Top 10 Best insulation knife in 2026

Last Updated - 6/16/2026

🏆Best Choice

maudibozz

maudibozz Insulation Knife - Sod Cutter Knife: stainless steel 11.14-Inch sharp blade, double side utility Lawn Repair Saw with Nylon Sheath

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•High-quality Blade: Insulation Knife with stainless steel, sharp and durable blad,easy to cut thick branches and trunks, suitable for Foam, branches, rock wool, insulating materials
•Easy to carry: Sod Cutter Knife Equipped with nylon sleeve design, it can be easily stored after use,convenient to carry, suitable for outdoor activities
•Comfortable Grip: Handle according to ergonomic design, feel comfortable, long-term use of hands without fatigue, easier to operate
•Safe and reliable: Unity Knife equip with safety nylon sleeve, stable loop fastener and non-sliding ruber, so that you can use more assured
•Multi-purpose options: Suitable for outdoor camping, hiking, gardening and pruning and other scenarios, is your outdoor activities and home gardening right-hand

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$13.10

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Goldblatt

Goldblatt Insulation Knife, 8 Inch Stainless Steel Blade - Serrated Sharp Double Side Insulation Cutter Tool for Cutting Heat Material, Styrofoam - Rockwool Sod Cutter Lawn Repair Garden Knife

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Utility Insulation Cutting Tool: Goldblatt insulation knife is versatile and can be used for cutting a wide range of materials, such as heat insulation material, foam insulation, styrofoam and rockwool, meeting your various needs
•Double Side Garden Knife: Goldblatt insulation knife also has gardening applications, you can use it to saw trees and bamboo, mow the lawn and cut the rope. This product features a special double-sided wavy serration design, which minimizes chips and contributes to smooth cutting and efficiency. The double-sided blade has different serration densities to facilitate cutting of different materials
•Rugged Stainless Steel Blade: The total length of the product is 13-3/16 inch, the blade is 7/8 inch wide, 7-7/8 inch long, which is long enough to allow you to use the tool to cut material smoothly. Made of premium stainless steel, this product is superior in performance, rust and corrosion resistant without losing sharpness at the same time
•Safe Nylon Sheath: Equipped with a nylon sheath to protect you from accidental injury, when not using the product can be put into the sheath inside, convenient to storage, but also easy to carry
•Soft-Grip Handle: The handle is lightweight and comfortable, in line with the curve of the human hand structure, reducing hand fatigue, easy to use and labor-saving. The end of the handle is made of metal, which can be used as a hammer to set nails, making it a versatile tool for all your cutting and hammering needs

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$18.99

$22.99

-17%

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KLEIN TOOLS

Klein Tools DK06 Knife, Serrated Stainless Steel Duct Knife for Flexible Duct and Board, with Sheath

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Cuts duct board and flexible duct
•Double-edged knife blade, fine edge on one side and serrated edge on the other
•Puncture resistant nylon sheath with belt loop
•Cushion-Grip handle for comfort

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$18.97

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Pinoze

Pinoze 11" Insulation Knife, Stainless Steel Blade Insulation Cutter w/Laser Scale, Dual-Side Serrated Duct Knife Tool with Sheath for Cutting Heat Material Foam/Rockwool/Styrofoam, Garden Sod Cutter

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•[Versatile Insulation Cutting Tool] - Used for cutting a wide range of materials, such as heat insulation material, foam insulation, styrofoam, rockwool & mineral wool and fiberglass insulation ,etc, meeting your various needs
•[Rugged Stainless Steel Blade] - The insulation knife is made of premium stainless steel, which is superior in performance of rustproof and corrosion resistant. Its sharp 11" long and 7/8" wide blade allows you to handle thicker insulation materials easily and confidently
•[Double-Sided Blade Design] - The foam cutter can also be used for gardening like sawing trees and bamboo, mowing lawns and cutting ropes. Its special double-sided wavy sawtooth design has different densities of saw teeth, which minimizes debris, helps smooth cutting and improves efficiency, while facilitating cutting different materials
•[Laser INCH Scale] - The innovative laser SAE scale on the blade can help users measure the length or depth required for cutting
•[Soft Bi-Material Grip] - Comfortable TPR material with sturdy plastic material, ensuring comfort while providing strong support. The handle of the insulation cutting tool adopts a long tang design and embedded with multiple pins to maximize the stability and sturdiness of the blade
•[Safety Oxford sheath] - Equipped with an upgraded Oxford sheath to protect users from accidental injuries. When not in use, the utility knife can be placed in the sheath for convenient storage and easy to carry

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$17.99

$21.99

-18%

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Red Devil

Red Devil 4609 8 Inch Batting Knife – High-Carbon Steel Blade, Durable Hardwood Handle for Precision Insulation Cutting

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•PRECISION CUTTING: Hardened high-carbon chrome vanadium steel blade ensures clean, accurate cuts through foam and fiberglass insulation
•LONG-LASTING SHARPNESS: Superior edge retention and easy re-sharpening capability keep the blade performing at its best for extended periods
•COMFORTABLE GRIP: Natural hardwood handle provides a solid, functional grip for enhanced control and reduced hand fatigue during prolonged use
•BUILT TO LAST: Engineered with a high-alloy stainless steel blade that withstands moisture and tough conditions, ensuring long-term durability even in humid job sites
•VERSATILE PERFORMANCE: Ideal for cutting various thicknesses of fiberglass insulation with ease, making it a must-have for professionals and DIY enthusiasts

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$16.27

$17.27

-6%

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Minova

MINOVA Insulation Knife with Sheath Stainless Steel Blade 11” Double Sided Insulation Cutter for Cutting Mineral Wool Insulation Sod Cutter Garden Knife for Lawn Repair (1)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•✅【Utility Insulation Cutting Tool】MINOVA foam cutter tool is specifically designed to cut mineral wool glass wool, mineral wool, rockwool, fiberglass insulation and other types of insulation. Certainly, you can also utilize this knife for yard maintenance tasks such as trimming grass, cutting ropes, harvesting fruits, and slicing tree bark. It's an incredibly versatile sod cutter & garden knife for lawn care
•✅【Double Side Knife Design】MINOVA Foam Cutter features a special double-sided wavy serration design, which minimizes chips and contributes to smooth cutting and efficiency. The double-sided blade has different serration densities to facilitate cutting of different materials
•✅【Rugged Stainless Steel Blade】The total length of the duct knife is 16-19/64 inch, the blade is 1-1/16 inch wide, 11 inch long, which is long enough to allow you to use the tool to cut material smoothly. Made of premium stainless steel, this product is superior in performance, rust and corrosion resistant. Equipped with a nylon sheath to protect you from accidental injury, when not using the product can be put into the sheath inside, convenient to storage, but also easy to carry
•✅【Soft-grip Handle】 The handle of the rockwool insulation is lightweight and comfortable, in line with the curve of the human hand structure, reducing hand fatigue, easy to use and labor-saving
•✅【Customer First】 MINOVA is committed to providing you with the best customer support. Once any product defects are found, you can immediately contact us who will provide you a satifying solution, which can also improve our product and provide customers with a better user experience

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$19.99

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SHALL

SHALL Insulation Knife, 11" Stainless Steel Blade Insulation Cutter, Dual-sided Serrated Sharp Duct Cutting Tool with Sheath for Heat Material Foam/Rockwool/Styrofoam - Sod Cutter Garden Knife

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•[Versatile Insulation Cutting Tool]: Widely used for cutting a variety of materials, such as heat insulation material, foam insulation, styrofoam, rockwool & mineral wool and fiberglass insulation ,etc
•[11" Stainless Steel Blade]: SHALL insulation knife is made of high-quality stainless steel, which is rust-proof and corrosion-resistant while still being sharp. Its sharp 11" long and 7/8" wide blade allows you to tackle thicker insulation materials with ease and confidence
•[ual-Sided Serrated Blade]: This foam cutter is also a garden knife that can saw trees/bamboo, mow grass and cut rope. Its special dual-sided wavy serration design minimizes chips, helping to smooth cuts and improve efficiency. Different densities of serration facilitate cutting of different materials
•[Bi-Material Grip Handle]: Wrapped with soft, non-slip TPR and strong PP material, it is both comfortable and supportive. The long Tang design of the insulation cutting tool extending from the blade to the inside of the handle can maximize the stability and firmness of the blade. The zinc alloy hammer end can also be used to hammer nails
•[Safety Nylon Sheath]: Comes with a solid Oxford cloth sheath for storing the knife to protect you from accidental injuries. It can be put on your belt for easy storage and portability

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$19.99

$21.99

-9%

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Red Devil

Red Devil 4606 6 Inch Batting Knife – High-Carbon Steel Blade, Durable Hardwood Handle for Precision Insulation Cutting

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•PRECISION CUTTING: Hardened high-carbon chrome vanadium steel blade ensures clean, accurate cuts through foam and fiberglass insulation
•LONG-LASTING SHARPNESS: Superior edge retention and easy re-sharpening capability keep the blade performing at its best for extended periods
•COMFORTABLE GRIP: Natural hardwood handle provides a solid, functional grip for enhanced control and reduced hand fatigue during prolonged use
•BUILT TO LAST: Engineered with a high-alloy stainless steel blade that withstands moisture and tough conditions, ensuring long-term durability even in humid job sites
•VERSATILE PERFORMANCE: Ideal for cutting various thicknesses of fiberglass insulation with ease, making it a must-have for professionals and DIY enthusiasts

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$8.24

$9.99

-18%

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KLEIN TOOLS

Klein Tools 31733 Insulation Knife, Cuts Foam and Fiberglass with Serrated Stainless Steel Folding Blade and Lockback Mechanism

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•SERRATED PRECISION BLADE: Effortlessly cut through foam and fiberglass insulation
•3CR13 STAINLESS STEEL BLADE: Built for heavy-duty insulation tasks
•LOCKBACK MECHANISM: Secures blade open for sturdy cutting
•ENHANCED PROTECTION: Folded blade safeguards tool pouches, bags, and pockets
•HEAVY DUTY DESIGN: Cuts as easily as fixed blade insulation knives
•NON-SLIP GRIP HANDLE: Ensures comfortable handling
•VERSATILE CONVENIENCE: Integrated lanyard hole for easy tethering

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$24.99

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Hyde

Hyde Tools 60780 Square Point Knife, 8-Inch by 1-Inch/14-Gauge Wood Handle

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Hardened high carbon chrome vanadium steel blade
•Ground and tempered to precise tolerances
•Smooth hardwood handle
•Blade is securely riveted and locked in place with a strong nickel plated ferrule

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$18.20

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