Home » Gluing Fiberglass – Everything You Need to Know

Gluing Fiberglass – Everything You Need to Know

If you’re a DIY enthusiast, you know finding adhesives for fiberglass and plastic is tough. If you’re not, the fact may come as a surprise to you.

Plastic and fiberglass, on the other hand, are two materials that are quite distinct. Fiberglass is usually a type of reinforced plastic with glass fiber added to the mix. Later we’ll delve into it in further depth.

Even though that is the case, both materials have smooth surfaces with none of the adhesives sticking.

However, finding the finest adhesive for fiberglass and composite materials is now a difficult task. Continue reading to understand why you should use sealants specifically formulated for the substance.

Gluing Fiberglass

What is Fiberglass

Gluing Fiberglass
Fiberglass is a famous word that has come to be so well-known that people typically only think of one thing when they hear it: Fiberglass is fluffy pink insulation that lines the attic of your house, right? That’s only half the story, in reality. While Owens Corning Inc. held a trademark on the well-known insulating product known as Fiberglass, fiberglassing itself has a well-known core structure and several uses.

Fiberglass is a laminate made primarily of glass-like material. Glass is heated until molten and forced through tiny channels to produce fiberglass before being drawn through tiny holes. Microfiber is derived from the small glass filaments, which are produced by this method because they are so thin—in fact, they’re measured in microns—as a result of which they’re known as microfiber.

The fibers can be woven together to form larger cloth pieces, or they may be kept in a more disorganized state for the familiar puffy texture, which is used as soundproofing and insulation. The sort of glass fiber utilized is determined by the amount and quality of the extruded fibers. It’s necessary for certain applications that glass fibers be free of foreign materials; however, this necessitates additional processing.

Fiberglass Glue Solutions

Cyberbond is the world’s most popular fiberglass adhesive supplier for both industrial and commercial customers. We provide a variety of fiberglass adhesives, including high strength, medium/low viscosity, fast set times, and many colors. Choose the right kind of fiberglass glue for your needs. Cyberbond is proud to be ISO 9001:2008, ISO/TS 16949:2009, and ISO 13485:2003 certified. For more information on the fibers we offer or any other inquiries you may have, contact us now.

How do you stick Fiberglass together?

Methyl methacrylate (often known as MMA) is a strong structural adhesive for fiberglass. This kind of structural adhesive is frequently utilized in the fiberglass industry to connect glass without requiring much prep.

How to bond fiberglass, aka GRP or glass reinforced plastic

This is a composite material with exceptional structural strength, making it popular for demanding or stressed applications.

Fiberglass is a lightweight material, and there’s a high demand for adhesives to secure it because it can’t be welded and mechanical fasteners not only contribute to component weight, rattling, and vibration loosening, but they may also harm the material’s structural integrity if it must be drilled.

Fiberglass Uses

  • Bath tubs
  • Hot tubes
  • Marine
  • Construction
  • Tools

After scrubbing, put the piece back in a container of alcohol for 24 hours overnight. Use Permabond Cleaner A or isopropanol (not methanol or white spirits) to clean it.

Use one of the following techniques to lightly abrade them:

  • A wet-and-dry sandpaper (carborundum paper) of 320 grade is suggested.
  • Red Scotch Brite pad

To remove any contaminants or loose particles, degrease the grill once again.

It is acceptable to bond as received, but if you want a consistent bonding surface and improved mechanical keying of the adhesive, it’s recommended that you perform this surface preparation.

What is the best adhesive to bond fiberglass?

Adhesives come in a variety of forms and have varying levels of promise. The best adhesive for each carbon fiber application will be determined by understanding the cure process as well as what the bond will need to survive.


  • Superglue, epoxy, crazy glue, ca glue are examples of bonding adhesives. Consider using a black, hardened grade such as 735 low viscosity or 737 medium viscosity for carbon fiber reinforced polymer bonds. Permabond 731 is an excellent choice for clear bonds.

Two component epoxies

  • Permabond two-part epoxies cure at room temperature and have exceptional bond to fiberglass.

Structural acrylics

  • TA4246 is a high-end MMA grade with excellent carbon fiber bonding capabilities.

Polyurethane adhesives

  • All Permabond polyurethane adhesives are strong, have high peel strengths, and offer excellent impact resistance.

With so many carbon fiber bonding solutions to choose from, the desired cure method, environmental protection, and required temperature tolerance are all crucial factors in selecting the appropriate adhesive.

How to Glue to Fiberglass Step-by-Step Guide

Gluing Fiberglass
There are a plethora of adhesives that will join fiberglass, but when cost, effectiveness, and efficiency are considered, “Plastic Fusion” by the Super Glue Corporation is a smart choice. It’s an acrylic-based epoxy composed of resin and hardener that’s especially good at bonding fiberglass to other plastic-like materials.

Things You Will Need

  • Rubber gloves
  • Aluminum foil
  • 2 pieces of fiberglass
  • 2 clean clothes
  • Super Glue Plastic Fusion

If the epoxy does get on your skin, wash it with an industrial hand cleanser like Zep Reach. If at all feasible, using a spatula or spoon, carefully peel the bonded region off of your skin until it is gone. Epoxy that has gotten into your eyes should be rinsed under running water and, if necessary, seen by a doctor.

Step 1

Find a clean and well-ventilated place to work, because breathing the epoxy is not safe. The area should be at least 68 degrees Fahrenheit when the epoxy is ready, and it should be kept away from any open flames (epoxy is combustible).

Step 2

To prevent coming into contact with the epoxy, put on rubber gloves and apron.

Step 3

Lay a large piece of aluminum foil on the work surface to prevent the epoxy from adhering (at least larger than your piece of fiberglass) while working.

Step 4

Make sure the fiberglass is resting on some aluminum foil.

Step 5

Wipe the surface of the fiberglass you wish to glue with a clean cloth, making sure no dirt or grime is on the fiberglass. Rub a dry towel over the fiberglass until any moisture on it evaporates. Allow for a few minutes for the fiberglass to dry naturally. Repeat this step with the second piece of fiberglass.

Step 6

Remove the epoxy with a Super Glue syringe and mix the solution for around one minute.

Step 7

Apply the required quantity of epoxy to the first fiberglass piece. The ratio is one dab of epoxy for each square inch of fiberglass you want to cover. If you’re closer to the edge of the fiberglass and need more epoxy, be sure it’s about an inch from the edge so it doesn’t squirt out when you press the other fiberglass piece onto it. Repeat these steps for the second fiberglass piece.

Step 8

Push the two fiberglass pieces firmly together. Depending on how you want the fiberglass sheets to be positioned, you may or may not need to hold them in position until the epoxy has cured (five to 10 minutes). If one piece is directly adhered to another, you may not need to hold them in place.

Step 9

Allow 24 hours for the epoxy to fully cure before removing the mold.

Benefits of Using Glue for Fiberglass

Fiberglass has experienced a tremendous boost in popularity in recent years thanks to its light weight and high strength characteristics. With composite materials being used across the board, from manufacturing to food preparation, glues for fiberglass materials are becoming more common to connect the material with anything and everything.

In our everyday lives, composite materials are used in a variety of ways. So, what do you do if one breaks or suffers damage? Isn’t it true that you glue it back together? However, because fiberglass glues have additional applications than just repairing and restoring, don’t overlook them. Examine the facts for yourself.

Creates a Long-Lasting Bond

By simply joining two items together, you can extend the life of your favorite product by weeks. The glues for fiberglass form strong and long-lasting connections with just about anything they’re used on.

Weather and Heat Resistant

Even in extreme weather conditions, the adhesives are found to retain the bond strength. You can repair your door frames, windows, automotive parts, and boats with ease, only by applying the glue.

Great for Load-Bearing Structures

Even in the most extreme weather conditions, the adhesives are found to have excellent bond strength. You may simply repair your door frames, windows, automobile components, and boats with glue.

Perfect for All Kinds of DIY Projects

Take charge of any DIY project that involves plastic or fiberglass materials. With several sorts of adhesives for a variety of uses, you’ll have plenty to do with your hands. And don’t worry, it practically never breaks.

Best Glue for Fiberglass

Below are five of the premium quality adhesives for fiberglass and plastic. The product is abundantly available, yet hard to find one that is suitable for your target material. So, check them out!


J-B Weld 50139 Plastic Bonder

The J-B Weld Plastic Bonder is a great sealant for binding plastic and fiberglass. It's compatible with metal, ceramic, and concrete in addition to the two substances. The Product includes a two-part solution in a dual plunger for simple mixing of the ingredients. The blended adhesive is both a bonding substance and a gap filler. The J-B bonder can create a secure, 3770 PSI glue for any type of DIY project or repairs to cracked plastic or fiberglass items. Yes, that's a lot of strength! And it works very quickly. All you need is 15 minutes to let the glue dry, and your shattered showpiece or vase will be as good as new. Some people may find mixing the bonding agent to be inconvenient. It comes with a stir stick and a mixing dish, after all. And the double syringe ensures that you don't screw up the proportion. Simply pour it onto the tray, mix it thoroughly, and apply carefully with the stirrer. However, you must be careful not to misuse it. The strong connection may be difficult to remove, and it's also long-lasting. It's also ideal for frequent usage because of the resealable cap, which prevents leaking and drying out the solution. The heavy-duty sealant is effective on PVC, thermoplastics, tile and ceramic, coated metals, and aluminum in addition to plastic and fiberglass.

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Henkel 908570 2.7 oz Tub Clear Silicone Waterproof Sealant

Henkel 908570 2.7 oz Tub Clear Silicone Waterproof Sealant
Adhesives aren't only used on fiberglass and plastic. These are unique adhesives available on the market. We'll begin with a versatile adhesive from one of the most reliable manufacturers, Loctite, that's been in business for over fifty years and offers high-quality products. The gel-like glue found in the Loctite Clear Silicone multi-purpose sealant is waterproof and weather-resistant. It may be used on nearly any material or substrate. It can be used to bind plastic, glass, porcelain, stainless steel, aluminum, rubber, fiberglass, and tile. Unlike other glue on the market, this one is weather and temperature resistant as well as waterproof, and it works equally well in both indoor and outdoor applications. It may be used to fix a variety of items, including windows and door frames, toys, gaskets, and so on. It can also repair the leaks in your favorite leather boots! Also, the sealant works faster than other silicone adhesives, requires only 5-10 minutes to dry and 24 hours of curing to achieve the highest degree of bonding. It's also waterproof, so you may use it to seal fractures in both freshwater and saltwater aquariums. The material flexes with time, making it impact resistant, after you've applied it on. So, isn't it correct to describe it as a one-size-fits-all binding material? Even the best products, though, have limits. The glue won't stick to harder surfaces such as concrete, galvanized metal, marble, or limestone. However, the 2.7 oz tube may be a useful addition to your home repair equipment.

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CAT PALM B-7000 Adhesive

CAT PALM B-7000 Adhesive
Our newest product is the CAT PALM B-700, a powerful adhesive that binds nearly everything and anything. Yes, it includes both plastic and fiberglass as well. For the breadth of options it provides, it's the favorite product of every craft enthusiast. The glue is distributed in a tube with a fine needle for maximum accuracy when necessary. So, you may repair jewelry, mobile gadgets, other electrical equipment, toys, textiles and leather bags with the greatest of delicacy. It dries in 6 minutes after application and creates strong and durable connections. And it's effective on a wide range of materials, including paper, rubber, glass, fiberglass , wood metal , plastic fiberglass nylon r The formula is transparent, semi-fluid, and insoluble in water, ensuring that the connection does not weaken underwater or under dampness. It's also nonabrasive to your skin and hands, unlike other super glues. The CAT Palm can stretch up to 900% of its length while still maintaining excellent impact resistance. Its high elasticity allows it to resist a lot of strain. The structures' durability and capacity are improved by this expansion of the material when under load. The product is available in two 25 milligram tubes or one 110 milligram tube.

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What Kind Of Glue To Use On Fiberglass

What is the best adhesive for fiberglass to bond? Cyanoacrylate (also known as fast adhesives, super glue, crazy glue, and ca glue) is a two-component epoxy that hardens at room temperature. Permabond two-part epoxies have good adhesion to fiberglass and cure at room temperature.

Does Gorilla Glue work on fiberglass?

It’s not intended for fiberglass, so we wouldn’t consider it. Internally applying to JB Weld will be difficult at best.

How do you stick Fiberglass together?

Methyl methacrylate (commonly referred to as MMA) is one of the best structural adhesives for fiberglass. This sort of structural adhesive is commonly utilized in the fiberglass sector (marine, general industrial, etc.) to join fiberglass panels together for structural integrity with little preparation.

Can you use construction adhesive on fiberglass?

Similarly, will the mastic adhere to fiberglass? Epoxy is one of two most common glues used in wood-to-fiberglass resins. It has the ability to bond any materials together and is widely utilized for fiberglass adhesives that glue fiberglass to wood. Epoxy has the benefit of spreading across both surfaces and closing up gaps between the glass and wood that are visible.

How do you stick plywood to fiberglass?

They may be attached to the hull using anything from marine bondo to epoxy mixtures or some of today’s more contemporary plastic glues in caulking tubes, such as polyurethane. Some of these marine bonding agents are quite powerful, and they might be all you need.

Will cement stick to fiberglass?

No, cement will not adhere to fiberglass.

What is the best adhesive to bond wood to fiberglass?

Epoxy is a very versatile glue. It can be used to bond almost any materials together, and it’s the preferred adhesive for gluing fiberglass to wood. Epoxy has the benefit of spreading across both surfaces and filling in gaps that can be seen between the fiberglass and wood.

Can you use Gorilla Epoxy on fiberglass?

Is Gorilla Glue suitable for fiberglass? Because urethane glue will ‘work,’ it will provide you with a wing. However, because urethane foam is not a good matrix for fiberglass fabric, it won’t give you the high strength of a composite material.

Can I use wood glue on fiberglass?

Is it possible to glue wood to fiberglass? The wood on which it is attached has a greater tensile strength. While the adhesive cures, you may want to use a few tack nails to keep the new trim piece in place and apply clamping pressure.

Does PL premium stick to fiberglass?

The VELCRO Brand 200 LB Super Max VELCO Premium Polyurethane Construction Adhesive was created to adhere to AFG-01 and ASTM D 3498 sub-floor installation standards. The most common types are compressed strands of polystyrene (PS), wood chips, metal shavings, fiberglass shards, brick dust, masonry shards, ceramic tile fragments and marble flakes. It may also be used on a wide range of building materials including concrete blocks and brick weaves.

Can I use super glue on fiberglass?

What is the most effective way to adhere fiberglass? Several adhesives are suitable. Super glue, cyanoacrylate, often known as instant adhesives, super glue, crazy glue, ca glue, or other similar names – is a strong adhesive. Using a black, hardened grade like 735 low viscosity or 737 medium viscosity for bonding carbon fiber reinforced polymers

Will Loctite work on fiberglass?

Reach for Loctite Epoxy Marine to keep your boat afloat if it has sprung a leak. This marine epoxy resin can be used on PVC, many metals, ceramic, fiberglass, concrete, glass, wood, and certain plastics.

How do you glue fiberglass to concrete?

To cover the entire backside of the fiberglass, spread the adhesive equally over it with a notched trowel. To connect the concrete and fiberglass, apply pressure across the whole sheet and press the fiberglass in place.

Will fiberglass stick to tile?

Fiberglass is a difficult material to work with. The problem is that it has a nonporous surface that is so smooth that standard adhesives have difficulties sticking. To successfully attach tile to fiberglass, you’ll need an adhesive able to adhere to a smooth surface.

Can you glue aluminum to fiberglass?

Epoxy and fiberglass are like peanut butter and jelly: they’re a match made in heaven. Epoxy can also be used to repair aluminum to fiberglass, as well as other materials. Mix the glass fibers into the epoxy before gluing the aluminum to it so that it fills any holes and gaps (important!). You’ll wind up with a better glue connection than you would with any other method, plus the epoxy will keep the aluminum attached.

Is polyester resin compatible with glue?

Epoxy resin is not suitable for use as a thin film because it cures poorly. Polyester resin hardens considerably when it dries. The higher the adhesion of two materials, the more strongly they must be bonded. Epoxy resin will not stick to polyester resin.

Can you bond fiberglass to a PVC board?

Fiberglass will adhere to almost any surface provided that the surface is prepared and scuffed properly. Fiberglass repairs on PVC work well, and if done correctly, should last as long as the PVC does. Saturated dry fiberglass mat is used in layers to fabricate fiberglass.

Final Words

Glue isn’t hard to come by, is it? You can get a variety of adhesives in a variety of forms, containers, and concentrations at your local store. But the big question is: will it work on polyester and fiberglass?

We’ve done our best to answer all of the questions that you may have about purchasing a glue for both materials. As a result, you won’t have any trouble finding the greatest glue for fiberglass and plastic from now on.


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