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Stop the Leak! The Ultimate DIY Fix for Your VW T5/T6 Sliding Window Gasket

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Is your VW T5 or T6 suffering from leaky sliding windows? You're not alone. This frustrating issue affects thousands of van owners — and it’s more than just a nuisance. From soggy interiors to corroded blinds, this factory design flaw can cause real damage over time. The good news? We’ve got a simple, cost-effective DIY solution that doesn’t involve replacing the entire window.

The Problem: VW T5/T6 Sliding Window Leaks

If you own a VW T5, T5.1, T5.2, or T6, chances are your sliding window gasket has started leaking — usually within just 1-2 years after leaving the factory. According to VW, the gasket isn’t replaceable. Their solution? Replace the entire window unit. That’s expensive, and worse — it’s only a temporary fix. The new window is likely to leak again after another year or two.

The Consequences of Leaky Windows

Water ingress isn’t just annoying; it’s damaging:

  • Blinds begin to rust

  • Mold develops in damp corners

  • Window rails can separate from the glass

  • Replacement costs add up fast (up to €200+ per side)

Van owners on forums like T6Forum and Reddit have been vocal about this issue, with many searching desperately for a long-term fix.

Our Solution: Thicker, Replaceable Sliding Window Gasket

At MatthewNavis.com, we’ve engineered a better gasket — one that fits snugly, lasts longer, and most importantly, can be replaced without buying a whole new window.

Benefits:

  • Replaceable: No need to throw out your window

  • Thicker seal: Designed to resist leaks longer than OEM

  • DIY-friendly: Easily installed with basic tools

  • Budget-wise: Save hundreds by skipping full window replacement

 

DIY Installation – Step-by-Step

We've created a full video tutorial showing exactly how to do this yourself: Watch Now

Here’s a quick rundown of the process:

  1. Remove the sliding window using a screwdriver to release locking pins.

  2. Pull out the old gasket (it may be glued down in some spots).

  3. Clean both the frame and the window thoroughly.

  4. Fit the new gasket, pressing it into the grooves around the edge.

  5. For any sections without a groove, cut and glue the gasket with silicone.

  6. Let it set with tape, reinstall the window, and test it — even with a pressure washer!

Real-World Results

We tested our gasket in a car wash under high-pressure jets. The result? 95% improvement compared to the stock seal. Even in extreme conditions, the new gasket holds tight, keeping your interior dry and your van protected.

Get Yours Today

Say goodbye to water damage and expensive replacements. Upgrade to a gasket that actually lasts.

🛒 Purchase VW T5 T5.1 T6 modified sliding window gasket for leaky windows 2005-2019 years

Use code: 10matt for a 10% discount

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