---
product_id: 68274584
title: "Hultafors Insulation Knife Made of Japanese Carbon Steel I 300 mm x 50 mm Blade I I Incl. Blade Guard I for Cutting a Variety of Insulating Materials Such as Styrodur, Mineral Wool etc. I 389010"
brand: "hultafors"
price: "7662 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Hultafors"
url: https://www.desertcart.is/products/68274584-hultafors-insulation-knife-made-of-japanese-carbon-steel-i-300
store_origin: IS
region: Iceland
---

# Integrated 30cm measurement scale 50mm wide Japanese carbon steel blade Impact-resistant polypropylene handle Hultafors Insulation Knife Made of Japanese Carbon Steel I 300 mm x 50 mm Blade I I Incl. Blade Guard I for Cutting a Variety of Insulating Materials Such as Styrodur, Mineral Wool etc. I 389010

**Brand:** hultafors
**Price:** 7662 kr
**Availability:** ✅ In Stock

## Summary

> 🛠️ Cut sharp, measure smart — the pro’s insulation edge!

## Quick Answers

- **What is this?** Hultafors Insulation Knife Made of Japanese Carbon Steel I 300 mm x 50 mm Blade I I Incl. Blade Guard I for Cutting a Variety of Insulating Materials Such as Styrodur, Mineral Wool etc. I 389010 by hultafors
- **How much does it cost?** 7662 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/68274584-hultafors-insulation-knife-made-of-japanese-carbon-steel-i-300)

## Best For

- hultafors enthusiasts

## Why This Product

- Trusted hultafors brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ergonomic & Durable:** Impact-resistant PP handle offers comfort and long-lasting grip during tough jobs.
- • **Precision Cutting Power:** Serrated 50mm blade ensures clean, efficient cuts with minimal shavings.
- • **Safe & Convenient Storage:** Includes blade guard doubling as a hanging hook for easy access and protection.
- • **Built-in Measurement Scale:** Quickly measure and cut up to 30cm without extra tools.
- • **Versatile Insulation Specialist:** Perfect for Styrodur, mineral wool, polystyrene, and more insulating materials.

## Overview

The Hultafors Insulation Knife features a robust 50mm Japanese carbon steel serrated blade designed for precise, low-shaving cuts across a variety of insulating materials. Its integrated 30cm scale streamlines measuring and cutting tasks, while the impact-resistant polypropylene handle ensures durability and ergonomic comfort. Complete with a protective blade guard that doubles as a hanging hook, this tool is engineered for professionals demanding efficiency, safety, and longevity in insulation work.

## Description

Durable insulation knife with 50mm wide Japanese carbon steel blade and serrated edge for clean, efficient cutting. Features a scale and impact-resistant plastic handle.

Review: Great product from Hultafors - Bough this as I plan to insulate a new garden shed. I have bought Hultafors craft and utility knives in the past and despite their very modest pricing I have found them to be some of the best utility knives I own (honestly - check the range out). Have tried this on some spare mineral wool and it cuts beautifully. What I also like about the blade is that it is marked in one cm intervals up to 30 cm. Blade comes with a neat plastic blade guard which can also be used for hanging the knife up when finished.
Review: Right tool for cutting insulation - Important not to blunt the blade by cutting with something under insulation to protect blade from the ground like a length of gutter when cutting to length, otherwise cut to width whilst roll is still wrapped. This blade is long enough to reach centre of the roll and stayed sharp after cutting 23 1200mm rolls into 400mm widths. I bought a shorter cheaper knife and a multi blade Stanley knife as backup but they weren’t needed.

## Features

- CONTENTS - Mineral wool knife FGK with serrated edge.
- DIMENSIONS AND MATERIAL - The insulation knife has an overall length of 465 mm. The blade is 316 mm long and 50 mm high and made of Japanese carbon steel. Thanks to the serrated edge of the blade, very few shavings are created. The handle of the foam knife consists of extremely durable and impact-resistant PP plastic.
- EXTREMELY SHARP - The highly resistant blade is particularly strong thanks to its width of 50 mm, allowing you to work precisely and safely. The pointed blade makes it easier to pierce materials. The scale on the blade (up to 30 cm) is used for quick and easy measurements.
- USE - The insulation knife is used for cutting rockwool, glass wool, polystyrene, insulating foam, insulating and foamed materials, mineral wool, fibre material, felt and Styrodur. The hole at the end of the ergonomic handle is used to hang the knife.
- Hultafors - Quality tools for professionals and craftsmen. Swedish premium quality for professional craftsmen since 1883. For 140 years, we have been developing innovative tools that you can rely on in any situation. We have always focused on precision, innovation and quality. This will not change in future, either.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004ZFE9W6 |
| Batteries Required? | No |
| Batteries included? | No |
| Blade edge | serrated |
| Blade length | 50 Millimetres |
| Colour | Multi-colour |
| Customer Reviews | 4.6 4.6 out of 5 stars (708) |
| Date First Available | 5 May 2011 |
| Handle material | Polypropylene |
| Handle/lever placement | End |
| Included Components | Insulation Knife |
| Item Package Quantity | 1 |
| Item Weight | 228 g |
| Item model number | 480384 |
| Manufacturer | Hultafors |
| Material | Carbon Steel |
| Number of Pieces | 1 |
| Part Number | 389010 |
| Product Dimensions | 5 x 2.01 x 46.51 cm; 228 g |
| Special Features | Non Slip |
| Style | Modern |

## Product Details

- **Blade length:** 50 Millimetres
- **Blade material:** Plastic
- **Brand:** Hultafors
- **Colour:** Multi-colour
- **Handle material:** Polypropylene
- **Item length:** 465 Millimetres
- **Item weight:** 228 Grams
- **Manufacturer:** Hultafors
- **Material:** Carbon Steel
- **Style:** Modern

## Images

![Hultafors Insulation Knife Made of Japanese Carbon Steel I 300 mm x 50 mm Blade I I Incl. Blade Guard I for Cutting a Variety of Insulating Materials Such as Styrodur, Mineral Wool etc. I 389010 - Image 1](https://m.media-amazon.com/images/I/61CcuhgRvFL.jpg)

## Questions & Answers

**Q: Which materials can the insulation knife be used for?**
A: The insulation knife is used for cutting rockwool, glass wool, polystyrene, insulating foam, insulating and foamed materials, mineral wool, fibre material, felt and Styrodur.

**Q: What are the dimensions of the mineral wool knife?**
A: The insulation knife has an overall length of 465 mm. The blade is 316 mm long and 50 mm high.

**Q: What is the serrated edge used for?**
A: Thanks to the serrated edge of the blade, very few shavings are created.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product from Hultafors
*by T***D on 22 April 2016*

Bough this as I plan to insulate a new garden shed. I have bought Hultafors craft and utility knives in the past and despite their very modest pricing I have found them to be some of the best utility knives I own (honestly - check the range out). Have tried this on some spare mineral wool and it cuts beautifully. What I also like about the blade is that it is marked in one cm intervals up to 30 cm. Blade comes with a neat plastic blade guard which can also be used for hanging the knife up when finished.

### ⭐⭐⭐⭐⭐ Right tool for cutting insulation
*by M***N on 28 June 2022*

Important not to blunt the blade by cutting with something under insulation to protect blade from the ground like a length of gutter when cutting to length, otherwise cut to width whilst roll is still wrapped. This blade is long enough to reach centre of the roll and stayed sharp after cutting 23 1200mm rolls into 400mm widths. I bought a shorter cheaper knife and a multi blade Stanley knife as backup but they weren’t needed.

### ⭐⭐⭐⭐⭐ Much better than a wood saw!
*by B***T on 22 April 2015*

Really handy knife for cutting rigid board type insulation such as Celotex and Kingspan etc. Doesn't spit out loads of fine dust like when using a wood saw and is plenty long enough, with a decent handle to grip hold of. The blade is quite flexible, which is extremely handy for when you need to trim off excess expanding foam which has set but need to cut it off neatly and flush to an adjacent surface. Also great for cutting wool type materials, as another reviewer said but make sure you have something like that laid on a piece of soft timber during the process, so you can safely apply downward pressure and not end up just slicing yourself open, which would be very easy.

## Frequently Bought Together

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-01-29*