Forest River Slide Out Seals: Maintenance, Repair, & Replacement

Forest River is a renowned manufacturer of recreational vehicles (RVs), and their slide-out seals are crucial components that help to keep the interior of the RV dry and protected. Over time, these seals can wear out or become damaged, leading to leaks and potential water damage inside the vehicle. In this comprehensive guide, we will explore the importance of maintaining and repairing Forest River slide out seals. We will also provide practical solutions for maintaining the seals and offer tips for troubleshooting and fixing common seal issues.

Understanding the Role of Forest River Slide-Out Seals

Slide-out seals are rubber or foam strips located on the sides and bottom of the slide-out room. Their primary purpose is to create a weather-tight seal when the slide-out room is extended, preventing water, dirt, and pests from entering the RV. These seals also help to insulate the interior, keeping it cool in the summer and warm in the winter. Without properly functioning slide-out seals, an RV can experience leaks, drafts, and potential damage to the interior.

Types of Slide-Out Seals:

The most common types of seals used in Forest River RVs are:

  • Bulb Seal: The most common type of slide-out seal is the bulb seal, which consists of a hollow rubber tube with a bulbous shape. This seal is designed to compress against the RV wall when the slide-out room is retracted, creating a tight seal. When the slide-out is extended, the bulb seal expands to create a weatherproof barrier.
  • Wiper Seal: Wiper seals are typically located on the top edge of the slide-out room and act as a barrier against water and debris. They are flat or slightly curved and sweep away any water or debris on the roof of the slide-out as it retracts.

Maintenance Tips for Slide-Out Seals

Proper maintenance of slide-out seals is essential to ensure their longevity and effectiveness. Here are some practical tips to keep your Forest River slide-out seals in excellent condition:

  • Regular Cleaning: Clean the slide-out seals regularly using a mild soap and water solution. Remove any dirt, debris, or residue that may have accumulated on the seals. Avoid using harsh chemicals or abrasive cleaners as they can damage the seals.
  • Lubrication: Apply a silicone-based lubricant to the slide-out seals to keep them pliable and prevent them from drying out. Lubrication helps to maintain the flexibility of the seals and prevents cracking or tearing.
  • Inspection: Periodically inspect the slide-out seals for signs of wear, damage, or deterioration. Look for cracks, tears, or gaps that may compromise the integrity of the seal. Promptly address any issues to prevent further damage and leaks.

Troubleshooting Common Slide-Out Seal Issues

Despite regular maintenance, slide-out seals can sometimes develop issues. Here are some common problems and practical solutions for troubleshooting them:

  • Seal Compression Issues: If the slide-out seals are not compressing properly when the slide-out room is retracted, it may result in a poor seal. Check for any obstructions, debris, or misalignment that may be preventing the seal from compressing. Clear any blockages and ensure that the slide-out room is properly aligned with the RV wall.
  • Seal Leakage: If you notice water entering your RV when it rains, it may indicate a seal leakage. Inspect the seals for any cracks, tears, or gaps. Apply a sealant specifically designed for slide-out seals to fill any gaps or repair small tears. For significant damage, it may be necessary to replace the entire seal.

Repairing Slide-Out Seals

In some cases, repairing or replacing the slide-out seals becomes necessary to maintain the integrity of the RV. Small tears or gaps in the seals can often be repaired using a sealant designed for slide-out seals. Clean the area thoroughly, apply the sealant, and allow it to dry completely before testing the seal for leaks.

Forest River Slide Seal Replacement

If the seals are severely damaged, it is best to replace them entirely. Start by removing the old seals, ensuring that you clean the area thoroughly. Measure the dimensions of the old seals to ensure a proper fit and purchase replacement seals from a reputable RV parts supplier. Install the new seals carefully, making sure they are aligned correctly and provide a tight seal.

Here’s a step-by-step guide on how to replace worn-out or damaged Forest River slide-out seals:

Step  1: Gather the Necessary Tools and Materials

  • Replacement slide-out seals (ensure they are the correct size and type for your RV model)
  • Utility knife or seal removal tool
  • Silicone-based lubricant
  • Mild soap and water solution
  • Clean cloth or sponge
  • Sealant designed for slide-out seals
  • Measuring tape
  • Screwdriver or drill (if needed for removal or installation)

Step 2: Prepare the Work Area

  • Park your RV on a level surface and ensure that the slide-out room is fully retracted.
  • Disconnect any power or hydraulic connections to the slide-out room, if applicable, for safety.

Step 3: Remove the Old Seals

  • Use a utility knife or seal removal tool to carefully cut and remove the old seals. Take care not to damage the RV wall or the slide-out room during this process.
  • Clean the area thoroughly using a mild soap and water solution to remove any dirt, debris, or adhesive residue.

Step 4: Measure and Prepare the Replacement Seals

  • Using a measuring tape, carefully measure the length and width of the old seals to ensure a proper fit.
  • Trim the replacement seals to the appropriate size using a utility knife or scissors, if necessary. It is better to trim a bit at a time to ensure an accurate fit.

Step 5: Apply Lubricant

Before installing the replacement seals, apply a silicone-based lubricant to the surface of the slide-out room where the seals will be placed. This lubrication will help the seals slide smoothly during operation and prevent them from drying out.

Step 6: Install the Replacement Seals

  • Starting from one end, position the replacement seal along the edge of the slide-out room. Ensure that it aligns properly with the RV wall and covers the entire length.
  • Press the seal firmly against the RV wall, making sure it adheres securely. Repeat this process for the other sides and the bottom of the slide-out room.
  • For a more secure attachment, you can use a screwdriver or drill to install screws or fasteners along the seal at regular intervals, following any specific instructions provided by the seal manufacturer.

Step 7: Test the Seals

Once the replacement seals are installed, extend the slide-out room fully and inspect the seals for proper alignment and compression. Ensure that they create a tight and weatherproof seal against the RV wall.

Test the slide-out room by retracting and extending it a few times to check if the seals function smoothly and effectively.

Step 8: Apply Sealant (if necessary)

If there are any gaps or areas of concern where the seals meet the RV wall or slide-out room, apply a sealant specifically designed for slide-out seals. Follow the manufacturer’s instructions for proper application and drying time.

Step 9: Clean Up

  • Clean any excess lubricant, sealant, or debris from the area surrounding the seals using a clean cloth or sponge.
  • Dispose of the old seals properly and ensure that the work area is tidy and free from any potential hazards.

By following these steps, you can replace worn-out or damaged Forest River slide-out seals and restore the integrity and functionality of your RV’s slide-out room. Remember to refer to the specific instructions provided by your RV manufacturer or the seal manufacturer for any additional guidance or recommendations.


Maintaining and repairing Forest River slide-out seals is crucial for the longevity and functionality of your RV. By following proper maintenance practices, conducting regular inspections, and addressing any issues promptly, you can ensure that your slide-out seals continue to provide an effective barrier against the elements. In cases where repairs or replacements are necessary, it is essential to follow the recommended steps and use high-quality sealants and replacement seals. By taking these proactive measures, you can enjoy a dry, comfortable, and leak-free RV experience for years to come.

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