RV Guides

RV Window Seals Shrinking: Why and How to Protect it?

rv window seal shrinking

Seals may begin to shrink as they age for a variety of causes, resulting in leaky and drafty windows. During rainstorms, the window’s shrinking seals will allow water to seep. They also generate fogs in the windows throughout the winter, as if that wasn’t bad enough. Don’t be concerned. Relax, I’ve got you covered. I’ve explored some basic solutions in this article to assist you in quickly resolving this issue.

Why Do RV Window Seals Shrink?

Age, humidity, sunlight, incorrect installation, and general wear and tear all cause RV window seals to shrink. Temperature variations and natural sunlight exposure can cause these rubber seals to dry up or disintegrate, causing them to shrink.

There are a few things you can do to assist protect your seals from these elements, which we’ll discuss further down. Wind, severe rains, bumps in the road, and other factors can jar window seals and gaskets free over time.

If you have a new RV and the window seals are shrinking, it could be due to faulty installation. Check your car’s warranty to verify if the seal is covered before attempting to repair it.

RV owners frequently experience problems with their water pumps or other electronic components. With a little thought and effort, you can easily repair these.

However, if your window seals are deteriorating, you may want to reconsider your purchase. When you’re out on a ride, they’re easy to spot. But how, you might wonder? If the seals are loose, the window will actually inform you. However, in order to understand, you must first comprehend the language.

As if it wasn’t bad enough, the windows let water in because the seals aren’t very good. As a result, washing the RV isn’t such a pleasant process. Furthermore, if you are stranded in the rain, all of the water will enter your RV through the windows.

Brief Summary of the Causes:

You could assume an RV is unglued if you notice the seals shrinking inside. However, such is not the case in this case. RV window seals can deteriorate for a number of reasons; here are a summary of the causes as to why do RV window seals deteriorate:

  •  As the seals grow older, their pressure begins to lessen.
  • The rubber of the seals shrinks as they age. As a result, the pressure reduces.
  • The seals can shrink as a result of temperature changes and fluctuations.
  • Shrinkage will also occur if high-quality seals are not used

How to FIx the Seal?

1. Apply heat to the seal

Applying heat to the dried-up, shrunken seal and stretching it back out is another option. If you apply too much heat to the seal, it may become damaged. Tip: Even if you use the hairdryer approach, it’s a great idea to spray the seal with Protectant Spray to help protect it from the environment and prevent it from deteriorating.

2.Try to Stretch the Seal

Window seals are prone to drying out and shrinking. So, before you replace the complete seal, we propose that you: The window’s deteriorating seal should be removed. Spray the seal with a good amount of Protectant Spray. As you stretch out the seal, rub the spray into it. Change the seal if necessary.

How to Protect Window Seals from Shrinking?

If you’ve ever had to deal with your window seals deteriorating and needing to fix the problem manually (or pay a lot of money to have it done), you definitely wouldn’t want it to occur over and over again.

1. Avoid exposure to certain elements

The seals on your windows weaken over time due to temperature changes, rainfall, and sunlight.

  • When your RV is not in use for an extended period of time, store it in a covered, dry location to prevent seal deterioration from the elements.
  • If at all possible, keep it inside during inclement weather.
  • When feasible, park your RV in the shade or out of direct sunlight.

2. Proper Seal Maintenance

Protect your seals by wiping them on a regular basis and spraying them with a protectant such as Protectant Spray. So that you don’t forget, make this routine maintenance a part of your camper de-winterization practice. Keep your RV window seals in good working order with a little know-how and basic maintenance.


Carl Walker
the authorCarl Walker
Carl is an avid adventurer who goes everywhere with his backpack. He would choose his SwissArmy knife over his handphone if he is lost in the forest. Living in an RV is his dream life and he blogs all about it on RV Living.