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Elcometer 106/6 Pull-Off Adhesion Tester for Coatings on Concrete
Measure Coating Bond Strength on Concrete Surfaces
The Elcometer 106/6 Coatings on Concrete Adhesion Tester is a fully portable, hand-operated pull-off tester specifically designed to measure the bond strength of coatings applied to concrete. It can also be used to assess the tensile strength of hardened concrete on site.
Unlike standard coating adhesion testers that typically use smaller dollies, the Elcometer 106/6 uses a large 50.8 mm (2″) diameter test dolly. The larger test area provides more reliable and repeatable measurements when working with concrete and other applications where pull-off adhesion values are comparatively low.
Direct Numerical Pull-Off Adhesion Measurement
The Elcometer 106/6 uses the established pull-off method. A test dolly is bonded to the prepared coating surface using adhesive. Once the adhesive has fully cured, the tester engages the dolly and an increasing tensile force is applied perpendicular to the surface.
When separation occurs, a dragging indicator retains the maximum value on the engraved scale, providing a direct numerical indication of the force required to separate the coating or concrete from the test surface.
Designed Specifically for Concrete Testing
Coating adhesion values on concrete are generally much lower than those encountered on metal substrates. For this reason, concrete testing commonly requires a larger test area. The Elcometer 106/6 uses a 50.8 mm (2″) dolly rather than the 20 mm dollies commonly used with standard Elcometer 106 adhesion testers.
The tester has a measurement range of 0 to 3.5 MPa (N/mm²), or 0 to 500 psi, making it particularly suitable for evaluating coatings and concrete where lower pull-off strengths need to be measured accurately.
Completely Portable – No Power Required
The Elcometer 106/6 is mechanically operated and requires no batteries or external power supply. Its compact design and supplied carrying case make it particularly useful for field inspections, construction sites and maintenance applications where laboratory equipment is impractical.
Key Features
- Specifically designed for adhesion testing of coatings on concrete
- Can also test the tensile strength of hardened concrete on site
- Direct numerical pull-off adhesion measurement
- Large 50.8 mm (2″) diameter test dollies
- Measurement range from 0 to 3.5 MPa (N/mm²)
- Measurement range from 0 to 500 psi
- Hand operated – no batteries or electrical power required
- Fully portable for laboratory or on-site testing
- Mechanical dragging indicator retains the pull-off value
- Supplied with five reusable 50 mm test dollies
- Optional calibration certificate available
Technical Specifications
| Specification | Elcometer 106/6 |
|---|---|
| Part Number | F106—-6 |
| Description | Elcometer 106 Coatings on Concrete Adhesion Tester – Scale 6 |
| Test Method | Pull-off adhesion |
| Range | 0 – 3.5 MPa (N/mm²) |
| Imperial Range | 0 – 500 psi |
| Dolly Diameter | 50.8 mm (2″) |
| Dimensions | 105 × 210 mm (4 × 8″) |
| Gross Kit Weight | 5.7 kg (12.6 lb) |
| Power Supply | None – mechanically operated |
| Calibration Certificate | Optional |
Understanding the Pull-Off Test
Pull-off testing can reveal more than a simple adhesion value. After the test, the dolly and test area should be examined to identify where the failure occurred. Depending on the coating system and substrate, the result may represent failure between the coating and concrete, failure between coating layers, cohesive failure within the coating, or failure within the concrete itself.
This distinction is important because a test in which the concrete fails before the coating interface indicates a different performance condition from one in which the coating separates cleanly from the substrate.
Testing Coatings Thicker Than 500 µm
Concrete coatings can have significant lateral bond strength, which may produce misleadingly high pull-off values. When the coating is more than 500 µm (20 mils) thick, the coating should be cut through to the substrate around the test area before the dolly is bonded, in accordance with the applicable test procedure.
Thinner coatings may also require cutting when specified by the client, contractor or applicable testing procedure. Whichever method is selected, it should be recorded and used consistently when comparing test results.
Supplied Kit
- Elcometer 106/6 Coatings on Concrete Adhesion Tester
- 5 × 50 mm (2″) test dollies
- Support ring
- Araldite adhesive
- Ratchet spanner
- Carry case
- Operating instructions
Accessories & Replacement Items
| Part Number | Description |
|---|---|
| T10618570 | 50 mm (2″) Diameter Dollies – Pack of 5 |
| T99912906 | Araldite Standard Two-Part Epoxy Adhesive – 2 × 15 ml Tubes |
| KT001910P122 | 50 mm (2″) Diameter Dolly Cutting Tool |
Test Standards
- ASTM D7234
- BS 1881-207
- DIN 1048-2
- EN 1542
- EN 12636
| Part Number | Description | Certificate |
| F106—-6 | Elcometer 106/6 Coatings on Concrete Adhesion Tester – Scale 6 |
 |
| Range | 0 – 3.5MPa (N/mm²) 0 – 500psi | |
| Dimensions | 105 x 210mm (4 x 8″) | |
| Gross weight of Kit | 5.7kg (12.6lb) | |
| Packing List | Elcometer 106/6 Coatings on Concrete Adhesion Tester, 5 x 50mm (2”) dollies, support ring, Araldite adhesive, ratchet spanner, carry case and operating instructions | |
Items & Accessories included:
- Elcometer 106/6 Tester
- 5 x 50mm (2”) dollies
- support ring
- Araldite adhesive
- ratchet spanner
- carry case
- operating instructions
Q&A
Why does the Elcometer 106/6 use a larger dolly than a standard coating adhesion tester?
Pull-off adhesion values on concrete tend to be considerably lower than those encountered on metal substrates. The larger 50.8 mm (2″) dolly increases the test area and helps provide more consistent and reliable measurements at these lower pull-off strengths.
Can the Elcometer 106/6 test the concrete itself as well as a coating?
Yes. In addition to determining the bond strength of coatings applied to concrete, the Elcometer 106/6 can be used to test the tensile strength of hardened concrete on site.
Does the tester require batteries, electricity or a hydraulic pump?
No. The Elcometer 106/6 is a completely mechanical, hand-operated instrument. This makes it particularly convenient for field testing where electrical power may not be available.
What does it mean if the concrete breaks during the pull-off test?
A failure within the concrete indicates that the cohesive strength of the concrete was reached before the tested interface separated. The failure mode should therefore be recorded along with the measured pull-off value when evaluating the coating system.
Do I need to cut around the dolly before performing the test?
For coatings thicker than 500 µm (20 mils), cutting through the coating to the concrete around the test area is required by the applicable concrete pull-off procedure to prevent lateral coating strength from artificially increasing the result. Thinner coatings may also be cut when required by the project specification.
Are replacement dollies available?
Yes. Replacement 50 mm dollies are available in packs of five. Replacement two-part epoxy adhesive and a 50 mm dolly cutting tool are also available separately.
Elcometer 106/6 Pull-Off Adhesion Tester for Coatings on Concrete
Measure Coating Bond Strength on Concrete Surfaces
The Elcometer 106/6 Coatings on Concrete Adhesion Tester is a fully portable, hand-operated pull-off tester specifically designed to measure the bond strength of coatings applied to concrete. It can also be used to assess the tensile strength of hardened concrete on site.
Unlike standard coating adhesion testers that typically use smaller dollies, the Elcometer 106/6 uses a large 50.8 mm (2″) diameter test dolly. The larger test area provides more reliable and repeatable measurements when working with concrete and other applications where pull-off adhesion values are comparatively low.
Direct Numerical Pull-Off Adhesion Measurement
The Elcometer 106/6 uses the established pull-off method. A test dolly is bonded to the prepared coating surface using adhesive. Once the adhesive has fully cured, the tester engages the dolly and an increasing tensile force is applied perpendicular to the surface.
When separation occurs, a dragging indicator retains the maximum value on the engraved scale, providing a direct numerical indication of the force required to separate the coating or concrete from the test surface.
Designed Specifically for Concrete Testing
Coating adhesion values on concrete are generally much lower than those encountered on metal substrates. For this reason, concrete testing commonly requires a larger test area. The Elcometer 106/6 uses a 50.8 mm (2″) dolly rather than the 20 mm dollies commonly used with standard Elcometer 106 adhesion testers.
The tester has a measurement range of 0 to 3.5 MPa (N/mm²), or 0 to 500 psi, making it particularly suitable for evaluating coatings and concrete where lower pull-off strengths need to be measured accurately.
Completely Portable – No Power Required
The Elcometer 106/6 is mechanically operated and requires no batteries or external power supply. Its compact design and supplied carrying case make it particularly useful for field inspections, construction sites and maintenance applications where laboratory equipment is impractical.
Key Features
- Specifically designed for adhesion testing of coatings on concrete
- Can also test the tensile strength of hardened concrete on site
- Direct numerical pull-off adhesion measurement
- Large 50.8 mm (2″) diameter test dollies
- Measurement range from 0 to 3.5 MPa (N/mm²)
- Measurement range from 0 to 500 psi
- Hand operated – no batteries or electrical power required
- Fully portable for laboratory or on-site testing
- Mechanical dragging indicator retains the pull-off value
- Supplied with five reusable 50 mm test dollies
- Optional calibration certificate available
Technical Specifications
| Specification | Elcometer 106/6 |
|---|---|
| Part Number | F106—-6 |
| Description | Elcometer 106 Coatings on Concrete Adhesion Tester – Scale 6 |
| Test Method | Pull-off adhesion |
| Range | 0 – 3.5 MPa (N/mm²) |
| Imperial Range | 0 – 500 psi |
| Dolly Diameter | 50.8 mm (2″) |
| Dimensions | 105 × 210 mm (4 × 8″) |
| Gross Kit Weight | 5.7 kg (12.6 lb) |
| Power Supply | None – mechanically operated |
| Calibration Certificate | Optional |
Understanding the Pull-Off Test
Pull-off testing can reveal more than a simple adhesion value. After the test, the dolly and test area should be examined to identify where the failure occurred. Depending on the coating system and substrate, the result may represent failure between the coating and concrete, failure between coating layers, cohesive failure within the coating, or failure within the concrete itself.
This distinction is important because a test in which the concrete fails before the coating interface indicates a different performance condition from one in which the coating separates cleanly from the substrate.
Testing Coatings Thicker Than 500 µm
Concrete coatings can have significant lateral bond strength, which may produce misleadingly high pull-off values. When the coating is more than 500 µm (20 mils) thick, the coating should be cut through to the substrate around the test area before the dolly is bonded, in accordance with the applicable test procedure.
Thinner coatings may also require cutting when specified by the client, contractor or applicable testing procedure. Whichever method is selected, it should be recorded and used consistently when comparing test results.
Supplied Kit
- Elcometer 106/6 Coatings on Concrete Adhesion Tester
- 5 × 50 mm (2″) test dollies
- Support ring
- Araldite adhesive
- Ratchet spanner
- Carry case
- Operating instructions
Accessories & Replacement Items
| Part Number | Description |
|---|---|
| T10618570 | 50 mm (2″) Diameter Dollies – Pack of 5 |
| T99912906 | Araldite Standard Two-Part Epoxy Adhesive – 2 × 15 ml Tubes |
| KT001910P122 | 50 mm (2″) Diameter Dolly Cutting Tool |
Test Standards
- ASTM D7234
- BS 1881-207
- DIN 1048-2
- EN 1542
- EN 12636
| Part Number | Description | Certificate |
| F106—-6 | Elcometer 106/6 Coatings on Concrete Adhesion Tester – Scale 6 |
|
| Range | 0 – 3.5MPa (N/mm²) 0 – 500psi | |
| Dimensions | 105 x 210mm (4 x 8″) | |
| Gross weight of Kit | 5.7kg (12.6lb) | |
| Packing List | Elcometer 106/6 Coatings on Concrete Adhesion Tester, 5 x 50mm (2”) dollies, support ring, Araldite adhesive, ratchet spanner, carry case and operating instructions | |
Items & Accessories included:
- Elcometer 106/6 Tester
- 5 x 50mm (2”) dollies
- support ring
- Araldite adhesive
- ratchet spanner
- carry case
- operating instructions
Q&A
Why does the Elcometer 106/6 use a larger dolly than a standard coating adhesion tester?
Pull-off adhesion values on concrete tend to be considerably lower than those encountered on metal substrates. The larger 50.8 mm (2″) dolly increases the test area and helps provide more consistent and reliable measurements at these lower pull-off strengths.
Can the Elcometer 106/6 test the concrete itself as well as a coating?
Yes. In addition to determining the bond strength of coatings applied to concrete, the Elcometer 106/6 can be used to test the tensile strength of hardened concrete on site.
Does the tester require batteries, electricity or a hydraulic pump?
No. The Elcometer 106/6 is a completely mechanical, hand-operated instrument. This makes it particularly convenient for field testing where electrical power may not be available.
What does it mean if the concrete breaks during the pull-off test?
A failure within the concrete indicates that the cohesive strength of the concrete was reached before the tested interface separated. The failure mode should therefore be recorded along with the measured pull-off value when evaluating the coating system.
Do I need to cut around the dolly before performing the test?
For coatings thicker than 500 µm (20 mils), cutting through the coating to the concrete around the test area is required by the applicable concrete pull-off procedure to prevent lateral coating strength from artificially increasing the result. Thinner coatings may also be cut when required by the project specification.
Are replacement dollies available?
Yes. Replacement 50 mm dollies are available in packs of five. Replacement two-part epoxy adhesive and a 50 mm dolly cutting tool are also available separately.
