🔧 Adhesive / Epoxy Pull-Off Tensile Test

Recently, we supported a customer from the construction industry to evaluate bonding performance using a pull-off tensile test method.

For this test, the customer prepared the sample using small mosaic tile pieces and applied a 5-ton epoxy grip to bond the dolly onto the surface. This is important because epoxy adhesive is typically much stronger than the coating/adhesive layer being tested — ensuring the failure occurs at the actual system (waterproofing/adhesive), not at the dolly bonding interface.

🧪 Test Method (Pull-Off Adhesion Strength)

A dolly is bonded onto the test surface using epoxy. After curing, a tensile load is applied perpendicular to the surface until failure occurs. The instrument records the maximum pull force and calculates the tensile strength based on dolly area.

📌 Test Result

The test recorded:

• Maximum Force: 0.2 kN

• Tensile Strength: 6 MPa

🔍 Why this test matters

Pull-off tensile testing helps evaluate:

• adhesion strength between substrate and coating/adhesive

• surface preparation effectiveness

• risk of delamination or peeling under service conditions

In construction applications, good adhesion performance is critical for long-term durability, especially for waterproofing systems exposed to moisture, temperature cycling, and mechanical stress.

At OBSNAP, we support adhesion and tensile testing services to help customers validate product performance and ensure reliable installation quality.

📩 Feel free to reach out to us for inquiries or technical discussion on your testing requirements.

Amira - 0173129979

Thaya - 01111639979

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