Is Glue Flammable?

Glue is increasingly getting popular among commercial and home-based enterprises. This is because there are millions of applications that require the use of adhesives. One of the essential safety precautions when handling glues concerns their flammability. But is glue flammable?

That’s the question that we aim to answer with this elaborate article. While the general rule is to keep any adhesives away from fire, there still exists a big debate as to the flammability of various adhesives.

Ideally, this is a debate that doesn’t have a definite answer. However, it is vital to note that most ordinary glues, industrial-grade adhesives, and rubber cement are flammable. For that reason, they are mostly not accepted in checked or carry-on baggage.

But since the question doesn’t come with a single answer, we will dive into details.

is glue flammable

Is Dried Glue Flammable?

Interestingly, nearly all household adhesives are flammable when wet. That’s due to the kind of solvents that they use. However, once the glue dries up, it ceases to be flammable. Thus, irrespective of whether the bonding agent had a flammable or nonflammable solvent, it loses it once it dries up.

The process is commonly referred to as cured adhesive flammability? However, as you will find in the next sections, there are exceptions.

Flammable Vs. Nonflammable Canister Adhesives

Interestingly, there is a big difference between flammable and nonflammable canister glues, and you can easily find either type in the market. So, as you’d expect, each type comes with its merits and demerits.


The main component of flammable glue is that they contain flammable solvents. These flammable solvents can be too disastrous and hazardous if used plainly. However, manufacturers always try to minimize the hazardous effects by blending them with other materials to reduce flammability.

These options have a relatively long flash off time of up to 5 minutes. Thus, they may not be so ideal for manufacturing environments where speed or time is of the essence.

But what is flash off time? By definition, the flash-off time of an adhesive is the amount of time that the solvent takes to evaporate during the bonding process.

Finally, they feature a longer open time of up to 24 hours, which provides unbeatable working flexibility and a reduced risk of adhesive failure.

In summary, flammable canister adhesives have the following features;

  • Comparatively slower flash-off time of up to 5 minutes
  • They are not as toxic as nonflammable options making them ideal for use in environments without breathing apparatus.
  • They feature a longer open time.
  • You need to take care of the flammability hazard that they pose.


Unlike their flammable counterparts, nonflammable canister adhesives contain nonflammable solvents such as methyl chloride. Such solvents are considerably heavier than conventional solvents.

Methyl chloride and other solvents that fall in this category are pretty toxic, and you will need to use such glues in open spaces. You may also need to provide breathing protection using a respirator with a self-contained air supply.

Again, nonflammable canister adhesives differ from their flammable options when it comes to flash off time. They feature shorter class off times than their counterparts, making them ideal for high-level production end environments where a long wait time will remarkably impact the overall production. So, with a fast flash-off time of just two minutes, these types of glues are ideal for commercial enterprises that value speed for production.

While these types of glues come with several benefits, they also come with a variety of limitations. For example, they are more hazardous and may not be ideal for on-site use. They also have a short open time of about one minute, which may make them useless after a short period.

In summary, nonflammable adhesives are;

  • Heavier than their flammable counterparts.
  • More toxic.
  • Have a shorter open time.
  • They have faster flash-off time hence ideal for production environments where speed is of the essence.

Frequently Asked Questions

Is Gorilla Super Glue Flammable?

Yes. It is important to note that Gorilla super glue is flammable, and the combustion process produces dangerous chemical conditions. It is also essential to note that you need to take good care of Gorilla glue because it can dry after a single-use. It absorbs moisture when left open and will quickly absorb air.

Is Gorilla Glue Resistant to Heat?

Well, one of the reasons why gorilla glue has remained popular among most DIY and professional glue users is its ability to withstand both heat and water. You can use it in products that are usable in water or those that you will need to use in extra heated environments. However, it is still essential to keep glued parts away from extremely high temperatures as this will most likely compromise the bonds.

Can Super Glue Catch Fire?

Interestingly, super glue can catch fire and burn irrespective of whether it is cured or not. It ignites very easily with the emission of noxious fumes that are relatively harmful. Super glue can also ignite cotton, paper, or other materials when in liquid form even without application of any external heat.

What Is the Most Recommended Glue for Outdoor Use?

You can use both flammable and nonflammable adhesives for outdoor use. However, epoxies are most preferable because they exhibit a variety of setting speeds. They are ideal for use in both porous and nonporous materials. Finally, they come in a variety of formulations.

Are There Adhesives That Melt When Heated?

Firstly, it is vital to note that there are two classifications of adhesives. Each of them comes with their respective properties. Thermoset types set fast and become hard to form plastic-like materials. When you burn them, they burn like plastic.

Thermomelt models also dry hard. However, they melt like on burning. They are also called hot-melt glue and will easily melt at an average of about 80°C.

Final Words

You need to handle adhesives with care. And that will include closing them when you are not using them and keeping them away from fire sources. This is because most superglues, rubber cement, and pipe cement are flammable.

However, you will also find a variety of super glues and some household glues that are nonflammable. The general rule when dealing with glues is to always read the instructions from the manufacturer to find out the flammability of the kind of glue that you are using.

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