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Expandable foam is a versatile product that expands and hardens upon contact with air. It can be used for insulation, sealing holes, making casts, and even fire suppression. Different types are available for various applications, and caution is needed as it can expand exponentially.
Expandable foam is a product designed to expand and harden in contact with air. It is classically available in cans with spray nozzles, which facilitate the application of the foam in a wide variety of situations. There are numerous uses for this product, with most hardware vendors offering different types that can be used in many different applications. Most companies clearly list the suggested and recommended uses of their products on the packaging, although some consumers may think outside the box when it comes to ways to use this material.
Classically, this product is stored under high pressure. When a user activates the spray nozzle, the pressurized contents squirt out and begin to expand. As the contents expand, they develop a foamy appearance and begin to harden. This foam can grow exponentially, which means people need to be careful when using it so they don’t apply too much. Latex, polyurethane and a variety of other materials can serve as the basis for this product, and special waterproof, fire-resistant and other versions are available.
In construction, expandable foam can be used as insulation, as foam has some excellent insulating qualities. It can also be used to seal holes, with Expandable Household Sealant also useful for minor repairs. It can be used around door and window frames to create an airtight seal and can also be used to plug holes used by insects and animals. Some types can also be used as an adhesive, with several companies making foam adhesives.
People also use this material to make casts of various objects. A small amount of expandable foam can be placed in a mold and allowed to expand, creating a replica of an object. Film and television prop masters often use it for this purpose to create lightweight, inexpensive props that can be finished to look like more solid objects. The tendency to conform around a mold or object also makes this material useful for custom product packaging, with shippers making expandable foam packaging to protect delicate items in transit.
A specialized type of expandable foam is used in fire suppression, particularly with chemical fires. Foam is designed to fill a room or place quickly, preventing oxygen from reaching the fire and quickly controlling it. Some fire suppression systems are designed to emit expanding foam in the event of a fire, and firefighters can also use foam tanks and portable foam containers to quickly apply foam to a fire.
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