What’s Causing The Weather Stripping On My RV Windows To Shrink?

While they may have been warned, many recreational vehicle owners don't believe that the window weather stripping on their campers will shrink. The sad, hard truth of the matter is that it can, and if you don't take the proper preventative measures, yours will. All RV window seals will gradually shrink over time, with some shrinking faster than others.
What's Causing The Weather Stripping On My RV Windows To Shrink?

Why Is the Window Weather Stripping on My RV Shrinking?

If you’ve noticed gaps forming around your RV windows, chances are your weather stripping is shrinking. This small but essential component helps keep out dust, water, and drafts, ensuring a comfortable and well-sealed interior. But why does it shrink, and what can you do to prevent or fix it? Let’s take a closer look.

Why Does RV Window Weather Stripping Shrink?

Several factors can contribute to the shrinking of weather stripping over time.

Here are the most common causes:

1. Exposure to UV Rays

Your RV spends a lot of time outdoors, meaning its rubber and vinyl components are constantly exposed to sunlight. UV rays break down these materials, causing them to dry out, crack, and shrink.

2. Temperature Fluctuations

Extreme heat and cold can cause rubber seals to expand and contract repeatedly. Over time, this cycle leads to permanent shrinkage, leaving gaps around your windows.

3. Age and Wear

Like any part of your RV, weather stripping has a lifespan. As it ages, it naturally loses its flexibility and elasticity, making it more prone to shrinking and cracking.

4. Chemical Exposure

Certain cleaning products or environmental pollutants can degrade the rubber or vinyl material, accelerating the shrinking process. Using the wrong cleaners can cause seals to dry out faster than usual.

5. Poor Installation or Low-Quality Materials

If your RV’s weather stripping wasn’t installed properly or was made from lower-quality materials, it may shrink or deteriorate faster than expected.

How to Fix and Prevent Shrinking Weather Stripping

1. Regular Maintenance

Inspect your weather stripping at least once a season. Clean it with a mild soap and water solution and apply a rubber protectant to keep it flexible.

2. Use UV Protectants

Invest in a UV protectant spray designed for rubber seals to help shield them from sun damage.

3. Replace Old Weather Stripping

If your seals are already shrunken, cracked, or brittle, replacement is the best option. Measure carefully and choose high-quality weather stripping to ensure a proper fit.

4. Store Your RV in a Covered Area

If possible, keep your RV in a garage or under an RV cover when not in use. This minimizes direct sunlight exposure and temperature fluctuations.

5. Choose the Right Cleaning Products

Avoid harsh chemicals like alcohol-based cleaners or petroleum-based products, as they can dry out rubber seals. Instead, use a silicone-based lubricant or rubber conditioner to keep them supple.

Why Choose The RV Shop?

At The RV Shop, we are committed to delivering world-class service. We provide:

  • Mobile Repair Services: Can’t make it to our shop? No problem. We’ll bring our RV repair expertise directly to you—whether you’re at home, at a campground, or in storage—to perform on-site repairs.
  • Highly Skilled Technicians: Our skilled technicians are equipped to diagnose and repair a wide range of issues, ensuring your RV stays functional and comfortable.
  • World-Class Customer Service: We know RV repairs can be stressful, which is why we provide transparent, professional, and results-driven services to minimize your downtime and maximize your comfort. Your repair satisfaction is our top priority.

Contact Us

Don’t ignore shrunken or cracked weather stripping—it can lead to water leaks, drafts, and higher energy costs when heating or cooling your RV. Stay ahead of the problem with regular inspections and maintenance! If you’re unsure how to replace your weather stripping or need assistance, The RV Shop is here to help! With The RV Shop’s Mobile RV Repair Services, you get expert repairs, convenience, and peace of mind—wherever you are.

Need mobile RV repair? Contact The RV Shop today and let us help keep your journey moving forward!

 Request An Appointment Online Today!

📞 Call us at (302) 305-6833.

📍 Visit us at The RV Shop, 3039 Bowlarama Drive, New Castle, DE 19720.

🚐 We also offer Mobile RV Repair for your convenience!

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