![]() However, only low expansion foam comes in a spray can format. These products may also come with a long, narrow dispenser that connects to the nozzle, allowing the foam to be injected into very small gaps with precise accuracy. The can comes premixed so there is no wait time before the expanding foam can be applied. However, sealing up cracks around window and door frames with low expansion foam is also important to ensure that the home is properly insulated.Įxpanding foam products will typically come prepared for use in a spray can or in separate components that need to be applied with a handheld gun. Thermal insulating is often done with high expansion foam because it can be used to quickly insulate an entire room.High expansion foam can be used to insulate a wall, floor, or ceiling, while low expansion foam is used for sealing cracks and gaps where ductwork, plumbing, and electrical run through the home so sound cannot pass through these holes. ![]() Acoustic insulating helps prevent the transfer of noise between rooms, floors, and exterior walls.The foam can seal holes between floors where wires and pipes run and can be used to seal gaps around wall outlet boxes to prevent loosening, while at the same time serving as a fire barrier should disaster strike. Fireproofing the home is very important, and some expanding foam products, designed to be highly fire resistant, can be used for this purpose.Some expanding foam products can even be used to help create ponds, fountains, and other water features for the yard. Sealing cracks and gaps in the foundation, walls, and around windows and doors helps prevent water from leaking into the home. Waterproofing with expanding foam is a common usage around the home.Most of the many uses for expanding foam fall into four categories, including waterproofing, fireproofing, acoustic insulating, and thermal insulating. High expansion foam would quickly seep out, creating a dripping mess, while the low expansion foam is much easier to manage. This smaller size makes low expansion foam a great choice for home repairs because the gaps, cracks, and utility holes are generally much smaller. Low expansion foam, in contrast, can only expand up to 20 to 30 times its liquid size.It can include open-cell foam, which can allow moisture to flow through the foam, and closed-cell foam, which completely blocks moisture and airflow. This type of expanding foam can expand up to 200 to 300 times its liquid size. It is also regularly used for filling holes in the foundation and mortar where water, gas, and electrical lines have been run. High expansion foam is typically used in commercial and industrial settings for quickly filling large gaps and cracks in doorways and windows.Low ExpansionĮxpanding foam products fall into two broad categories based on the amount that they can expand beyond the liquid size. When shopping for an expanding foam for sealing cracks and gaps around windows, insulating moving boxes, or securing wires or plumbing, factor in the expansion size, the functionality of the specific product, and whether it’s applied with a spray can or a handheld gun. Photo: What to Consider When Choosing the Best Expanding Foam BEST FIRE-RESISTANT: Great Stuff Smart Dispenser Fireblock.BEST PEST-BLOCKING: Tomcat Rodent Block Expanding Foam Barrier.BEST WATERPROOF: Red Devil Foam & Fill Large Gaps & Cracks.BEST BANG FOR THE BUCK: Great Stuff 282047 Big Gap Filler, 12 oz. ![]() ![]() BEST OVERALL: Great Stuff Smart Dispenser Gaps & Cracks.We researched top-rated expanding foam in a variety of categories, focusing on customer satisfaction, product efficacy, and value. ![]() We examined top-selling products on the market, comparing the features-and, equally important, customer reviews-to come up with our list of favorites. The list of products below is a great place to start the search for the best expanding foam for your home. The list of top products below is a great place to start the search for the best expanding foam for your home. However, for more specific uses, like building a pond in the backyard or preventing rodents from entering your home, the expanding foam should be made and tested with waterproofing or rodent blocking in mind. The versatility of expanding foam makes it simple to choose a general-purpose product for a variety of applications. It can also be used for blocking sounds, securing water pipes so they don’t rattle in the wooden frame, sealing cracks and gaps around windows and doors, and more. Expanding foam is a flexible product with a wide range of applications including waterproofing, fireproofing, and insulating to reduce the flow of heat into and out of the house. ![]()
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