Is Foam Flammable? 

This article will answer the question, is foam flammable? It also covers several topics about what foam is, the types of foam, the use of foam, why foam burns so quickly, and how to prevent foam from burning.

Is Foam Flammable?

Some types of foam are flammable, and some others are not. Styrofoam is a flammable foam that can catch fire when exposed to high heat. It will melt at 212 degrees Fahrenheit, ignite with a spark at 680 degrees Fahrenheit, and then auto-ignite at 800 degrees Fahrenheit. 

Silicone foam, on the other hand, is flame retardant, self-extinguishing, and can endure a flame of 2100 degrees Fahrenheit for more than 10 minutes without igniting.

What are the Types of Foam?

There are various varieties of foam on the market, and deciding which one to use for a specific application can be challenging.

Latex Foam

Latex is a naturally occurring substance. A milky white fluid collected from some types of trees is used to make latex foam. It is the ‘greenest’ foam, with a lower carbon footprint than those other foam types. Typical forms of latex foam are Dunlop and Talalay. 

Closed Cell Foam

Closed Cell Foam is non-biodegradable, petroleum resistant, floats, has high tensile strength, and is non-absorbent to water. 

Exercise mats, high-impact aerobic equipment, and mechanic’s box lining utilize Closed Cell Foam. It works well as a thermal insulator or a hot tub cover.

Charcoal Foam

Charcoal foam is lightweight open-cell foam with a low density and stiffness. It has superior ventilation and is long-lasting, stain-resistant, impact-resistant, and damage-resistant, making it ideal for packaging applications. 

It’s used for soundproofing and repels most dirt, making it simple to keep clean. It is inexpensive and straightforward to cut.

Lux Foam

Lux Foam, sometimes known as Elon foam, is a high-density, long-lasting foam. Only medium-firm hardness is available. Lux Foam is a high-quality foam commonly used in high-end furniture seats and mattresses.

Rebond Foam

Rebond foam is created from recycled shredded scrap foam that has been bonded with a liquid polyurethane before being crushed into a block. It’s a dense, open-cell foam that provides a sturdy, stable foundation and keeps its shape effectively without losing durability.

Dry Fast Foam

Unlike polyurethane foam, dry fast foam is an open-cell foam with open pores that allow water and air to move through freely. As a result, outdoor cushions don’t absorb moisture and inside bedding is noticeably more relaxed. 

Cover the foam with an outdoor cloth or mesh for a virtually maintenance-free foam in the heat, rain, and snow. Mold and mildew will not grow because the formula contains an antibacterial ingredient.

High-Density Foam

It is a substantial foam. The high-density foam may support the spring systems in other types of mattresses, such as innerspring or hybrid.

Because high-density foams are too rigid to be used throughout the mattress, they are rarely utilized. As a result, they’re typically used as a bed’s base or to offer edge support.

High-resilience foam

High-resilience foam is a high-quality foam found in a wide range of high-end furnishings, including yachting and boating. It’s also a great mattress material because it’s incredibly buoyant and resilient.

Memory Foam

Memory foam is a type of polyurethane foam known as “viscoelastic” or “low-resistance” polyurethane foam (LRPu). It’s made by mixing several compounds and additives with polyurethane, which varies depending on the foam type.

Polyurethane Foam

Polyurethane Foam is the foundation for all subsequent foam kinds that have been brought to the market. Open-cell polyurethane foams include Charcoal, Dry Fast, High Density, Resilience, Lux, Memory, and Rebond. 

The density of these foams is what sets them apart. It is given one of these names when foam falls within a specific density range.

Silicone Foam

Silicone foam is a type of synthetic rubber that is used for gaskets, sheets, and firestops. It’s available as a solid, cured product or as individual liquid components for field use.

What are the Use of Foam?

  • Filtering liquids
  • Exercise mats
  • High-impact aerobic equipment
  • Lining in mechanics’ box
  • Padding
  • Seats
  • Packing
  • Soundproofing
  • Acoustical dampening
  • Pillows
  • Furniture

Why Does Foam Burn So Easily?

Because of the cell structure of open-cell polyurethane foams, they have a comparatively short ignition period. You can learn more about the burning behavior of foam here

How to Prevent Foam from Burning?

Here are some steps to prevent a potential ignition fire from spreading to the foam:

  • Keep foam away from sources of fire.
  • When storing foam, avoid scorching temperatures.
  • Because foam is a flammable material, it should be clearly labeled when it is being stored.


Foam is prone to catching fire due to its delicate cell structure. Not all varieties of foam, however, are explosive. Foam fires can be avoided by adequately storing foam and keeping it away from ignition sources.

Frequently Asked Question (FAQs): Is Foam Flammable?

When Heated, is Styrofoam toxic?

The material remains stable with routine use. At high temperatures, however, it begins to melt or degrade. A microwave oven can allow the harmful chemical styrene to leach into your food, even if there is no apparent damage to the foam.

How Can You Make Styrofoam Fireproof?

The short answer is that by applying a coating. When exposed to flame, this creates a rock-hard shell with 0% flame spread and an intense heat transfer barrier that prevents the foam from melting on the other side of the coating for a long time.


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