Top 10 Best foam crack filler 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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$10.39

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M-D Building Products

M-D Building Products - Versatile Gray Foam Backer Rod Set 1/2in x 20ft - Essential Caulk Saver for Sealing Concrete Gaps, Expansion Joints, and Crack Filling (71480)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Quality Construction: This gap filler is made from high-quality, weather-resistant materials, ensuring long-lasting durability and performance. It effectively seals medium gaps between surfaces, preventing drafts and dust from entering your home. Suitable for both indoor and outdoor use, it withstands various weather conditions, providing consistent protection and improved comfort.
•Concrete Gap Filling Excellence: Our product excels in filling concrete gaps, creating a strong foundation for caulking projects. Utilize this foam to effectively fill joints between surfaces, ensuring dependable adhesion for caulking applications that promise enduring durability and resilience.
•Complete Gap Solution: This product provides versatile gap filling, preventing drafts and offering a sturdy base for caulking. Perfect for expansion joints in driveways and sidewalks, it can be twisted for larger gaps and easily trimmed with scissors to the desired size.
•Effortless Installation: Enjoy a hassle-free setup by effortlessly pushing the backer rod into most joint openings until it fits snugly. Once installed, enhance the seal further by applying caulk on top—no need for messy sealants or adhesives.
•Versatile Application: From repairing leaky roofs and window sills to addressing drafty doors, the Backer Rod is your go-to solution! Beyond sealing surface gaps, it excels in insulating, enhancing airtightness, and damp-proofing your home—offering multifaceted benefits for various household needs.

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$4.48

$7.44

-40%

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Red Devil

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

9.4

ChoiceComparer.com Score

9.4

/ 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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Macepason

Foam Backer Rod for Gaps Concrete Crack Filler Joints Foam Gap Filler Caulk Saver Backing Rod Filler Rope Concrete Joint Filler (1 Inch X 10 Feet)

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•【Concrete Crack Filler with Different Sizes】Our foam rope is made of high quality foam in round shape, with the features of good consistency and sturdy. For water and temperature resistant, the baker rod has ensured long-lasting performance. This flexible and soft foam gap filler will fill cracks adequately and tightly. This concrete filler foam rod is soft enough to compress, but firm enough to make a seal.
•【Low Cost and Dependable Backer Rod】 Our foam baker rod is a low cost way for you to fix gaps and joints. The concrete crack filler caulk foam can be used to fill large gaps and openings to prevent drafts and can be used when the old caulk was badly cracking. It is a very useful tools in your house, not only for gaps and joints. You can use it everywhere you like in your house and neighborhood.
•【More Choices for Your Need】You could choose the size and length of concrete joint filler according to your requirements. The backer filler rope size can be customized for various uses with scissors or blades. It is a sufficient length for daily use and replacement. And the foam gap filler is great for joints between asphalt and concrete or to fill cracks in asphalt or concrete.
•【Effortless to Install】Our foam baker rod fits well in cracks. Easy to push into areas and easy to cut. You can easily get the desired length and put it into the gap, and you can twist multiple strands of cord together for extra large gaps. First, you should clean the area and insert the backer rod firmly and uniformly into the joint or gap. And then apply suitable sealant fully over the backer rod and smooth it with a tool for a uniform finish.
•【Versatile to Use】Our foam rods help you saving a lot of filler material and works for most kinds of cracks, such as expansion joints in driveway and sidewalks, wood cracks, wall cracks, door and window joints, pavement joints, also can be used to seal windows during cold weather, post dog's ears up, make ring holders, and hand craft projects. Note: slight color difference may occur between batches, which does not affect functionality.

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$11.99

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Great Stuff

Great Stuff 157911 Insulating Foam Sealant, 20 Ounce, Ivory

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

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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DAP

DAP Wall and Cavity Foam with Wide Spray Applicator Aerosol, Off White, 20 oz. (7565000370)

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Use foam insulation sprayer to fill, air seal, and insulate stud wall cavities, rim joists, crawlspaces, attics and basements on homes and buildings
•Closed cell spray foam formula keeps moisture out of structures and is Class A Fire Rated to meet building codes; interior use on a variety of materials: including wood, masonry, metals, drywall
•Foam dries tack free in 7 to 12 minutes and fully cures in 4 hours (depending on foam thickness, temperature/humidity)
•Patent pending technology provides spray similar to a two-component product in an easy one part system; Wide spray applicator with responsive flow control trigger and a consistent wide-angle pattern
•Enhances R-Value of structures, seals out air and provides thermal insulation savings year round; saves energy and up to 30% on energy costs - meets ASTM C518 Aged R-Value of 4.1 at 1" (25mm)

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$26.53

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Great Stuff

Great Stuff 99108860 Smart Dispenser Big Gap Filler, Cream

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Fills, seals and insulates gaps up to 3 inches
•Comes with NEW SMART DISPENSER Straw
•Reusable up to 30 days
•No drips, less mess, foam stops when you stop
•Forms a long lasting, weather tight seal to reduce drafts resulting in greater comfort
•Adheres to wood, drywall, metal, masonry, glass and most plastics

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$9.99

$10.99

-9%

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SPRAYMAN

Sprayman Gaps and Cracks Filler Foam - Polyurethane Expanding Foam Sealant for Insulating Doors & Windows, Waterproof & Paintable, Straw Use - 12oz, 2 Pack

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•STRONG ADHESION: Bonds firmly to wood, concrete, metal, and most common building materials, ensuring long-lasting performance. Does not adhere to silicone, Teflon, or oil-contaminated surfaces, making it suitable for a wide range of construction and repair projects.
•HIGH-PERFORMANCE INSULATION: Acts as an expanding foam insulation, providing excellent thermal and acoustic properties. Helps reduce noise transfer and enhances energy efficiency by minimizing heat loss in buildings.
•SAFETY & QUALITY ASSURED – Sprayman Gaps and Cracks Filler Foam sealant is UL certified, meeting strict safety and performance standards for ultimate reliability.
•PAINTABLE & EASY TO FINISH: Once fully cured, it can be painted, sanded, or trimmed to blend seamlessly with surrounding surfaces. This allows for a professional finish, ensuring that filled gaps and cracks remain discreet and aesthetically pleasing.
•ECO-FRIENDLY & SAFE: Free from harsh chemicals and compliant with industry safety standards, making it a responsible choice for both homeowners and professionals. Offers safe and efficient gap-filling without the use of ozone-depleting substances.

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$14.99

$15.99

-6%

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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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