This site contains affiliate links. As an Amazon Associate, I earn a commission from qualifying purchases at no extra cost to you. Full Disclosure Here.
Cutting insulation can be hard with the wrong knife. The thick fiber is tough and difficult to slice and needs a special blade to do the job.
There are two main types of insulation knives: the straight blade and the serrated blade. The straight blade is best for cutting insulation that is already in place, while the serrated blade is better for cutting insulation that is being installed. Both types of blades are made from high-carbon steel for durability and have a special coating to prevent rusting.
Today's mechanical and HVAC insulation installation services require a knife that will not only cut standard materials but that will handle smoothing tapes and adhesive laps while maintaining optimal edge retention. A full metal tang with a rounded handle for tough cuts intended for on-site jobs might be what you need.
When choosing an insulation knife, be sure to select one that is comfortable to hold and that has a sharp blade. With the right tool, cutting insulation will be a breeze.
Hultafors Insulation Knife FGK
An insulation knife with a 2" (50 mm) wide, flexible blade and scale. Its serrated blade makes it easy to cut through all types of insulation Wool. Grip-friendly handles made from impact-resistant plastic.
- The blade is made from 50 mm wide carbon steel.
- A serrated edge makes it easy to cut through all types of insulation.
- Both the handle and holster and made from super-durable plastic.
- CM scale on the blade makes for quick measurements.
- Holster included.
Milwaukee Smooth Blade Insulation Knife
The Milwaukee Tool Smooth Blade Insulation Knife. The Product is Easy to Use and Easy to Handle. The Product is Highly Durable.
- Smooth Blade Insulation Knife
- The product is easy to use and easy to handle
- The product is highly durable
Morakniv Craftsmen Insulation Knife
Morakniv Craftsmen knives are specialty knives that have been developed in close collaboration with various professional categories in the construction trade. The common denominator for specialty knives is that they are ergonomically sound, efficient, and safe.
The Mora Craftsmen 7350 is a serrated-edged knife with a Sandvik stainless steel blade that is suitable for various types of insulation. The knife has an ample handle that fits your hand even when wearing gloves—blade length 13.8-inches (350 mm).
Morakniv has been manufacturing the highest-quality knives in Mora, Sweden since 1891. Professionals worldwide trust the quality materials and fine craftsmanship of Mora Knives.
- Professional grade trade knife with a serrated stainless steel blade
- Extra-long serrated blade for cutting insulation
- Ample-sized plastic handle to fit your hand even when wearing gloves
- Limited lifetime manufacturer’s warranty.
- Blade Thickness: 0.06" (1.5 mm), Blade Length: 13.8" (350 mm), Total Length: 19.7" (500 mm), Weight: 8.4 oz. (238g)
ALLEX Insulation Knife Wood Handle Japanese Stainless Steel 8 Inch Long Cut
- Utility Insulation Cutting Tool: Utility Insulation Cutting Tool: It is an easy-to-use Japanese insulation cutter. This versatile knife is ideal for cutting various insulator materials, styrofoam, polyurethane foam, foam, glass wool, mineral wool, Rockwool, fiberglass insulation, etc. Both home DIY users and professional users can use this versatile knife. The handle is wooden, and it fits in your hand.
- Razor Sharp Japanese Steel: The blade uses Japanese high-grade stainless steel. The excellent sharpness of the Japanese steel knife minimizes chips and provides a smooth cutting feel. Improves work efficiency even when cutting materials that are difficult to cut with a regular cutter.
- Long and Serrated Blade: The 8-inch long blade can cut even large-sized and pipe-shaped insulation materials. It has a unique wave blade edge (serrated blade) processing specialized for cutting heat-insulating materials and styrofoam.
- Safety Blade Case: It comes with a durable blade cover that is convenient for safe carrying. You can also store it safely at home or in your workplace.
- Overall Length: 13-3/4" / Blade Length: 8" / Blade thickness: 1.5 mm / Weight 5.64 oz / Made in JAPAN
ALLEX Insulation Knife with Sheath
- Utility Insulation Cutting Tool: It is an easy-to-use Japanese insulation cutter. This versatile knife is ideal for cutting various insulator materials, styrofoam, polyurethane foam, foam, glass wool, mineral wool, Rockwool, fiberglass insulation, etc. Both home DIY users and professional users can use this versatile knife. As it is a resin handle, it is very lightweight.
- Razor Sharp Japanese Steel: The blade uses Japanese high-grade stainless steel. The excellent sharpness of the Japanese steel knife minimizes chips and provides a smooth cutting feel. Improves work efficiency even when cutting materials that are difficult to cut with a regular cutter.
- Long and Serrated Blade: The 8-inch long blade can cut even large-sized insulation materials. It has a unique wave blade edge (serrated blade) processing specialized for cutting heat-insulating materials and styrofoam.
- Safety Blade Cover: It comes with a durable blade cover that is convenient for safe carrying. You can also store it safely at home or in your workplace.
- Overall Length: 13" / Blade Length: 8" / / Blade thickness: 1.5 mm / Weight 4 oz / Made in JAPAN
Minova Insulation Knife with Sheath
- Insulation Cutting Tool： Our insulation cutter is specifically designed to cut mineral wool glass wool, mineral wool, Rockwool, fiberglass insulation, and other types of insulation. This versatile knife is very lightweight.
- Long and Double-Sided Blade: 11-inch double-sided stainless steel blade and special serrated blade edge design (almost little dust). You can cut large-sized insulation material.
- Safe Blade Cover: It comes with a high-quality sheath. When not in use, you can store it safely at home or in your workplace.
- Overall Length: KD-01S280：16.5 inch; Blade Length: 11"; Blade thickness: 1.5 mm; N.W.: 242 g
Everhard X-Long Cut Insulation Knife
Everhard's Insulation knives are the favorites of commercial roofers for cutting ISO board insulation. High-quality, precision blade sharpened on 3 sides cuts through all types of roofing insulation.
- Our Longest Blade Yet – The 5″ blade cuts through today's thicker IsoBoard and other insulation.
- Consistent Edge Quality – The precision ground blade is double-beveled on all three edges.
- High Carbon Spring Steel – Hardened and tempered to provide a long-lasting edge with the ideal combination of rigidity and flexibility.
Grip-Rite Stone Wool Insulation Knife
A 420-Grade stainless steel blade with a serrated edge for superior cutting of insulation products and stay sharper longer.
The recommended knife for cutting roxul Stone Wool insulation.
Plastic handle designed for right or left-hand use. Outstanding corrosion resistance.
The blade is 7.9" Long and 1mm thick.
- 420-Grade stainless steel blade with a serrated edge for superior cutting of insulation products
- The product is manufactured in Taiwan
- The recommended knife for cutting roxul stone wool insulation
HYDE 16-Gauge Square Point Knife
The Hyde square point knife is made from high-carbon steel that has been tempered and ground to precise tolerances. It is made for tough cuts, rounded handle, and makes cutting mechanical material easy.
- Hardened high carbon chrome vanadium steel blade
- Ground and tempered to precise tolerances
- Smooth hardwood handle
- The blade is securely riveted and locked in place with a strong nickel-plated ferrule
