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How to Repair Rv Fiberglass Exterior Damage

Repair Rv Fiberglass Exterior Damage
Photo Courtesy: El Toro RV Service

Ever wondered how to tackle RV fiberglass exterior damage with ease?

The process may seem daunting at first, but with the right guidance, it can be manageable.

From assessing the initial damage to applying the finishing touches, each step plays a crucial role in restoring your RV’s exterior to its former glory.

By following a few key steps, you’ll be equipped to handle fiberglass repairs like a pro.

Ready to learn the secrets to a seamless RV Maintenance and exterior restoration?

Assessing the Extent of Damage

When assessing the extent of damage to the RV fiberglass exterior, start by carefully examining the affected areas for cracks, chips, or delamination. These signs can indicate the severity of the damage and help determine the appropriate repair method.

Cracks in the fiberglass may vary in size, from small hairline fractures to larger, more significant splits. Chips, on the other hand, typically involve missing pieces of the fiberglass material, which can expose the underlying layers to further damage if left unaddressed.

Delamination, where the layers of fiberglass separate, is another crucial issue to look out for as it can compromise the structural integrity of the RV exterior. By conducting a thorough inspection and identifying these common forms of damage, RV owners can better understand the scope of the repairs needed to restore the fiberglass exterior to its original condition.

Gathering the Necessary Tools and Materials

To effectively repair RV fiberglass exterior damage, gather the necessary tools and materials required for the restoration process. The following items are essential for a successful repair job:

First, acquire a fiberglass repair kit containing resin, hardener, and cloth or matting. These kits are readily available at auto parts stores or online. Additionally, you’ll need safety equipment such as gloves, safety glasses, and a mask to protect yourself from harmful fumes and particles during the repair process.

Next, gather sandpaper of varying grits to smooth out the damaged area and prepare it for the fiberglass repair. You’ll also need a utility knife for cutting and shaping the fiberglass material, as well as a mixing container and stirring sticks for blending the resin and hardener.

Lastly, make sure to have a clean cloth or rag on hand for wiping down the repair area and removing any dust or debris. By having these tools and materials ready, you can proceed with confidence in repairing your RV’s fiberglass exterior damage.

Sanding the Damaged Area

Begin sanding the damaged area using coarse-grit sandpaper to smooth out any rough edges and prepare the surface for fiberglass repair. Start by gently sanding the damaged area in a back-and-forth motion, following the contours of the RV. Make sure to sand beyond the damaged area to create a smooth transition between the repaired section and the surrounding fiberglass. Take care not to apply too much pressure, as this could further damage the fiberglass.

After initially sanding with coarse-grit sandpaper, switch to a finer grit to achieve a smoother finish. This finer sandpaper will help remove any remaining imperfections and create a surface that’s ready for patching. Once the damaged area is sanded down and feels smooth to the touch, wipe it clean with a damp cloth to remove any dust or debris.

With the damaged area now properly sanded, you’re ready to move on to the next step of patching the fiberglass.

Patching the Fiberglass

After the damaged area has been thoroughly sanded and cleaned, apply a layer of fiberglass resin to begin patching the fiberglass. This resin will act as the foundation for the repair.

Cut a piece of fiberglass cloth or matting to fit the damaged area with some overlap. Place the fiberglass cloth over the damaged area and saturate it with more resin, ensuring it fully adheres to the surface. Smooth out any air bubbles or wrinkles using a brush or roller. Allow the resin to cure according to the manufacturer’s instructions; this usually takes a few hours.

Once the fiberglass patch has hardened, sand the area lightly to remove any rough edges or excess resin. Check the patch for any imperfections or low spots. If needed, apply another layer of resin and fiberglass cloth to build up the repair. Repeat the curing and sanding process until the patch is level with the surrounding surface. This step ensures a seamless finish before moving on to painting and finishing touches.

Painting and Finishing Touches

Once the fiberglass patch has been leveled with the surrounding surface, the next step involves preparing the surface for painting and adding finishing touches. Before painting, it’s crucial to clean the repaired area thoroughly to remove any dust or residue. Use a mild detergent and water to clean the surface, followed by a wax and grease remover for a final clean before painting. Once the area is clean and dry, masking off any areas that don’t require painting is essential to ensure a clean finish.

When it comes to painting, choose a high-quality gel coat that matches the color of your RV. Apply the gel coat evenly over the repaired area using a paint sprayer or a brush, following the manufacturer’s instructions for the best results. After the paint has dried, sand the area lightly with fine-grit sandpaper to smooth out any imperfections. Finally, apply a layer of automotive wax to the painted area to protect the finish and give it a glossy appearance. These finishing touches won’t only make your RV look as good as new but also help protect the repaired fiberglass from future damage.


In conclusion, RV Repair is a manageable task with the right tools and materials. By assessing the extent of the damage, sanding the area, patching the fiberglass, and painting, you can restore your RV’s exterior to its former glory.

Remember to take your time and follow the proper steps to ensure a successful repair job. With a little effort, your RV will be looking good as new in no time.

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