Flexible filler spatula | FFK 056111 | 560 mm (22 in) (Flexisander)

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The world's best tools for filling curved surfaces

The flexible filler spatula FFK 056111 is a unique, patented tool for applying filler to flat and curved surfaces.

With this tool, you can quickly and easily create ideal curves and surfaces. Due to its size and high flexibility, this type of filling spatula is particularly suitable for filling smaller and medium-sized surfaces with a small radius of curvature.

Filling spatula is particularly suitable for use in car repairs, shipbuilding, furnituren manufacture, and the production of models and composites.The filling spatula is designed for filling concave and convex surfaces.

See a test that shows our principles:


Demonstration of the flexible filler

As you can see, flexible filler can save you a lot of time (and pain in the back). In addition, it can save you a lot of material, which in the longer term also means a significant cost reduction.


Some areas are very difficult to handle properly without flexible fillers:


Filling CURVED surfaces is demanding

The main reason is because unlike a wall, ship or car bodies are not flat. They are curved. Unfortunately, ordinary tools are not. With a rigid spatula or a rigid sander, you can notice that they are connected in only one point with the surface. More curved the surface is, smaller contact between spatula or sander and your material is. This means uneven layers of filler and badly sanded surface. If you do it ruthlessly, your material suffers. If you want to do it precisely, you sooner or later understand, that you do not have enough time to make it perfect. With the wrong tools, any unevenness costs you a lot of effort, time, money and the result is just bad. Flexisander tools make it quick and easy.


Filling curved surfaces precisely without the right tools is hard! The operator needs to be a very skilled person because every bad move can cause an unevenness or even damage.

It is also very time-consuming activity which is in other words very expensive for companies. No wonder companies like Boeing, Delphia yachts or Škoda Auto use our products.

How to apply body filler and make perfect contour on Chevrolet corvette 1958


What the right tools do for you?

  • Save a lot of time
  • Save costs of a material
  • Versatile usage
  • Eliminates the human factor
  • Perfect result every time


UNIQUE DESIGN - Flexisander flexible filling spatulas are specially designed for filling both curved and flat surfaces. The technical solution behind the Flexisander flexible filling spatula was inspired by windshield wipers and enables filling of surfaces with convex and concave curvatures.

BENEFITS - With the Flexisander flexible filling spatula, you can easily and quickly create ideal curves and surfaces; apply the right amount of filler and this will significantly reduce the time of subsequent sanding.

DURABLE CONSTRUCTION - An all-aluminum body guarantees trouble-free long-term use.

APPLICATION - Our Flexisander flexible spatulas are suitable for vehicle body projects, building and repair of ships, the woodworking industry, the composite industry and wherever it is necessary to fill large curved and flat surfaces


When surface quality is on the first place

The first concept of FLEXISANDER/FLEXICAT tools was developed by Petr Froněk, INNOVIA company founder, during the construction of steel yachts.  The basic idea was to develop a tool that would greatly simplify and facilitate the process of very difficult filling and sanding of hulls.

Based on these requirements, a special flexible board has been designed, which is evenly pressed against the filled or sanded surface by means of a plurality of levers. By doing so, it simply creates the desired ideal convex or concave curved surface.

Already during primary testing, significant time savings have been achieved, with the perfect surface quality. Additionally, the tools fundamentally eliminate the so-called human factor.

The first inspiration was for all the well-known and generationally proven car wiper principle. This simple and worldwide everyday principle has been successfully used in the design of the entire FLEXISANDER range of flexible hand-held and machine-driven tools such as control bars, filing plates, hand sanding plates and sanders.

If you would like to know more about us and about technology of your future tools: 




It has a great usage while renovating cars, but you can also make use of it while filling boat, furniture, airplanes... basically any flat or curved surface. Even walls:


Who already use our tools?

At present, these companies belong among the customers: Boeing (USA), Airbus (EU), Škoda Auto (CZ), Bavaria yachts (DE)Delphia yachts (PL) and hundreds of others from all industry fields plus hobby users. We even got awards for our tools, like Red Dot Design Award, Vodafone The Idea Of The Year, Czech Innovation award and nomination for the best sander technical solution at the renowned international trade fair METS Amsterdam.



You're not risking anything. Use it for a month and if you will find out, that this is not for you, we will refund you.
It is all made of quality steel and professionally made components. It will last you for ages!


Buy the world's best tools for filling curved surfaces.


LENGHT: 560 mm (22 in)
WIDTH: 115 mm (4 1/2 in)
WEIGHT: 1.3 Kg (2.9 lb)