Van Conversion Sprinter Side Trim Repair

We fix a BIG design flaw with sprinter vans by fixing our sprinter side trim to make it waterproof.
Van Conversion Sprinter Side Trim Repair

They love giving DIY van converters more work, don’t they?! Something that needs fixing on Sprinter and Crafter vans is the (usually black) side trim, which is clipped onto the side of the van with clips that have no sealant on the. As a result, over time, they start letting water in (causing even more damage). Since the big shot companies have failed to make their vans watertight, here is what we did to fix it.


Behind the wheel arches (front and back) there are tiny little Torx bolts that need to be unbolted in order for you to remove the black trim. Scrape away the caked-on dirt and use a T20 Torx head attachment to unscrew them (and don’t get your head trapped). 🤕

van conversion side trim seal


To remove the trim, go to where the trim meets the wheel arch, get a flathead screwdriver covered in fabric (so you don’t gauge your metalwork or plastic) and get it between the black trim and the metalwork and tug until you can get your fingers under there.

Then it’s a matter of tugging up hard enough to pop out the plastic clips but not too hard so you break them or the actual trim piece.

You will need to put quite a lot of force into it, and it will feel wrong as though you’re about to break it – this is normal. You will squirm – you have been warned.

Watch out for the indicator lights 💡 These are attached to the plastic side trim! To remove, simply twist and pull out of their housing, and leave them dangling.

van conversion side trim seal

top tip

When initially doing this, we only removed the black plastic side trim from the middle and rear of the van but not on the front doors. 

It turns out that there are plastic clips beneath all the plastic side trim, so best to do it all in one go. Otherwise, you’ll have to come back and do the front ones at a later date because they will leak!

The front doors have Torx bolts holding in the side trim as well, on the side of the door.


Depending on how old your van is, you might get a mini heart attack to find how much dirt (or even rust) is behind the trim. Do your best to clean, de-rust and protect those areas.

If there is rust, since the plastic hides it, you don’t have to paint it decoratively. Just protect it with Hammerite, a rust converter or whatever rust protective primers you have around – something is better than nothing.

Some of the plastic clips might still be stuck in the van, so get a tiny flathead screwdriver, pry between the clip and the metal, find the push point to release on the side, push it in with the screwdriver and then pull them out at an angle.

Please note: your fingers will hurt afterwards. ☝️

van conversion side trim seal


Pull all the clips from the van and the trim out, clean them in soapy water and wipe the surface that will touch the van. That way, the sealant is more likely to do its job.

If your plastic side trim is in need of a clean or repaint, now is the best time to do it, since they are off the van.

van conversion side trim seal

top tip

Placing all the clips back into their holes on the side trim pieces (preferably the right way around) makes things a whole lot easier when it comes to applying the sealant.

If you break any clips, they are cheap to buy on eBay. It might be best to buy some replacements just incase, as we did break two.


It’s best to do this one trim piece at a time.

Get your neutral cure silicone (this has to be a neutral cure; regular silicone releases chemicals that ‘eats’ the metalwork).

Do a small circle on each of the plastic clips until all clips on that trim piece have some, then quickly reattach the trim to the van by lining the clips up to the holes and essentially press/hit the piece back on. 

Remember to reattach the side indicator bulbs.

Don’t get too aggressive, and remember to rebolt the trim pieces back into place with those Torx bolts. 🤪

van conversion side trim seal
van conversion side trim seal

quick look

  1. Undo torx bolts
  2. Remove side trim
  3. Remove and clean plastic clips
  4. Put clips back into side panel
  5. Add sealant to clips
  6. Reattach side trim


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September 23, 2023

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