Top 10 Best expandable foam in 2026

Last Updated - 6/29/2026

🏆Best Choice

Loctite

Loctite Tite Foam Big Gaps Spray Foam Sealant, 12 fl oz Can, 1 Pack - Polyurethane Expanding Insulation

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Expands To Fill: Loctite Tite Foam Big Gaps fills, seals, and insulates effectively around gaps and cracks up to 3 inches in size
•High Density Foam: Offers high density with a uniform cell structure for durability and overall insulation for your remodeling needs
•Superior Flexibility: Withstands building and material movement without compromising its seal
•Strong Adhesion: Sealant bonds to most building materials like wood, concrete, brick, stone, metal, pvc, and more
•UV Resistance: Withstands harsh UV rays for long lasting results

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$7.98

$9.99

-20%

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Loctite

Loctite Tite Foam Gaps & Cracks Spray Foam Sealant, 12 fl oz Can, 1 Pack - Polyurethane Expanding Insulation

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Expands To Fill: Loctite Tite Foam Gaps & Cracks fills, seals, and insulates effectively around gaps and cracks up to 1 inch in size
•Premium Durability: Polymer foam based on purified and concentrated ingredients withstands harsh UV rays for long-lasting results
•High Density Foam: Offers high density with a uniform cell structure for durability and overall insulation for your remodeling needs
•Superior Flexibility: Withstands building and material movement without compromising its seal
•Strong Adhesion: Sealant bonds to most building materials like wood, concrete, brick, stone, metal, pvc, and more

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$6.98

$8.99

-22%

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Great Stuff

Great Stuff 99112876 Smart Dispenser Multipurpose Black, 12 Oz.

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Multipurpose black foam for interior/exterior use
•Comes with NEW SMART DISPENSER Straw
•Reusable for up to 30 days - use again and again
•Precise, greater control, no drips and less mess
•Fills, seals and insulates gaps up to 3/4"
•Allows cured foam to hide well and not be noticeable in shadows
•Adheres well to stone, eliminating the need for a caulk adhesive (depending on the project)

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$10.98

$12.99

-15%

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Great Stuff

Great Stuff 99112809 Smart Dispenser Pestblock, Gray

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•This ready-to-use foam sealant expands up to 1" to take the shape of gaps, creating a long-lasting, airtight seal. Block out nuisances entering your home.
•PUT FOAM WHERE THEY ROAM. Take on common areas where nuisances get in such as PVC pipe penetrations, around electrical cable lines, water faucet penetrations, attic hatch frames, rim joists, sill plates and more.ates and more.
•DISPENSE SMARTER. Securely thread the Reusable Smart Dispenser and leave attached to the can to seal projects for up to 30-days. Insulating foam stops as you stop for clean, easy, no-drip dispensing and increased precision with more control.
•SPRAY ANYWHERE. Fill gaps and keep nuisances out with exceptional adhesion to building materials on both the interior and exterior of your home. Adheres to wood, metal, masonry, glass and most plastics.
•VERSATILITY. Stop waiting around and keep the pace of your projects on target. This foam sealant dries tack-free in 20 minutes and cures rigid for trimming in 1 hour. Trim, sand, stain and paint for a truly GREAT finish to your DIY projects.
•Light Grey in color - Forms a long-lasting, airtight and water-resistant barrier
•Helps improve the home’s energy efficiency by sealing gaps and cracks
•Interior/Exterior use - Bonds to most building materials and surfaces
•Tack free in 10–15 minutes; Trims in one hour
•UL Classified

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$10.10

$12.99

-22%

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Red Devil

Red Devil 0909 Spray Foam, Fill Large Gaps & Cracks Expanding Insulation Polyurethane Foam Sealant, 12 Oz, Off White

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•FILLS LARGE HOLES, GAPS & CRACKS: Ideal for insulating and preventing drafts
•USE INSIDE OR OUTSIDE: Can be used anywhere around the home
•SANDABLE, PAINTABLE & STAINABLE: Can be sanded, painted or stained after curing
•ADHERES TO: Painted and unpainted wood, concrete, cinder block, aluminum & fiberglass
•SOLVENT CLEAN UP: Requires the use of a solvent for cleanup
•12 oz aerosol great for smaller jobs
•Seals bonds and insulates
•Fills large and small holes in ceilings floorboards concrete and cinder block walls
•Seals around ducts cables plumbing areas and central heating pipes
•This item is not for sale in Catalina Island

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$7.19

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Touch 'n Foam

DAP Touch ‘n Foam Max Fill Maximum Expanding Foam Sealant, Off White, 12 Oz (7565000043)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•3x Expansion to fill gaps great than 1 inch wide
•Weather resistant bond that seals out drafts
•Blocks insects and pests
•Water resistant and fire retardant
•Paintable and sandable foam sealant can be used indoors or outdoors

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$9.82

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Umail

8 Pcs 14”x16” Expanding Foam Packaging for PC & Irregular-Shaped Items - Shockproof Expandable Packing Foam, Protective Computer Shipping Material for Electronics & Fragile Devices

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•PERFECT PACKING SOLUTION: Umail’s expanding foam for shipping are used to use on an industrial scale for packaging odd shaped products, or oddly shaped items, meters, vases, crafts, and even a fully built PC with GPU installed, pc packing foam. They are great for shipping fragile items.
•WORK QUICKLY: When you crack “L” symbol it immediately comes in contact with the reactant in the “R” symbol. You have only a few seconds to thoroughly combine the two before the final product bursts through a membrane and fills the envelope, so it's super important that you don't start making the foam and expanding it until you have all the supplies you need right there and you're ready to go. Once you get started, you've only got a short amount of time before the foam hardens up and feels like a Styrofoam cup.
•EASY TO USE: Place foam bag on desk, crack “L”, you will hear “peng” sound, then slap “L” and “R” with both hands quickly. Pat 20-25 times within 8 seconds. Then wait for liquid expand and break through L/R area, and quickly distribute liquid evenly throughout bag. Note: Only simple spreading to all corners of the bag is required here (e.g., follow the video instructions), do not keep spreading, as it will disrupt the foaming process. Once you've done that, you should position your item and gently push it into the expanding foam. In just a few seconds, the foam will harden and form a bespoke mold around your object, providing optimal protection as it envelops even the tiniest components
•WHAT YOU WILL GET: 8 pcs individually packaged expanding foam packaging bags. We recommend used for box size of 8"x8"x8". Please note that the heat generated when slapping the pc shipping foam bag is normal and it will soon return to room temperature, just like holding a hot cup of coffee.
•WATCH TUTORIAL: If first time user, watching tutorial or instructional video at listing to get a better understanding of how foam expands and how to apply it properly. This will help ensure a good results and prevent expandable foam from expanding more than intended
•SHIPPING PC: According to experience, when using expanding foam for pc shipping, please place it in case as soon as bag starts to expand. It will automatically adapt to the shape of computer, providing protection, not wait until bag expanded significantly. Be careful to avoid sharp objects.

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$24.59

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Great Stuff

Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Elegant design and Smooth finish
•Expanding foam sealant for insulation and air sealing
•20-ounce can for easy application in various areas
•Ivory, blends well with most surfaces
•Great for both interior and exterior use

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$11.99

$17.85

-33%

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Umail

4Pcs 14x16 Inch Expanding Foam Packaging for PC Components & Valuables, Self-Forming Cushioning Material for Electronics/Unique-Form Devices, Shape-Conforming Shipping Protection

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•SHIPPING SOLUTION: Umail’s expanding foam for packaging is ideal for industrial-scale packaging of odd-shaped items, generators, vases, Laptops, printers, cameras - anything of value that you need protected. Also, perfectly for packing up a pc for a cross country move
•WORK QUICKLY: As soon as you've cracked the "L" symbol, it comes into immediate contact with the reactant in "R" symbol. You've got only a few seconds to thoroughly combine the two before the final product bursts through a membrane and fills the envelope. It is vital that you do not initiate the foam creation and inflation process until all your items are laid out and you are fully prepared.
•EASY TO USE: Place foam bag on desk, crack “L”, you will hear “peng” sound, then slap “L” and “R” with both hands quickly. Pat 20-25 times within 8 seconds. Wait for liquid expand and break through L/R area, quickly distribute liquid evenly throughout bag. Note: only simple spreading the liquid to all corners of the bag is required here (e.g., follow the video instructions). If you keep spreading during the foaming process, it will disrupt the progression, causing an unsmooth foaming reaction and insufficient expansion
•SHIPPING PC: According to experience, when using expanding foam for pc shipping, please place it in case as soon as bag starts to expand. It will automatically adapt to the shape of computer, providing protection, not wait until bag expanded significantly. Be careful to avoid touching the sharp objects on the computer, as they will tear the bag.
•WATCH TUTORIAL: Watching instructional video to get a better understanding of how the foam expands and how to apply it properly，to ensure get the results and prevent foam packaging from expanding more than intended. We recommend box size of 8"x 8"x 8"

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$14.86

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Great Stuff

Great Stuff 99108824 Smart Dispenser Gaps & Cracks, Cream, 12 Ounce

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•THE GAP AND CRACK ATTACKER! Reduce drafts and save energy
•THE GAP AND CRACK ATTACKER! Reduce drafts and save energy
•No drips, less mess - foam stops where you stop
•Reusable for up to 30 days - use again and again
•Precise, greater control

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$8.18

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