Best Body Filler For Fiberglass (2024 Update)
If you’re looking for a high-quality way to fill cracks, gaps or holes in your fiberglass boat, car or other vehicle, you’ll need to find the best body filler for the job. With so many options on the market, it’s important to consider a few key factors to ensure you’re getting the right product for your needs.
Firstly, think about the size of the area you need to fill. Is it a deep or shallow hole? This will determine whether you need a lightweight or heavier filler. Secondly, consider the durability and flexibility of the filler. Will it need to withstand strong impacts or vibration? Look for products that offer high tensile strength and adhesion, as well as flexibility to prevent cracking or breaking.
To help you make the best decision, ask yourself some questions. Do you need a fast-drying filler or are you able to give it more time to cure? Are you using the filler on a wet or dry surface? What type of finishing work will be needed after applying the filler? By keeping these questions in mind, you can ensure you’re choosing the best body filler for your particular situation.
In conclusion, finding the best body filler for fiberglass can seem daunting, but with careful consideration of size, durability, and finish requirements you’ll be able to make an informed choice. So, before you purchase any product ensure that it meets all your requirements and ask the necessary questions needed to make a wise investment.
10 Best Body Filler For Fiberglass
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Ideal for filling and repairing cracks, holes, dents, and rust on fiberglass, metal, wood, and masonry surfaces.
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The product is ideal for filling fiberglass and sheet metal, specifically for repairing damage or gaps.
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3
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It is ideal for repairing fiberglass constructions such as cars, boats, and other vehicles.
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4
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Ideal for repairing structural damage in boats and automotive bodies, reinforced with long strand fiberglass fibers for strength.
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5
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The product is ideal for repairing fiberglass surfaces on a variety of items.
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6
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It is ideal for sanding body filler on various surfaces such as steel, fiberglass, and aluminum.
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7
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The product is ideal for hardening finishing putties and body fillers during automotive repair.
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8
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Ideal for spreading and smoothing filler on various surfaces due to its double-sided black plastic ultra-flexible material.
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9
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The product is ideal for priming and surfacing various materials such as body filler, putty, and fiberglass.
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10
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Ideal for filling and reinforcing fiberglass surfaces, providing waterproof protection and durability.
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1. Evercoat Everglass Short Strand Fiberglass Reinforced Filler – Waterproof Filler – 128 Fl Oz
Looking for a reliable and durable solution to repair your car's body? Look no further than this waterproof filler, designed to withstand the toughest conditions. Made with high-strength fiberglass reinforcement, this filler is built to last and provide effective reinforcement for holes, rusted metal, body seams, and shattered fiberglass.
This fiberglass-reinforced filler features a unique formula with short strands of fiberglass, providing added reinforcement for your repairs. It can be applied to a variety of surfaces, including steel, aluminum, fiberglass, and more, making it a versatile choice for all your automotive body repair needs.
In addition to the waterproof filler, this product line also includes high-quality putty, primer, and body filler formulations. These products have been specifically designed to work together for an effective and long-lasting repair. So, whether you're a professional mechanic or a DIY enthusiast, you can trust these products to get the job done right.
With its reliable performance and versatile applications, this waterproof filler is a must-have for anyone in the automotive repair industry. So, why wait? Order yours today and experience the difference for yourself!
2. Everocat Kitty Hair Long Strand Fiberglass Reinforced Filler For Fiberglass & Sheet Metal – 32 Fl Oz
This high-quality filler product has been designed to strengthen standard fillers with its added chopped fiberglass, making it perfect for reinforcing torn or rusted areas of sheet metal on boats and other vehicles. It is highly versatile, making it applicable on a variety of surfaces such as steel, aluminum, fiberglass, and more.
One of the standout features of this waterproof filler is its easy sanding capabilities, which make it a breeze to use with 80 grit sandpaper. This means that you can achieve a smooth finish quickly and easily, without having to spend hours sanding away.
Whether you are a professional mechanic or a DIY enthusiast, our automotive body repair products are bound to impress. We offer high-quality putty, primer, and body filler formulations that are perfect for any repair job, no matter how big or small.
In addition to its impressive performance capabilities, this filler product is also incredibly easy to apply. Simply follow the instructions provided and you'll be able to achieve professional-grade results in no time.
3. Bondo Fiberglass Filler Kit With Hardener
The Bondo Glass Reinforced Filler is a versatile repair solution that is perfect for fixing rust-out and rust hole repairs. This product is designed to cover small holes up to ½ inch without the need for backing strips, fiberglass resin, or cloth. Thanks to its unique formula, the Bondo Glass Reinforced Filler is stronger than traditional lightweight fillers, making it an ideal choice for repairing various surfaces such as metal, wood, concrete, masonry, and fiberglass.
One of the great benefits of this product is its quick dry time. It can be sanded in as little as 20 minutes, making it perfect for quick repairs. Additionally, the waterproof formula makes it an excellent solution for automotive and marine applications. The Bondo Glass Reinforced Filler is also compatible with most paints, so you can easily match the color of your repaired surface.
This product comes with Bondo Red Cream Hardener, which helps to activate the filler and ensures a strong bond. It can also be paired with body filler and glaze for complete repairs. Whether you're a professional mechanic or a DIY enthusiast, the Bondo Glass Reinforced Filler is an essential tool to have in your repair kit.
To use this product, apply it during the Fill stage of the 3M Body Repair System. The Bondo Glass Reinforced Filler is easy to work with and produces smooth, even results. With its reliable strength and versatility, the Bondo Glass Reinforced Filler is a must-have for any repair project.
4. Marine-Grade Long Strand Filler For Structural Repairs
The Pre-Thickened Fiber Reinforced Polyester Putty is an essential product for anyone looking to undertake boat building or repair projects. This high-strength structural filling, fitting, bonding, bedding, and radius forming putty is suitable for use on fiberglass, wood, metal, polyester laminates, and core materials, and can be used above or below the waterline.
Designed with premium polyester resin and long strand glass fibers, this marine filler offers excellent strength, impact resistance, and elasticity, making it ideal for bonding decks, stringers, and liners to hulls. It can also be used for filleting and bonding bulkheads, as well as filling screw holes, bolt holes, chips, and dents.
The Pre-Thickened Fiber Reinforced Polyester Putty is remarkably easy to mix and apply, with a paste-like consistency that is easy to spread and won't sag. For a 100g mass, catalyze with 1% MEKP to get 15-20 minutes of working time at 70°F. Users can adjust the amount of catalyst to control working time, making it a versatile and customizable product.
This fast-setting structural adhesive is perfect for fiberglass and gelcoat repair and can be used for cosmetic fairing. For best results, overcoat Polyester Structural Repair Putty with TotalBoat Polyester Fairing Compound, which sands smoothly and can be finished with TotalBoat Gelcoat with wax.
Available in quart and gallon kits, this product includes 2 oz. MEKP. The Pre-Thickened Fiber Reinforced Polyester Putty is a versatile bonding compound that can bond dissimilar materials and can also be used in many home, auto, construction, and aerospace applications. It won't shrink or crack, even in bulk fillings, making it an ideal choice for those looking for a reliable and durable solution for their boat building and repair needs.
5. Bondo Fiberglass Resin Repair Kit, 00422, 0.9 Quart
Introducing an effortless and effective solution for repairing holes and scratches on a variety of surfaces, including automobiles and boats – the Easy Do-It-Yourself Kit. This kit includes all the necessary items for a hassle-free repair process which can be accomplished by anyone in the comfort of their home.
The 100% waterproof seal ensures that the repaired surface will maintain its durability and longevity, even in harsh weather conditions. The strong and versatile formula of the kit enables it to be used on various surfaces, such as concrete, wood, fiberglass, and metal.
The repair process is quick and easy – the surface can be sanded in under two hours, leaving it smooth and ready for painting. The kit comes with a fiberglass resin, liquid hardener, plastic spreader, fiberglass cloth, mixing stick, and mixing tray, making it an all-in-one solution for those who want to repair holes and scratches without the hassle of buying individual items.
The Easy Do-It-Yourself Kit is perfect for DIY enthusiasts who want to save money by repairing their own surface damages. It is also a great solution for those who wish to avoid the high costs of professional repairs. The kit is user-friendly and requires no previous experience in repairing surfaces. With its easy-to-follow instructions, anyone can achieve a professional-looking repair job.
6. Evercoat Rage Optex – Sanding Body Filler For Steel, Fiberglass, Aluminum And More – 128 Fl Oz
Introducing a top-of-the-line body filler that boasts a unique formula, designed to provide optimum sanding results. This product utilizes cutting-edge EcoResin technology, making it highly effective in repairing dents, scratches, and other damages.
What sets this body filler apart from others is its color-changing technology, which indicates when the repair is ready to be sanded. This feature ensures that the repair process is efficient and accurate, saving you time and effort.
Additionally, this body filler has a non-sag formula, which means that there is no need for finishing putty. Its excellent filling properties make it easy to apply and achieve a smooth finish.
This versatile product is suitable for use on various surfaces, including steel, aluminum, fiberglass, and more. Whether you need to repair your car, truck, or boat, this body filler is sure to get the job done.
As part of our commitment to providing high-quality automotive body repair solutions, we offer a range of products, including putty, primer, and body filler formulations. Trust us to help you restore your vehicle to its original condition.
7. Evercoat Keg Blue Cream Hardener For Finishing Putties And Body Fillers – 4 Oz
The body repair tool in question is a game-changing addition to any car care kit. It has been specifically designed to accelerate the repair process and make it more efficient. With its easy-to-use features and top-notch performance, this tool is a must-have for anyone looking to get their vehicle back in top shape.
In addition to the body repair tool itself, the kit also includes body fillers, which are a necessary part of the repair process. These fillers play a crucial role in achieving better hardening results and ensuring a smooth and flawless finish.
Furthermore, the kit also includes finishing putties that can be mixed with the body fillers for even more impressive results. The combination of these two products delivers a long-lasting repair that will stand the test of time.
One of the standout features of this kit is its versatility. The products can be applied to a range of surfaces including steel, aluminum, fiberglass, and more. This makes it an ideal choice for anyone who wants to tackle a range of automotive repair projects.
8. Custom Shop 4" X 2-3/4" (Pack Of 25) Double Sided Black Plastic Ultra Flexible Filler Spreaders
Introducing the Box of (25) ULTRA THIN spreaders that are a must-have for any painter or artist who requires precision application of fillers and glazes. These spreaders come in a pack of 25 and are extremely flexible with a very sharp edge, which makes them perfect for the most delicate of applications.
These spreaders are not just limited to body filler or putty applications but can also be used for acrylic and epoxy resin pouring art, as well as spreading acrylic paint and epoxy. The versatility of these spreaders makes them a valuable addition to any artist’s toolkit.
Each spreader is double-sided, which ensures maximum use and longevity. The sharp edge on each side allows for precise application, preventing any unnecessary wastage of filler or paint. The flexibility of the spreaders also allows for easy application on curved surfaces.
These spreaders are great for epoxy resin pours and acrylic paint pouring applications. They provide the perfect tool for spreading and evening out the surface of the resin or paint, allowing for a smooth and even finish. The ultra-thin design of these spreaders ensures that there are no tell-tale marks left on the surface.
9. Evercoat Dura Build Acrylic Primer Surfacer For Body Filler, Putty, Fiberglass And More – 128 Fl Oz
Looking for a convenient solution to fix minor surface imperfections? Look no further than this Primer. Designed to easily fill grind marks, sand scratches, and other minor imperfections, this primer is perfect for anyone looking to achieve a professional-quality finish.
One of the standout features of this primer is its ease of application. With a primer gun featuring a 1.4 to 1.8 fluid nozzle or air cap, applying this primer is a breeze.
Once applied, this primer is also incredibly easy to sand. Simply use 80, 180, 220 & 320 grit sandpaper on an orbital sander, depending on the surface, and you'll be left with a smooth, even finish.
This primer is also incredibly versatile when it comes to application. Whether you're working with steel, aluminum, fiberglass, or other surfaces, this product is sure to provide great results.
Finally, if you're looking for a high-quality solution for automotive body repair, this primer is an excellent choice. With top-notch putty, primer, and body filler formulations, you can trust that this product will get the job done right.
10. Evercoat Tiger Hair – Long Fiber, Fiberglass Reinforced Filler – Waterproof Filler – 128 Fl Oz
The Waterproof Filler is an exceptional product that is made of high-strength polyester resin and is reinforced with fiberglass for added durability. This filler is perfect for those looking for a reliable solution that can withstand various weather conditions without deteriorating or losing its strength.
The Resilient Body Filler is an excellent choice for those in search of a product that can effectively bridge cracks and fill gaps. It is designed to provide a smooth, even surface that is easy to sand and paint over. This filler is perfect for repairing dents and other minor damages on your vehicle's body.
If you are looking for a rustproof body filler that can handle heavy-duty damage and bulk filling rust repairs, then look no further than our product. It is specially formulated to resist rust and corrosion, making it an ideal solution for those living in areas with high humidity or salt exposure.
Our versatile surface application makes it easy to use our products on a variety of surfaces, including steel, aluminum, fiberglass, and more. This feature makes it a must-have for those who frequently engage in automotive repair projects.
When it comes to automotive body repair, we provide high-quality putty, primer, and body filler formulations that are designed to provide the best results. Our products are easy to use and ensure a smooth finish that is both long-lasting and visually appealing.
Best Body Filler For Fiberglass FAQs
Can I use regular body filler on fiberglass?
While it is possible to use regular body filler on fiberglass, it may not be the best option. The reason being that fiberglass is a flexible material and regular body filler is not. Over time, the filler may crack or break away from the fiberglass surface due to the flexibility of the material.
To avoid this issue, it is recommended to use a filler that is specifically designed for use on fiberglass. These fillers are formulated to be more flexible, which allows them to move with the fiberglass and prevent cracking or separation.
Additionally, it is important to properly prepare the fiberglass surface before applying any filler. This includes cleaning the surface thoroughly and sanding it to create a rough texture for the filler to adhere to.
In summary, while regular body filler can be used on fiberglass, it is not the best option and may lead to issues down the line. It is recommended to use a filler specifically designed for use on fiberglass and properly prepare the surface before application.
How do I choose the right body filler for my fiberglass repair?
Choosing the right body filler for fiberglass repair requires careful consideration of several factors. Firstly, the type of repair you are undertaking will determine the type of filler you need. For small repairs, lightweight fillers like polyester putty may suffice, while larger repairs may require heavier fillers like fiberglass resin.
Secondly, consider the environment in which the repair will be made. If you are working in an area with high humidity, choose a filler that is designed to work in such conditions. Additionally, some fillers are better suited for use on vertical surfaces, while others are best for use on horizontal surfaces.
Thirdly, consider the type of finish you want to achieve. Some fillers are easier to sand than others, and some are more receptive to paint and other finishes.
Lastly, consider the brand and reputation of the filler you are considering. Look for reviews and testimonials from other users, and choose a reputable brand that has a proven track record for quality and reliability.
By considering these factors, you can choose the right body filler that will provide the best results for your fiberglass repair.
How does fiberglass body filler differ from metal body filler?
Fiberglass body filler and metal body filler are two different types of fillers used for automotive body repair. The main difference between these two fillers is the material they are made of.
Fiberglass body filler is made of fiberglass and a resin mixture, which makes it lightweight and strong. It is used to repair rust spots, dents, and holes in fiberglass or plastic body parts. Fiberglass body filler is also resistant to moisture and can be sanded and painted easily.
On the other hand, metal body filler is made of a mixture of talc, resin, and metal particles, which makes it heavier and more durable than fiberglass body filler. It is used to repair dents and holes in metal body parts and is also resistant to moisture. Metal body filler is harder to sand than fiberglass body filler, but it can be shaped and molded more easily.
In summary, fiberglass body filler is ideal for repairing fiberglass or plastic body parts, while metal body filler is best for repairing metal body parts. The choice between the two depends on the type of repair needed and the material of the body part.
How durable is fiberglass body filler compared to other types of fillers?
Fiberglass body filler, also known as fiberglass reinforced body filler, is a popular choice among auto body repair professionals due to its durability and strength. Compared to other types of fillers like plastic body filler or bondo, fiberglass body filler is highly resistant to cracking, shrinking, and warping. This is because it contains small fibers that reinforce the filler, making it more resistant to impact and stress.
In addition to its durability, fiberglass body filler adheres well to metal surfaces and can withstand exposure to moisture and extreme temperatures. It is also easy to sand and shape, making it ideal for repairing dents, scratches, and other types of damage on cars, boats, and other vehicles.
However, it is important to note that fiberglass body filler requires a bit more skill and experience to apply than other types of fillers. It is also more expensive than plastic body filler. Overall, fiberglass body filler is a reliable and strong option for auto body repairs that require high durability and strength.
How long does it take for fiberglass body filler to cure?
Fiberglass body filler is a type of automotive filler used to repair scratches, dents, and other damages on car bodies. The curing time of the fiberglass body filler depends on various factors such as temperature, humidity, and the thickness of the layer applied.
In general, fiberglass body filler takes around 20-30 minutes to dry, but it takes around 24 hours to cure completely. If you apply a thicker layer of the filler, it will take longer to cure. Additionally, the curing time also depends on the ambient temperature and humidity. Higher temperature and lower humidity can speed up the curing process.
It is important to give the fiberglass body filler enough time to cure before sanding or painting it. Attempting to sand or paint the filler before it is fully cured can cause it to crack or peel. Therefore, it is recommended to wait at least 24 hours before sanding or painting the surface.
Is it necessary to use a fiberglass repair kit with body filler?
Using a fiberglass repair kit with body filler is not always necessary, but it can be helpful in certain situations. If the area being repaired has a large hole or crack, the fiberglass repair kit can provide extra support and reinforcement for the body filler. The fiberglass material is strong and durable, and can help prevent the body filler from cracking or breaking over time.
However, if the area being repaired is small and does not require extra reinforcement, using just body filler may be sufficient. It is important to properly assess the damage and determine the best course of action for the specific repair.
Additionally, it is important to follow the instructions provided with the fiberglass repair kit and body filler to ensure proper application and curing. Using the products incorrectly can result in a weaker repair and potentially worsen the damage.
What are some tips for applying fiberglass body filler for a smooth finish?
Fiberglass body filler is a popular choice for repairing dents and dings on cars and boats. To achieve a smooth finish, here are some tips to keep in mind:
1. Prep the surface: Before applying the filler, make sure the surface is clean, dry, and free of rust or paint. Sand the area with 80-grit sandpaper to create a rough surface for the filler to adhere to.
2. Mix the filler properly: Follow the manufacturer's instructions for mixing the filler. Use a clean mixing board and a clean tool to ensure a proper mix.
3. Apply the filler in thin layers: Apply the filler in thin layers, building up to the desired thickness. Use a plastic spreader to smooth out the filler and remove any air pockets.
4. Sand the filler: Once the filler has cured, sand it down with 80-grit sandpaper. Use a sanding block to ensure a flat surface. Repeat this process with 120-grit sandpaper, then 220-grit sandpaper for a smooth finish.
5. Prime and paint: After sanding, prime the surface with a high-quality primer and let it dry. Then, paint the surface with a color-matching paint.
By following these tips, you can achieve a smooth and professional finish with fiberglass body filler.
What are the advantages of using a fiberglass-specific body filler?
Fiberglass-specific body filler is an essential material used in the automotive and marine industries. It is a two-component filler that has been specifically designed to work with fiberglass materials. There are numerous advantages of using a fiberglass-specific body filler.
Firstly, it is highly durable and can withstand harsh environments and extreme temperatures. This makes it an ideal choice for use in boats, cars, and other vehicles that are exposed to the elements.
Secondly, it is easy to use and can be shaped to fit any surface. It can be sanded, painted, and even polished to give a perfect finish.
Thirdly, fiberglass-specific body filler is lightweight, making it an excellent choice for areas where weight is a concern, such as racing cars or boats.
Lastly, it adheres exceptionally well to fiberglass surfaces, ensuring a long-lasting repair. It is also resistant to chemicals, making it ideal for use in areas where exposure to chemicals is common.
In conclusion, using a fiberglass-specific body filler has numerous advantages, including durability, ease of use, lightweight, and excellent adhesion properties.
What are the best brands of body filler for fiberglass?
When it comes to repairing fiberglass, selecting the right body filler is crucial to ensure a successful outcome. There are several brands of body filler available in the market, but not all are suitable for use on fiberglass. The best body fillers for fiberglass are those that are specially formulated to bond well with the material and provide excellent adhesion, durability, and flexibility.
Top brands of body filler for fiberglass include Bondo Fiberglass Resin, Evercoat Fiberglass Filler, 3M Marine High Strength Repair Filler, USC All-Metal Premium Aluminum Filled Auto Body Filler, and Fibreglass Evercoat 156. Each of these brands has unique features and benefits that make them stand out from others.
It's important to note that when using body fillers on fiberglass, it's essential to follow the manufacturer's instructions carefully to achieve the best results. This includes properly cleaning and preparing the surface, mixing the filler correctly, and applying it evenly. With the right brand and proper application techniques, you can achieve a smooth and seamless repair on your fiberglass.
What is the best body filler for fiberglass?
When it comes to choosing the best body filler for fiberglass, there are a few factors to consider. First, you'll want a filler that is specifically designed for use with fiberglass, as traditional fillers may not adhere properly or may shrink over time. Additionally, you'll want a filler that is strong and durable, able to withstand the stresses and strains of regular use.
One of the most popular options for fiberglass body filler is a two-part epoxy-based filler. This type of filler is known for its strength and durability, and is able to bond strongly to the fiberglass surface. It also dries hard and sandable, making it easy to shape and finish to the desired surface.
Another option is a polyester filler, which is also designed specifically for use with fiberglass. These fillers are known for their excellent adhesion and are perfect for filling in larger gaps and holes. However, polyester fillers should be used in conjunction with a fiberglass mat or cloth to ensure maximum strength and durability.
Ultimately, the best body filler for your fiberglass project will depend on your specific needs and preferences. Be sure to choose a filler that is designed for use with fiberglass and consult with a professional if you have any questions or concerns.
