We Should Have Fixed This RV Slide Ski Last Year

Every RV owner keeps two lists: the jobs you handle now, and the ones you tell yourself can wait until next season. Last October, our cracked RV slide ski landed on the second list. We taped it, closed the rig up for the Ohio winter, and promised ourselves we’d deal with it in the spring. That promise is the whole reason this video exists — and the reason the title isn’t an exaggeration.

The RV slide ski replacement we kept putting off

If you’ve owned a fifth wheel for more than a year, you already know the feeling. A small thing breaks, it’s still technically working, and the season’s nearly over — so you patch it and move on. The factory slide skis on our 2021 Alliance Paradigm 310RL are long, curved, brittle plastic, and when one cracked, duct tape and a promise got us to storage. We ordered the replacements through Alliance. They arrived after the rig was already closed for winter. So the job waited.

What we found when we finally pulled it apart

Opening the rig back up this spring, the patch had held — which almost made it worse, because it meant nothing looked urgent. Then we pulled the old ski. What came out with it, and what we found in the cavity underneath, turned a straightforward slide ski swap into something we hadn’t planned for. I’m not going to lay all of it out here. It’s the kind of thing you have to see to understand why we stopped working and started taking pictures.

The fix I tried — and the one I’d take back

Before we left for the rally, I wanted to protect the bare wood I’d uncovered, so I reached for Flex Seal — the paste first, then the rubberized spray. It set up clean, it looked right, and for about forty-eight hours I thought I’d solved it. Then we closed the slide. What that Flex Seal did to our kitchen floor is the part of this video I’d rather you watch than read — partly because it’s the most useful warning in the whole job, and partly because Debi’s reaction tells it better than I can type it.

What you’ll see in the full video

• How we found the cracked slide ski — and why the winter patch hid the real problem
• Pulling the brittle factory skis on our Alliance Paradigm 310RL, and the debris we didn’t expect underneath
• The Flex Seal paste-and-spray shortcut, step by step — and the result I’d take back
• What the Alliance service team told us at the 2026 National Rally

The honest version — the mistake, the mess, and what it’s going to take to put it right — is all in the video. If your slide skis are more than three years old, watch it before you put the job off another season. We did, and waiting cost us.

We post a new RV video every Sunday — the real version, problems and costs included, not the highlight reel. Subscribe so the next one finds you. And right after this repair, we hit the road to Elkhart, Indiana for our first Alliance National Rally — that’s the story we’re telling next.