Does Gorilla Glue Work On Fiberglass? (Read This First!)

If you work with welding or fiberglass, then you must have heard about Gorilla glue. So, how effective is gorilla glue for fiberglass? In this article, we will talk about everything that you need to know about this.

What is Gorilla Glue and how does it work?

It is a polyurethane glue brand made in the United States. Their Original Gorilla Glue, which was initially launched in 1994, is well-known. 100% waterproof and resistant to severe temperatures and is known for its extraordinary strength and adaptability.

Gorilla Glue’s water-activated polyurethane compound extends through materials to make an extraordinarily strong bind to nearly anything, making it the perfect option for almost any job or repair.

What is Fiberglass made of?

Fiberglass or glass fiber is a reinforced plastic material formed of a woven material infused with glass fibers that are randomly arranged across each other and kept together by a binding component. Fiberglass is mixed with resin to create a composite that is highly robust and long-lasting.

Glass is heated until molten, then squeezed through superfine holes to make fiberglass. This results in incredibly thin glass filaments. They can be woven into more extensive cloth patches or left unstructured for the more recognizable puffy texture used for insulation or soundproofing.

Does Gorilla Glue work on fiberglass?

Original Gorilla Glue may be used on fiberglass; however, it must be cured for at least a week before being submerged in water. However, we recommend employing a waterproof epoxy because of its gap-filling capabilities.

Gorilla Glue and epoxy are both more potent than the fiberglass they bind, making them both good alternatives. On the other hand, epoxy adheres to a broader range of materials. As a result, combining waterproof epoxy with Gorilla Glue will increase shear strength. As a result, the two of them will operate better together on fiberglass.

Which type of glue is good for fiberglass?

There are many different varieties of glue. Even though all of them are really strong, we cannot use all of them for fiberglass. So, which glue is best?

GorillaWeld is a waterproof and adaptable adhesive that bonds metal, plastics,  concrete, ceramics, PVC, fiberglass, and other materials for a long-lasting, permanent bond.

GorillaWeld is a two-part glue that is extremely strong and durable. The steel bond epoxy compound has a binding strength of 4250 PSI and sets in approximately 10 minutes.

This is a pretty simple thing to use. Furthermore, the adhesive dries in a dark grey/brown hue. This glue sticks to whatever you want to test if thoroughly mixed and applied immediately. The epoxy hardens in twenty-four hours and may be handled like other plastics.

How should Gorilla Glue be applied to fiberglass for optimal adhesion?

Below, we will discuss all the quick tips and procedures you need to follow while applying gorilla glue on fiberglass.

1. Use the right Gorilla Glue: GorillaWeld

As we mentioned earlier, use GorillaWeld and not the regular glue. Working with fiberglass is not easy, and you will need to use heavy-duty epoxy.

2. Prepare the surface thoroughly

Make sure to clean the surface with a cloth and remove all dust and debris. Also, dry the surface properly. Sometimes GorillaWeld might have a tough time sticking to a smooth surface; slightly rub the surface to make it a bit rougher.

3. Take only as much adhesive as you need.

Using the cap to puncture the seal in both the tubes, pour the contents from the tubes in a mixing tray, and mix it thoroughly for 20 seconds using a wooden stick. You can reuse the epoxy. Hence only take as much as you will need.

4. Work quickly

Make sure to apply the mixture within three minutes to the surface or the fiberglass.

5. Dry it properly

Leave the surface for 24 hours entirely without touching or disturbing the product in any way. Proper drying time will ensure that the fiberglass is perfectly stuck without any problem.

6. Storing the tube properly

Always seal the tube caps properly to keep it airtight and keep the tubes in a cool and dry place.


Gorilla Glass for fiberglass can be a good choice if you use the product correctly. It has been in the market for quite a long now, and it has a good fame for sticking products. So, you can use this in fiberglass without worrying too much.