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Pull-Off Adhesion Strength Test of Gypsum.

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In-situ evaluation of bond strength between plaster and substrate using controlled tensile loading

Pull-off adhesion strength Test of gypsum with concrete, plaster or masonary is a crucial evaluation to determine how well a wall putty adheres to the existing surface. This test measures the Pull-off stress required to cause separation at the interface, providing a direct assessment of the adhesion quality, compatibility, and long-term performance of repair systems. At Global Lab, we conduct pull off adhesion strength Testing as per ASTM C1583 standard using precision pull-off adhesion testers. Our NABL-accredited testing ensures accurate data on pull off adhesion strength, helping engineers, contractors, and material manufacturers validate the reliability of repair and overlay systems under actual service conditions.

Why Pull-Off Adhesion test of GypsumMatters.

Ensures Durability of gypsum adhesion on existing surface for Repair & Overlay Systems

A strong bond ensures that the repair or overlay material remains securely attached to the existing concrete or masonary surface under mechanical stress.

Verifies Surface Preparation Quality

Proper surface preparation — including cleaning, roughening, and removal of laitance — is critical to achieving durable adhesion. The test confirms whether the preparation methods used were effective.

Assesses Compatibility of Materials

Different repair mortars or polymer-modified systems have varying thermal and mechanical properties. Bond testing ensures compatibility between the substrate and the overlay, reducing the risk of delamination or debonding over time.

Quality Control for Site Repairs & Product Validation

The test provides on-site verification for repair projects and performance validation for manufacturers developing new materials.

NDT TESTING

GL Advantages.

  • Accredited facility: NABL-grade laboratory with traceable calibration and strict QA systems.

  • Standards compliance: Tests performed to ASTM C1202 (Rapid Chloride Permeability Test) and applicable IS/EN methods.

  • Experienced analysts: Concrete technologists who interpret results and recommend mitigation.

  • Fast, reliable reporting: Clear reports with test data, graphs, comparative benchmarks, and practical recommendations.

  • Field + Lab capability: On-site sampling, specimen curing, and post-test consulting.

Global Lab Advantage.

Accredited facility.
Standards compliance.
Experienced analysts.
Fast, reliable reporting.
Field + Lab capability.

Applications Pull-Off Adhesion Strength Test for Gypsum is essential for: Residential & commercial buildings, Hotels, malls & office interiors, Gypsum plaster applied on concrete or blockwork, Gypsum skim-coat evaluation before paint/putty, Drywall joints & gypsum board finishing, Repair & renovation quality checks, Ceiling finishes and false ceiling interfaces Any project requiring verification of gypsum adhesion strength
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Pull-Off Adhesion Strength Test of Gypsum
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On-Site Testing Across India

Global Lab provides comprehensive testing for construction and engineering materials, including concrete, cement, steel, aggregates, bitumen, soil, tiles, paver blocks, and other civil and infrastructure materials. We also handle customized tests as per client or project specifications.

Yes. Our team is equipped with mobile testing facilities and field instruments for on-site sampling, inspection, and testing — ensuring quick and reliable results without disrupting your project timelines.