same part number family.
Then came the D-seal. This section compresses against the RV body when the slide retracts. I pressed it firmly into place, making sure the hollow D-profile sat proud enough to make solid contact. My one moment of real doubt came here — the D-seal felt almost too stiff to compress the way I expected. I briefly wondered if I had the wrong profile.
However, when I ran the slide in and out twice, the compression felt right. The seal deformed correctly, rebounded cleanly, and left a uniform mark along the contact surface. That small panic turned out to be nothing — new rubber is just stiffer than worn rubber. Good to know for next time.
After installation, I ran the slide out and back in about eight times over two days to let everything seat properly. Then came the real test: a garden hose.
What Actually Changed After the Replacement
The water test was thorough. I ran a hose along every edge of the slide-out — top, sides, and bottom — for about five minutes at moderate pressure. Then I went inside and checked every inch of the interior wall and floor. Completely dry. No seepage, no drips, no damp spots.
That alone was a huge win. Before the replacement, even heavy rain would leave moisture along the lower interior wall. The difference was immediate and obvious.
Beyond waterproofing, I noticed two other improvements:
- Reduced road noise: On my first trip post-install, the slide-out area was noticeably quieter at highway speeds. The old cracked seals had been letting in wind noise I’d gotten used to ignoring.
- Smoother slide operation: The slide moved more smoothly than it had in years. The new wiper seal glides without the grabbing and sticking of degraded rubber.
I’ve now taken the trailer on three trips since the install — totaling about 2,400 miles and including one overnight rainstorm. The seals have held perfectly. No leaks, no lifting at the edges, no signs of the clip-base working loose from the track.
The Downsides Worth Knowing
No review is complete without honest criticism. Here’s what I’d flag before you order:
No installation instructions are included. The kit ships with zero documentation. If you’re not already comfortable with RV maintenance, you’ll need to find a tutorial before starting. This isn’t a dealbreaker, but it would help a lot of first-timers.
The 35-foot length is exact — not generous. My slide required about 32 feet of each seal type. That left me very little margin for error. If your slide-out is larger than average, or if you make cutting mistakes, you might come up short. Measure carefully and consider whether you need two kits.
Corner fitting takes patience. The rubber doesn’t have a lot of natural flex at tight corners. Rushing that step could result in gaps or improper seating. Take your time and use a sharp knife.
Fitment depends on your specific trailer. The Combo RV Slide Out Seal Kit Replace 018-312-EKD & 018-341 EK is designed to replace those specific OEM part numbers. If your trailer uses a different seal family, double-check your measurements and part numbers before ordering. Profile compatibility is everything with slide-out seals.
Final Verdict: Who Should Buy This RV Slide-Out Seal Replacement Kit
Based on my hands-on experience, this is a solid, cost-effective solution for the right buyer. This RV slide-out seal replacement kit review comes down to one core question: do your part numbers match?
Buy this kit if:
- Your original seals are stamped 018-312-EKD and/or 018-341 EK
- You’re comfortable with basic DIY RV maintenance
- You have a single slide-out under 33 feet of perimeter
- You want to avoid dealer labor costs for a straightforward job
Skip this kit if:
- You’re unsure of your current seal part numbers — verify first
- You have multiple large slides that will require more than 35 feet per seal type
- You’re looking for a stick-on or adhesive-backed solution — this is a clip-in system
For my specific trailer and those part numbers, the Combo RV Slide Out Seal Kit Replace 018-312-EKD & 018-341 EK, 1″ × 15/16″ × 35′ D-Seal Wiper & 1/2″ × 2.75″ × 35′ Travel Trailer Weather Stripping Clip Base delivered exactly what I needed. The water leak is gone, the road noise dropped, and I saved over $200 in dealer labor. That’s a real win by any measure.
Consider This Alternative If Your Slide Needs a Wider Wiper
If your trailer uses the 018-316 EK base instead of 018-341 EK, or if you need a wider wiper profile, take a look at the RV Slide Out Seal Kit 018-316 EK Base with 2-7/8″ Wiper & 018-312-EKD, 1/2″ × 3.66″ × 35′ Clip Base & 1″ × 15/16″ × 35′ D-Seal. It uses the same D-seal profile but pairs it with a wider 2-7/8″ wiper and a 3.66″ clip base. That wider geometry suits certain slide track configurations — particularly on larger fifth wheels and some Class A motorhomes. It’s worth cross-referencing your OEM numbers against both listings before you order.
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