How to Repair Roof Boxes in a Car? Step by Step (2023)

To repair roof boxes on a car, start by cleaning the box thoroughly and assessing the damage. Depending on the issue, you might need to fix cracks with adhesive or tape, replace broken parts, or tighten any loose fixtures to ensure a secure fit.

How to Repair Roof Boxes in a Car?

Owning a car is always a superior experience, isn’t it?! There’s no doubt about it! You’ll always feel an extra adventurous feeling by having a car. However, as they get older, things get change significantly. One of the changes can appear in the car’s roof boxes. Further, it can damage over time. But, you can fix it by yourself if you know some basic rules of the vehicle.

Car roof boxes are positioned on the roofs of the automotive and used for storage. Besides, they are exposed to the ingredients and residues. For this reason, their condition vandalizes with time. By following some moves, you can okay them quickly.

In this article, we’ll talk about how to repair roof boxes in the car – some easy steps. Let’s go –

Car Roof Box Repair – Some Simple Steps to fix it

What’s your take on repairing a car’s roof box? Is it too complicated a task?! Absolutely not! The equipment needed for repairing jobs is available in hardware stores. Therefore, you don’t have to take the extra burden on it. Now, let’s check out the procedures for fixing the roof box in the car –

Step 1 – Sand the Place

Find out the crack inside of the car’s roof box. Then, start sanding the whole place around it. But, which element should you use? Our recommendation is coarse-grit sandpaper. The fiberglass will adhere closely to this thing.

Step 2 – Cleanse the Place Properly

It is necessary to cleanse the whole place properly with clean water or alcohol. Otherwise, you can’t expect a strong bond with the roof box.

Step 3 – Heat the Thing!

It’s time to heat up! Allow the propane torch to get over the surface. When the flame can touch the surface, it will erode the area and remarkably enhance the overall adhesion. Therefore, the adhesive’s adhesion improves outstandingly and gets a special coating.

Step 4 – Mix the Epoxy

Now, it’s the mixing time of the epoxy. However, make sure that the percentage is exactly the package suggested. A small batch of epoxy is enough. Then, you have to mix it accordingly. Keep the mixed ingredient on a disposable paper plate.

Step 5 – Apply the Epoxy

Apply a small amount of epoxy to the sanded area of the roof box. After that, place some lightweight fiberglass fabric over the rift. Henceforth, it will be best if you can remove the air bubble from the fiberglass. This is how it can work properly.

Step 6 – Repeating the Procedure

Take another batch of fiberglass and repeat the whole procedure with epoxy one more time. After putting the fiberglass fabric in the wet adhesive, spread the entire thing with a spreader thoroughly. Nevertheless, don’t rush while doing it. Otherwise, things could go wrong.

On the other hand, if there are more layers, keep redoing the process.

Besides, take time to cure for around 10-12 hours. To finish it in a sophisticated way, you can consider painting.

Warning Message – While mixing the epoxy, better wear gloves in your hands. Epoxy can be dangerous to the skin and taking precautions is necessary.

Waterproof Cargo

How to Resist the Roof Box Leak in the Car?

There are various reasons that roof boxes can get leaked. To prevent it, you can take some practical measurements. Let’s check out –

  • Rust is the common enemy of a vehicle. The rust and corrosion can cause massive damage to the roof box in the car. Therefore, you should clean it regularly.
  • The roof area needs to be painted periodically. Yes, cleaning is essential. But, keep remember that just cleaning isn’t enough for your roadster’s roof box. As a result, polishing is a must. This is how a car’s roof box can get protection from rain, snow, extreme heat, and other natural threats.
  • Be careful when installing a roof box. Sometimes, the box fails to fit inside of the car correctly. For this reason, substantial damage can happen to the box. So, beware of this and establish the box accurately inside a vehicle.

Some Important Roof Box Safety Tips

A road trip is always enjoyable. But, being stuck in a car for hours with little room for movement can bring an unpleasant situation. That’s why loading up a roof box with belongings can help immensely. Nevertheless, adding a load to the top of the car could be risky.

Therefore, here’s something you have to know before making your entry into the road –

Weight 

During making a plan on rooftop packing, it’s better to know the weight limit of the rooftop and vehicle. Do you have to pack a lot of belongings? Hmm. So, knowing the weight could ensure that you’re on a correct path. Remember that being overweight could lead to a severe accident.

Balance

A well-packed roof box generally increases the center of gravity of the car. For this reason, the vehicle can wobble at high speeds. As a result, there’s a big chance the load can fall into it and cause unimaginable problems while driving. So, a balance is needed.

Ensure that the box is well-balanced while it carries your properties.

Installing in the Box

Sometimes, cars come with a roof box. But, if the vehicle doesn’t come with it, you have to purchase and install the product. Moreover, you have to ensure that the box perfectly fits the car. Generally, the roof box comes with a connecting point. Besides, you can join this point with the car.

But, if the point can’t be attached to the car’s roof, it will cause a massive problematic situation. To skip such an unwanted condition, you can take advice from an auto professional.

How to Repair Roof Boxes in the Car? – FAQs

Can the roof box damage my car?

If you can set the box accurately as per the suggestion of the manufacturing company, you won’t face a problem and there’s no chance that the box could damage your car.

What is the best place for a roof box in a car?

Try to distribute the weight equally as possible you can. If you feel that the load is much heavier, you can keep some more oversized items in the backseat of your vehicle. On top of that, you have to ensure adequate airflow around the box. Therefore, the box should stay closer to the back of the car rather than in front.

Final Thoughts

So, this is our discussion on how to repair the roof boxes in the car – some easy steps. Although these formulas are pretty effective for repairing roof boxes, you can consult with a professional if enormous damage occurs. However, we think prevention is the best measurement when it comes to leaking.

Thank you for reading! Until next time, goodbye!

-our editorial board has reviewed this article and has been approved for publication according to our editorial policy.

Best Seller List of Roof Cargo Boxes:

Bestseller No. 1
JEGS Rooftop Cargo Carrier for Car Storage - Large Roof Rack Cargo Carrier - Heavy Duty Weatherproof...
  • Secure & protect your gear in this 18 cubic ft. HDPE plastic hard shell vehicle cargo carrier; high-capacity interior dimensions 57 L x 38 1/2 W x 17 3/4 H inches; aerodynamic design for fuel efficiency
  • Weatherproof storage for your luggage with a four corner locking system, front latch, and weather-tight seal for ultimate car rooftop protection and security
  • Easy & convenient loading and unloading from either side of the car make for smooth travel and hassle-free storage
  • No tools required, easy assembly and installation. All mounting hardware and simple instructions are included to get you safely on the road quickly. The base is pre-drilled for 24in crossbar spacing - if your vehicles crossbars are NOT adjustable the plastic base can be re-drilled to match your vehicle (20in to 30in bar spacing)
  • Made in USA, limited lifetime guarantee. The JEGS car top carrier’s high-quality construction and performance give you peace of mind
  • Comfortably Holds 3 golf bags, up to 5 if stacked depending on size.
Bestseller No. 2
SportRack Vista XL Rear Opening Cargo Box,Black
  • 18 cubic foot (510 L) internal cargo capacity
  • Made from durable UV-resistant ABS material
  • Rear opening for easy access away from traffic
  • Tool-free mounting hardware for easy installation and removal
  • Includes key and lock to secure contents in the box, and the box to your rack
  • Fits SportRack Rack Systems, square bars, round bars and most factory racks (check fit guide)
  • Dimensions (LxWxH): 63 x 38 x 19 in / 160 x 96.5 x 48 cm
  • Min-Max Crossbars Spacing: 23 5/8 - 29 3/4 in (60 - 75.5 cm)
  • Max Weight Capacity: 100 pounds (45 kg)
Bestseller No. 3
Rooftop Cargo Carrier for Car Storage Large Roof Rack Weatherproof Cargo Carrier | Made in USA |18...
  • Durable all-seasons HDPE material construction: Built with high-density polyethylene (HDPE), this product is designed to withstand extreme weather conditions, ensuring year-round durability.
  • No tool assembly: Easily assemble without the need for tools, offering a quick and hassle-free installation process.
  • Fits most OE and aftermarket cross rails: Engineered to fit a wide range of original equipment (OE) and aftermarket cross rails for versatile compatibility.
  • All mounting hardware included: Comes with all necessary mounting hardware, so you have everything needed for installation right out of the box.
  • Made in the USA: Proudly crafted in the USA, ensuring superior quality and craftsmanship.
  • Lifetime warranty: Backed by a lifetime warranty, offering long-term peace of mind and confidence in your purchase.
  • 18 cubic-foot capacity with 110 lb storage limit: Spacious design offers 18 cubic feet of storage with a sturdy 110 lb weight capacity, providing ample room for your gear and essentials
SaleBestseller No. 4
Auto Dynasty Heavy Duty Hard Shell Roof Top Mount Car Storage Travel Luggage Box Cargo Carrier with...
  • ▶️ This roof top storage box is universal fit for mounting to max 13 inches wide cross bar, please check the dimension before purchase.
  • ▶️ The package comes with [1] 53 inches length storage box, [2] security lock key, and [4] heavy duty tool free installation mounting brackets.
  • ▶️ It is constructed of rugged, impact-resistant ABS material to ensure a long lasting life in outdoor conditions. More, it can open from the side and stay open till you close it with the strong support arm.
  • ▶️ Opens on the passenger side to 14 inches wide to store bulky items from the side and stays open till you close it, and it is very easy to install without any tool required to assembly.
  • ▶️ Overall Dimensions: 53" L x 34" W x 15" H | Capacity: 11 Cubic Feet and up to 110 LBS
Bestseller No. 5
VEVOR Rooftop Cargo Carrier, 22 Cubic Feet Roof Cargo Box, ABS Hard Shell Roof Box, with Dual-Sided...
  • 22 cu.ft / 562 L Capacity: The rooftop cargo box maximizes roof space, providing extra spacious storage. It supports a max load of 165 lbs and includes two straps to securely fasten items inside, meeting diverse storage needs.
  • Compatible with Various Crossbars: Fits crossbar installation center distances of 20.8-40.5 inch / 529-1028 mm. Includes complete installation tools, no drilling required. Features bottom metal bars for enhanced stability.
  • Dual Opening & Dual Locking: Equipped with anti-theft locking devices on both sides, allowing access from either side. Six locking points enhance security, while sturdy support arms keep the box open until closed for convenient access.
  • Upgraded Thickened ABS Shell: Enhanced thick ABS material offers impact resistance, waterproof, rust-resistant, and heat-resistant properties. Suitable for outdoor use in various weather conditions, it withstands bumps and prolonged use without damage or deformation.
  • Reduced Wind Resistance and Noise: Streamlined aerodynamic design reduces drag and wind noise, ensuring a smoother driving experience.
SaleBestseller No. 6
DNA MOTORING Rooftop Cargo Box Carrier Lockable Heavy Duty Car Top Storage Case, Capacity 110 Lbs,...
  • 【UNIVERSAL】This extra long rooftop cargo carrier fits for vehicles with cross bars only, no tool assembly & installation. Increases vehicle cargo space without impeding on passenger comfort.
  • 【LARGE CAPACITY】Rooftop cargo box provides 11 cubic feet of additional storage space. The maximum storage capacity of 110lbs when evenly distributed. And it can be opened up to 14" wide to store bulky items.
  • 【ROBUST DESIGN】Constructed of rugged, impact-resistant ABS material for long-lasting durability, able to protect your contents from exposure to the inclement weather.
  • 【SECURITY LOCKING SYSTEM】Includes key and lock to secure valuables in the box, to ensure cargo safety and s proper lid alignment. It can open from the side and stays open til you close it.
  • 【SPECIFICATION】Size: 11 Cubic Feet Internal Storage, 110lbs Max Capacity | Overall Dimensions: 53" L x 34" W x 15" H | Surface Finish: Black Texture Finish
SaleBestseller No. 7
TUFFIOM 13.4 cu.ft. Rooftop Cargo Box w/Keys, Hard Shell Waterproof Travel Roof Storage Cargo...
  • DUAL-SIDE OPENING FOR EASY ACCESS: Dual-side opening design allows you to open it from either the driver side or the passenger side, which brings more convenience for loading and unloading. (NOTE: There is protective film on the lid. Please peel off the film before use.)
  • FAIR CAPACITY: With 13.4 cubic feet maximum storage capacity and 150lbs loading capacity, the roof cargo carrier can allow for more space in your car. What’s more, its streamlined design will reduce drag and noise during driving.
  • LOCKING SYSTEM FOR SAFETY: It is designed with locks on both sides and comes with keys for protecting your valuables. And the stiffeners at the bottom of the roof cargo box strengthen its stability.
  • EASY TO INSTALL: It is simple in structure and light in weight (approximately 24.25lbs). It won’t be difficult for you to lift it and install it to your car. And it can work with most vehicles with crossbars, such as car, suv, van, etc. Applicable Cross Bar: Max. Width 2.36”. Max. distance between bottom holes for installation: 40.94”. Min. distance between bottom holes for installation: 15.35”.
  • QUALITY MATERIAL FOR DURABILITY & BETTER PROTECTION: Made from ABS material for long-lasting use. And it can protect your luggage or equipment from being exposed to sun, rain or dust. And it is protected with 3-Year Warranty.
Bestseller No. 8
GarveeTech Rooftop Cargo Box Carrier,Dual-Side Opening Roof Mount Travel Luggage Storage...
  • 【DURABLE CONSTRUCTION】Crafted from high-quality ABS material, the hard shell rooftop cargo box ensures long-lasting durability. Its waterproof and UV-resistant design protects luggage from various weather conditions, making it ideal for road trips. The aerodynamic shape also reduces fuel consumption and noise for a smoother ride
  • 【SPACIOUS 14 CUBIC FEET STORAGE】With dimensions of 62.2"L x 31.5"W x 13.4"H, the rooftop cargo box offers 14 cubic feet (390L) of extra storage space. With a maximum capacity of 165 lbs, it significantly increases storage capacity for your belongings
  • 【UNIVERSAL FIT】Compatible with all vehicles equipped with a roof rack, including cars, vans, and SUVs. Prior to purchase, please verify compatibility by checking the roof rack fitting guidelines
  • 【CONVENIENT DUAL-SIDED OPENING】The dual-sided opening system allows easy access from both sides of the cargo box. Includes 2 keys and 2 straps for added security. Ensure one side is locked when opening the other side
  • 【RELIABLE WARRANTY】MAROUTE is committed to delivering high-quality products and meeting customer expectations. Enjoy a one-year warranty for added peace of mind. For any inquiries, our team is available to assist you within 24 hours
Bestseller No. 9
VISRACK Hard Shell Roof Cargo Box Carrier with Security Keys,Heavy Duty Waterproof Rooftop Storage...
  • This car roof box is manufactured from sturdy ABS and PMMA material for long-lasting use and shiny, able to protect your valuables from exposure to the elements and can load 130 lbs capacity, suitable for round, square and most aerodynamic bars.
  • 15.5 Cubic Feet Cargo Box with Car Trunk Organize,With the large capacity, the roof cargo box can help you securely carry 15.5 cubic feet worth of essentials, can increase vehicle cargo space without impeding on passenger comfort!
  • Convenient loading and unloading of your gear from both sides of the cargo box. Dual side opening also helps with easy mounting and demounting the carrier from your vehicle.
  • The package comes with 58.3 inches length storage box,security lock key,tool free installation Mounting Brackets. (Note: The key can only be removed after the cover is closed and locked.)
  • Opens on the passenger side to 14.5 inches wide to store bulky items from the side and stays open till you close it, and it is very easy to install without any tool required to assembly.
SaleBestseller No. 10
VEVOR Rooftop Cargo Carrier, 18 Cubic Feet Roof Cargo Box, ABS Hard Shell Roof Box, with Dual-Sided...
  • 18 cu.ft / 488 L Capacity: The rooftop cargo box maximizes roof space, providing extra spacious storage. It supports a max load of 165 lbs and includes two straps to securely fasten items inside, meeting diverse storage needs.
  • Compatible with Various Crossbars: Fits crossbar installation center distances of 20.8-40.5 inch / 529-1028 mm. Includes complete installation tools, no drilling required. Features bottom metal bars for enhanced stability.
  • Dual Opening & Dual Locking: Equipped with anti-theft locking devices on both sides, allowing access from either side. Six locking points enhance security, while sturdy support arms keep the box open until closed for convenient access.
  • Upgraded Thickened ABS Shell: Enhanced thick ABS material offers impact resistance, waterproof, rust-resistant, and heat-resistant properties. Suitable for outdoor use in various weather conditions, it withstands bumps and prolonged use without damage or deformation.
  • Reduced Wind Resistance and Noise: Streamlined aerodynamic design reduces drag and wind noise, ensuring a smoother driving experience.

Last Update : 2025-02-04

Automotive products are like an addiction to me. Years ago, I started my job at a Roof Box installation co. Then I realized that I have a passion for cars. It is a perfect scope to share my different experiences about automotive products.

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