In the world of paints and coatings, achieving a strong bond with the underlying surface is crucial for ensuring long-term performance. This article introduces the SADPO500/A, a portable digital pull-off device with automated features, set to revolutionize the way we assess adhesion.

This instrument gauges a coating’s pull-off strength by measuring the tensile force it can withstand before detaching.

Instruments for evaluating coating adhesion

Numerous tools are available for assessing the adhesion of coatings. Here are a few examples:

Multifunctional Digital Coating Thickness Gauges:

Coating thickness gauges are employed to non-destructively measure the thickness of coatings on metallic substrates. They are ideal for quality control across various industries, including automotive, marine, and construction. These instruments can measure both insulating and non-ferromagnetic coatings.

Cross Hatch Tester

This SADT502 tool is used to evaluate the adhesion of various types of coatings through destructive testing but limited to a very small surface area. It utilizes a metal head with blades set at specific distances to measure the adhesion of coatings with different thicknesses. This tool is commonly employed alongside coating thickness gauges, hardness testers, glossmeters, and colour difference meters.

Digital Tensile Adhesion Tester [Video]

This tool, also known as Pull-off, measures the force required to pull a metal disk which is attached to coating materials using hydraulic pressure. Both the manual and the new automatic models are available.

These tools are easy to use, accurate, versatile and durable.

Features include a speed dial, data storage with date and time, and pressure display in various units.

The device is weatherproof and equipped with a built-in rechargeable lithium battery.

In the following videos, we will see two pull-off models.


Let’s begin with the video featuring the manual model.



Now, let’s move on to the automatic model, showcasing the innovations that make the process smoother.

Our Pull-off Featured in “Pitture e Vernici” Magazine

We are thrilled to announce our feature in the prestigious magazine “Pitture e Vernici”As a leader in the coatings and raw materials industry, they cover topics ranging from additives and polymers to manufacturing technologies and safety. Being recognized on a such global platform is a significant achievement for us.

To read the entire article dedicated to our pull-off technology, you can access the online edition by clicking on the red text above.

Features of the New SADPO500/A Automatic Digital Pull-off Model

EFFICIENT Portabile: Can be used anywhere.

Rechargeable Lithium Battery: No need for external power source.

Easy to Read: Results displayed directly on the LCD screen.

AUTOMATIC Electronic Regulation: The hydraulic pump is electronically controlled to maintain consistent and continuous pressure.

Built-in Memory: It stores crucial test data.

ACCURATE Professional Calibration: Each pressure system is calibrated with an accuracy of 1% [2].

High-Precision Sensors: They guarantee a resolution of 0.01 MPa.

INTELLIGENT Storage for Results: Stores all relevant data.

USB Interface: No additional software needed; the tester functions as a USB drive.

DURABLE Sturdy Design: Dust and shock-resistant, perfect for harsh environments. Weatherproof, sealed enclosure [1, 2].


In the world of paints and coatings, adhesion is crucial. The right tools can make the difference between a flawless job and one that requires touch-ups.

The SADPO500/A represents a breakthrough in adhesion measurement technology because it’s easy to use, precise and durabile. This innovation not only helps you work with confidence but also guarantees long-lasting results for your customers.

Whether you are in the automotive, nautical, or construction industry, the ability to evaluate adhesion is essential. With S.A.M.A. Italia, you have the ideal tools for your needs.

If you have any questions or need specific advice, please don’t hesitate to email us at

Film mechanical performance measurement is the perfect complement of coating thickness measurement when it comes to controlling the quality of coatings applied on different substrates.

Of course, this makes measuring all the properties related to the mechanical performance of the coating a very important activity for many different industries to guarantee their products match the standards of their sector.

What is film mechanical performance measurement?

Measuring the mechanical performance of a film or coating involves a series of checks and verifications that fall in the category of non-destructive testing.
However, some of the tests used for film mechanical performance measurement may alter the state of the final product or sample that is being tested.

Some of the most common tests included in the series of film mechanical performance measurement are:
  • Verification of the adhesion to the substrate.
  • Verification of coating elasticity.
  • Surface hardness test.
  • Scratching resistance test.
  • Abrasion verification.
  • Rubbing verification.

Among the tests mentioned above, the verification of the adhesion to the substrate must be highlighted, as it provides information regarding the durability of the coating.

A low adhesion result may indicate a premature failure of the coating layer.

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Why is film mechanical performance measurement important?

It was mentioned before that this series of measurements complement the coating thickness measurement, an essential activity for quality control.
Therefore, film mechanical performance measurement adds up to improve the quality control of coated products.

Working together with the coating thickness measurement, film mechanical performance measurement provides quality control operators the capability of:

  • Identifying the possibility of coating layer loss that may result in corrosion.
  • Identifying incorrect coating adhesion that may lead to premature failure of the coating.
  • Identifying that the coating mechanical properties match design requirements.
  • Identifying that coating coming from suppliers matches order requirements.

Moreover, timely detecting any problem on the coating can result in an increased lifespan of the coated part and a very significant reduction of costs in the long term.

How to measure the mechanical performance of coatings?

As it was described above, there are different tests used to measure the mechanical performance and different properties of coatings. Let’s dig into each of them.

Verification of the adhesion to the substrate

The verification of the adhesion to the substrate are usually performed by means of instruments known as cross hatch adhesion testers or pull-off adhesion testers.

Cross hatch adhesion testers are generally used to determine if the various coats of paint are firmly anchored to the support. When various layers of different coating materials are applied, these instruments allow one to verify the adhesion between layers.

The measuring procedure consists in sliding the head of the instrument on the sample in orthogonal direction to track a grid on the coating. Then, the operator compares the status of the coating after the test with an internationally acknowledged table to determine the grade of adhesion of the sample tested.

Cross hatch tester SADT502

In the picture: Cross hatch tester SADT502

Futhermore, we also offer cross hatch adhesion testers that come with different metal heads.

For more information on cross hatch adhesion testers, check out our SADT502 model here.

On the other hand, pull-off adhesion testers are used to measure the force required to pull a metallic dolly with known diameter away from its substrate by using hydraulic pressure.

The instrument evaluates the adhesion or pull-off strength of a coating by determining the greatest tensile pull-off force that it can bear before detaching.
We provide a handheld digital pull-off adhesion tester that makes it easy for any quality control operator to perform this test.

Verification of coating elasticity

The tests to verify the elasticity of the coating can be performed by using three different instruments.

First, we have coating bend testers. These instruments enable the operator to determine the resistance to crack or the stripping performance of the coating. The process consists in bending the sample against cylindrical shafts or conical mandrels to see whether any cracks or stripping appear. For more information, check out our SA564, SA566, and SA568 models.

The second option is the impact tester. Impact tests can be performed on a wide variety of coating materials including:

  • Paint.
  • Varnish.
  • Water-based wood coatings.
  • High viscosity plastic coatings.
  • Laminated coatings.

To learn more about our impact testers check out our SAITS301, SAITS305 and SAITS306 models.

Digital Cupping tester SACT-309 - SACT-310

In the picture: Digital Cupping tester SACT-309 – SACT-310

Finally, the third option are our cupping testers. Cupping testers are normally used to evaluate crack resistance and detachment from metal substrate of a coated surface. Cupping tests are very accurate and can be performed both manually or automatically depending on the type of instrument used. Check out our SACT309 and SACT310 models to learn more.

Surface hardness test

This is considered a surface-type check that can be performed to test the hardness of the coating, which is another mechanical property. The most common surface hardness tests instruments used to check the hardness of coatings are:

These three instruments are very helpful for quality control operations. Selecting one or the other will depend on each specific case.

Pendulum hardness tester SA509

In the picture: Pendulum hardness tester SA509

Scratching resistance test

This is a process used to measure the hardness of the coating by learning how resistant it is to scratches.

The procedure involves the generation of a controlled scratch with an indenter on a selected area. Then, a stylus is moved over a specimen surface with a linearly increasing load until failure occurs at critical loads. According to test procedures, constant or progressive load can be applied in order to get different levels of failure. The load at which such failure of the coating occurs is termed as the critical load.

Of course, high accuracy is of uttermost importance, which is why an automated scratch tester like our SAAST520 model is recommended.

Abrasion and rubbing verification

This verification involves assessing the resistance to abrasion and rubbing of different coating materials and even printed materials like labels.

There are different tests that can be applied and different instruments to be used. Among the most common instruments, we have:

How to choose the right film mechanical performance measurement tool?

Acquiring a film mechanical performance measurement tool is very important, and it is also important to select the best option for the application at hand. There are different aspects that require consideration when selecting the right tool.

The most relevant are:

  • The type of test that is required.
  • Whether the surface accepts alteration or not.
  • The type of material being tested.
  • The need for portability.

Would you like to see the film mechanical performance measuring instruments we offer in order to select the most suitable for your application?

You can immediately look through and consult the technical data sheets here.

On the other hand, if you are not sure or have any doubts about measuring and controlling the mechanical properties of coatings, please contact us and one of our experts will gladly help you.

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