Styrofoam cutter up to 450°C - hot knife for grooves (SKU: G81210 / M51320)
Are you looking for a professional, efficient and precise tool for shaping and cutting insulation materials? The Styrofoam Cutter up to 450°C - Hot Groove Knife (SKU: G81210 or M51320) is a top-of-the-line thermal knife designed for fast and clean processing of various polymer materials. Forget about laborious manual cutting, which causes mountains of useless waste and annoying Styrofoam crumbs. With this powerful hot knife, you will get the job done much faster, extremely precisely and, above all, without unnecessary dirt on the job site.
This versatile thermal cutter is an indispensable tool for facade designers, builders, installers, modelers and DIYers. It allows you to easily create grooves for cables, pipes and other installations and ensures perfectly smooth edges without fraying the material. Whether you are arranging the thermal insulation of a building or creating precise models, this hot knife will become your favorite tool.
Why choose a professional thermal styrofoam cutter?
Classic methods of cutting Styrofoam, such as ordinary hand saws, olfa knives or wire cutters without regulation, leave behind a huge amount of fine particles. These static particles stick to all surfaces, clothes and tools, and their cleaning is extremely time-consuming. The hot groove knife works according to the advanced principle of thermal cutting, which means that the material melts precisely at the cut point. The result is a perfectly straight, smooth and closed edge, which prevents the material from crumbling later. The device is ergonomically designed, easy to use and ready to work in just a few moments.
The main advantages and benefits of using a hot knife

Clean and precise cuts without mess: Since the hot blade melts the material at the cut point, there is no dust or annoying polystyrene chipping while working. Your working environment remains clean and tidy.
Versatile use on various polymers: The tool is ideal for cutting, shaping and gouging polymers such as PP (polypropylene), PVC (polyvinyl chloride) and EPS (expanded polystyrene or styrofoam).
Adjustable cutting depth for perfect grooves: The built-in slider allows for quick and easy adjustment of the blade's working length, which is crucial when creating grooves of uniform depth for installations.
Precise 5-level heat control: Allows you to set the optimal temperature based on the thickness, density and type of material you are working on, preventing overheating or jamming.
Extremely fast heat-up: The device reaches operating temperature in just a few seconds, saving you valuable time on the construction site or in the home workshop.

Technical specifications and features of the device
The 450°C Styrofoam cutter is designed with long-term durability, high performance and user safety in mind. Below are the key technical specifications of the device:

Product code (SKU): G81210 or M51320
Supply voltage: 230 V (standard mains)
Temperature setting range: from 100°C to 450°C
Blade working length adjustment: easily adjustable from 15 mm to 100 mm using the integrated slider
Temperature control system: 5-level manual control for optimal cutting results
Product color: Random (depending on current stock availability)

Precise 5-level temperature setting for each material
Different polymer materials require different temperature regimes for optimal cutting. Too low a temperature can cause the blade to bind and drag, while too high a temperature can cause excessive melting and edge deformation. That's why this hot knife is equipped with a convenient and precise 5-level heat regulator:

Level 1 (100°C): Suitable for more delicate, thinner materials and precise fine corrections.
Level 2 (160°C): Ideal temperature range for easier shaping of sensitive polymers.
Level 3 (230°C): Optimal and most commonly used temperature for standard processing of EPS (Styrofoam).
Level 4 (360°C): Fast and smooth cutting of denser insulation boards and harder materials.
Level 5 (450°C): Maximum power and temperature for the most demanding projects and harder polymer mixtures.

Using a hot knife in practice
This hot groove knife is extremely popular when installing facade insulation and carrying out finishing work. With it, you can easily and in seconds cut grooves for electrical cables, drain pipes, underfloor heating or create unique decorative profiles on the facade. The adjustable blade (from 15 to 100 mm) gives you full control over the cutting depth, meaning you will never accidentally cut through the insulation board deeper than intended.
Thanks to its lightweight design and ergonomic handle, the device does not tire your hands even during long work sessions. The blade glides smoothly through the material, allowing you to create perfect curves, straight lines and complex shapes without any effort.
For a better idea of the device's operation, speed, and exceptional efficiency, watch the video below, which shows the practical use of this top-of-the-line thermal knife in real-world conditions:
Video demonstration of operation:
Watch a video demonstration of the Styrofoam cutter on YouTube
Frequently Asked Questions (FAQ) about the product
What materials can I cut with this thermal knife?
The device is primarily intended for cutting and shaping elements from various types of polymers. It is most often used for EPS (expanded polystyrene or styrofoam), but it also performs exceptionally well in processing PP (polypropylene) and PVC (polyvinyl chloride).
How does the groove blade length adjustment work?
A practical and reliable slider is located on the body of the device. With it, you can easily determine how much of the blade will be exposed and will enter the material. The working length can be adjusted arbitrarily and precisely in the range from 15 mm to 100 mm, which allows you to make grooves of any depth.
Does the device overheat during prolonged operation?
The cutter is designed for safe and stable operation when used in accordance with the instructions for use. For optimal performance, we recommend that you select the appropriate temperature level (from 1 to 5) depending on the material you are cutting. During prolonged continuous operation, allow the device to take short breaks to cool down from time to time, which will significantly extend the life of the heater and the blade itself.


Responsible persons:
GEKO - GEKO SPÓŁKA Z OGRANICZNĄ ODPOWIEDZIALNOŚCIA SPÓŁKA KOMANDYTOWA, ul. Spacerowa 3, 97-500 Kietlin, Poland, (+48) 446824004, geko@geko.pl
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

MAR-POL - MAR-POL SCIMPORT EXPORT M.ŚCIANA, K.ŚCIANA, 26-020 Chmielnik, Suchowola 6a, Poland, obsluga@mar-pol.sklep.pl, +48607865357
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Before use, check that the Styrofoam cutter G81210 / M51320 is undamaged and that the blade and power cord are in perfect condition.
• Connect the device to a 230 V electrical network.
• Select the appropriate temperature level depending on the material and desired cutting method.
• The device allows 5-step temperature setting from 100 °C to 450 °C: 100 °C, 160 °C, 230 °C, 360 °C and 450 °C.
• Use the slider to set the working length of the blade between 15 and 100 mm.
• Wait for the blade to heat up to the selected temperature.
• Guide the blade slowly and evenly through the material without applying excessive pressure.
• After finishing work, turn off the device, unplug it from the power supply and wait for the blade to cool completely.

Useful tips for work:
• Before starting, test a piece of the same material and select the lowest temperature that allows for effective cutting.
• For EPS or Styrofoam, use a steady, slow motion to get the cleanest cut possible.
• Set the working length of the blade only as much as is necessary for the specific thickness or depth of cut.
• When making grooves, make sure that the blade is oriented correctly and that it is not twisted while cutting.
• Secure the material securely before cutting, but make sure that the fasteners are not in the path of the blade.
• Ensure good ventilation, as heating plastic can produce fumes and unpleasant or harmful decomposition products.
• After use, only remove material residues when the blade is completely cool.

Warnings:
• The blade reaches temperatures of up to 450°C and can cause severe burns or ignite materials.
• Do not touch the blade or other hot parts of the device during operation.
• Never leave the device unattended when it is connected to the power supply.
• Do not use a damaged cord, plug, blade or housing.
• Do not use the device in wet or very humid areas.
• Keep flammable materials, liquids and aerosols away from the hot blade.
• Do not use the device for materials for which the manufacturer has not stated suitability.
• When cutting PVC and other plastics, ensure effective ventilation and avoid inhaling the fumes produced.
• Before cleaning, changing the blade or otherwise working on the device, always turn it off, unplug it from the power outlet and wait for it to cool completely.
• Wear safety glasses and heat-resistant protective gloves when appropriate.
• Keep out of reach of children.

Same summary

The 450°C Styrofoam cutter with hot knife is intended primarily for users looking for a quick and precise tool for forming grooves in Styrofoam or similar foam materials. It works well for occasional or project-oriented tasks at home, in the workshop or in the garden, where special shapes need to be adjusted or cut. The cutting accuracy is high, but it should be noted that it is not intended for harder materials such as ceramics or metal, and that it requires some care during prolonged use due to heat. The compromise between power and compactness allows for ease of use, but at the same time limits the versatility of the tool.

Recommendation source: Enaa guides and team experiences.

User view

Typical users of this cutter are home makers, modelers, insulators and anyone who regularly shapes objects from Styrofoam, for example in insulation projects or creative works. In practice, it is most useful where quick adjustment and neatness of the cut in the soft material is important - from model making, decoration to precise adjustments of insulation in smaller construction projects.

Users like to use Geko brand tools because they offer reliable performance and ease of use in a variety of everyday and DIY situations.

Why buy at Enaa

Enaa provides a clear selection of tools for creative and home projects, where the key features of each cutter are described in detail. In addition to the diverse range, you can quickly check whether each product meets your needs, as the relevant data is clearly presented and comparable.

Answers to frequently asked questions

What materials is this cutter best suited for?

The cutter is specially adapted for working with Styrofoam and related foam materials, where it enables clean and precise groove cuts. It is not suitable for cutting harder materials.

What should I consider when using a hot knife?

Caution is recommended during prolonged use due to the high temperature of the blade, so always use the tool on a stable surface and cool it properly after use.

Is it possible to change the blade?

Changing the blade is possible on most of these models, but it is recommended to follow the manufacturer's instructions and only use compatible blades intended for hot knives.

How clean does the blade stay during use?

Due to the high temperature, the blade usually stays relatively clean, as the material melts during the cut and does not deposit in the form of shavings. However, it is still advisable to wipe the blade occasionally after it has cooled.

Description updated: April 2026