Overview
ISO 9047:2001 - Building construction - Jointing products - Determination of adhesion/cohesion properties of sealants at variable temperatures - specifies a laboratory method to evaluate the adhesion and cohesion behaviour of predominantly elastic sealants used in building joints when exposed to temperature cycling. The standard defines specimen preparation, conditioning, cyclic extension/compression at defined temperatures and amplitudes, and reporting requirements to assess loss of adhesion or cohesive failure.
Key topics and technical requirements
- Scope: Applies to sealants with predominantly elastic behaviour used in building construction joints.
- Specimens & substrates: Two matching substrate pieces (mortar, anodized aluminium or glass per ISO 13640) bonded with a sealant bead; anti-adherent backing and 12×12 mm spacers used during preparation.
- Apparatus: Ventilated oven (70 ± 2 °C), refrigerated enclosure (−20 ± 2 °C), immersion container for distilled water, test machine capable of (55 ± 0,7) mm/min, and measuring device with 0,5 mm resolution.
- Conditioning methods:
- Method A: 28 days at (23 ± 2) °C, 50 ± 5 % RH.
- Method B: Method A followed by three cycles combining oven (70 °C) and water immersion (23 °C) to simulate heat/water influence.
- Cyclic testing: Extension/compression cycles at amplitudes of ±12.5 %, ±20 % or ±25 % (or agreed values). Specimens alternate between −20 °C (extension) and 70 °C (compression) with hold periods and rest days over two weeks.
- Evaluation: Inspect for adhesive/cohesive failures and measure depth of failure; report detailed test data (sealant type, batch, substrates, primer, conditioning, amplitude, failure locations, deviations).
Practical applications
- Performance verification of sealants for façade joints, window perimeter seals, expansion joints and other building envelope applications where thermal movement occurs.
- Product development and quality control to compare formulations under realistic temperature cycling.
- Technical evidence for product specifications, compliance testing, system selection, and failure analysis.
Who uses ISO 9047:2001
- Sealant manufacturers and R&D teams
- Independent testing laboratories and certification bodies
- Specifiers, façade engineers, architects and building envelope consultants
- Contractors and quality assurance personnel evaluating jointing products
Related standards
- ISO 6927 - Sealants - Vocabulary (terms and definitions referenced)
- ISO 13640 - Specifications for test substrates (substrate materials and preparation)
Keywords: ISO 9047:2001, sealant testing, adhesion/cohesion, jointing products, building construction, temperature cycling, conditioning, extension/compression.
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