ISO 19862 Sealant Cyclic Extension-Compression Durability Test

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Material strength is a course that most engineering fields are required to study in university education. This interesting course is very practical and makes use of testing equipment in the materials laboratory.

Mechanical testing of industrial products and components is essential to ensure their load-bearing, fatigue resistance, and impact resistance, directly preventing production accidents and ensuring stable operation of equipment. UnitedTest can cover a full range of tests including tensile, hardness, and fatigue, complying with national and international standards, and provides customized industrial mechanical testing solutions.

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Mechanical testing in the packaging industry determines the packaging's resistance to compression, impact, and tension, directly ensuring the safety of contents during storage and transportation. UnitedTest can cover comprehensive mechanical testing for packaging, complying with ISO, ASTM Standards, and provides customized testing solutions for compression, drop, tear, and more.

Mechanical testing in the transportation industry concerns the load-bearing and fatigue resistance performance of core components such as vehicles, tracks, and containers, directly ensuring transport safety and equipment durability. UnitedTest can cover mechanical testing for all types of transportation materials, complying with national and international standards, and provides customized testing solutions including tensile, fatigue, and impact tests.

Metallurgical testing examines the properties of metallic materials to determine if a particular metal is appropriate for its intended use.

Testing of polymer materials covers mechanical, thermal, and chemical properties, verifying strength, heat resistance, composition, and ensuring product quality and compliance.

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Tensile test evaluates material resistance to stretching, measuring strength/elongation critical for quality control. UnitedTest offers universal tensile testers (10-600KN) compliant with ASTM/ISO standards, providing tailored solutions for metals, polymers, medical & industrial materials.

Compression test assesses material resistance to compressive loads, measuring strength/deformation critical for quality validation. UnitedTest offers compression testing machines compliant with ASTM/ISO standards, providing tailored solutions for concrete, plastics, metals and industrial components.

Flexural & Bend tests evaluate material resistance to bending forces, measuring strength, stiffness and ductility for quality assurance. UnitedTest provides flexural testing machines (3-point/4-point bend) compliant with ASTM/ISO standards, offering tailored solutions for composites, plastics, metals and construction materials.

Torsion Test evaluates material resistance to rotational forces, measuring torsional strength/ductility critical for fasteners, insulators, shafts. UnitedTest offers torsion testers compliant with ASTM A938/ISO 16047, providing tailored solutions for automotive, aerospace, fastener industries.

Fatigue Test assesses material durability under cyclic loading, critical for predicting service life of industrial components. UnitedTest offers fatigue testing systems (axial/bending/torsion) compliant with ASTM E466/ISO 12106, providing tailored solutions for automotive, aerospace and manufacturing sectors.

Peel Test measures material adhesion strength by evaluating resistance to peeling forces, critical for adhesives, films, packaging. UnitedTest offers peel testers compliant with ASTM D903/ISO 8510, covering 90°/180° peel tests, and tailored solutions for packaging, automotive, textile industries.

Impact Test evaluates material resistance to sudden shock loads, critical for assessing toughness and fracture risk. UnitedTest offers impact testers (Charpy/Izod/fall weight) compliant with ASTM E23/ISO 148, providing tailored solutions for metals, plastics, glass and industrial components.

Tear & Shear Test evaluates material resistance to tearing and shearing forces, measuring critical strength parameters for quality control. Tear tests (Elmendorf/trouser/trapezoidal) assess resistance to crack propagation in films/fabrics, while shear tests measure resistance to parallel forces in joints/bolts. UnitedTest provides universal testing machines (10KN-600KN) with specialized fixtures for both tests, compliant with ASTM D624/D3164 and ISO standards, serving automotive, packaging and construction industries.

Hardness test measures material's resistance to permanent indentation, critical for quality control. UnitedTest offers universal hardness testers (Rockwell/Brinell/Vickers) compliant with ASTM/ISO standards, plus tailored hardness testing solutions for diverse industrial needs.

Biaxial/triaxial tests evaluate material performance under multi-axis loads, critical for biomaterials, metals and composites. UnitedTest provides compliant testing machines (ASTM/ISO) for planar biaxial, static/fatigue triaxial tests, with tailored solutions for industrial & biomedical needs.

Friction and wear tests assess material resistance to friction, abrasion and wear, critical for industrial material performance validation. UnitedTest offers tribometers compliant with ASTM G99/ISO standards, covering pin-on-disk, four-ball tests, and tailored friction & wear testing solutions for diverse industries.

Pressure test evaluates material/component resistance to static/dynamic pressure, critical for sealing, strength and safety validation. UnitedTest offers pressure testing machines compliant with ASTM/ISO standards, covering burst, hold-pressure tests, and tailored solutions for industrial, automotive & medical sectors.

Fire test assesses material flammability, heat resistance and fire-retardant performance, critical for safety compliance across industries. UnitedTest offers fire testing equipment compliant with ASTM/ISO/UL standards, providing tailored fire test solutions for building materials, plastics and industrial components.

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ISO 19862 Building Sealant Cycling Durability Tester | Accelerated Weathering Test Machine | UnitedTest

ISO 19862 classifies long-term durability of exterior building joint sealants via combined extension-compression cycling and accelerated weathering exposure. UnitedTest manufactures ISO 19862 compliant sealant durability testing machines for construction sealant performance grading and qualification.

ISO 19862 is an international standard for buildings and civil engineering works that establishes a comprehensive accelerated durability test method for exterior joint sealants. This unique testing protocol integrates repetitive mechanical joint movement, including alternating compression and extension cycles, with multi-factor accelerated weathering conditions such as UV light exposure, thermal heat cycling, water spray and humidity ageing.

The standard evaluates how many weekly movement cycles exterior construction sealants can withstand before developing adhesive failure, cohesive cracking or structural degradation. It delivers accurate long-term durability classification data for exterior facade joints, expansion joints, window perimeter seals and external building sealing systems, supporting sealant formulation optimization, product grading, construction material qualification and industry compliance verification.

UnitedTest designs and manufactures high-precision ISO 19862 sealant durability testing machines. Our integrated test systems precisely simulate synchronized extension-compression cycling and full accelerated weathering environments, producing repeatable ageing performance data for building sealant R&D, factory quality assurance and third-party civil engineering material certification.

Core principle

Test specimens are manufactured with sealant bonded between two parallel mortar substrates. After curing and pre‑conditioning, specimens are held under compression for 3 days inside an accelerated weathering chamber, then shifted to held extension for 4 days within the same weathering environment, completing one full 7‑day cycle.. After each cycle, specimens are inspected for through‑thickness adhesion failure or cohesion failure. Back‑light illumination detects full penetrative cracks (light shining through sealant). The cyclic loading‑weathering sequence repeats up to maximum 10 cycles to determine the durability cycle rating of the sealant‑substrate assembly.

Test Equipment required of ISO 19862 Sealant Cyclic Extension-Compression Durability Test

Universal Tensile testing machine	Cross‑head speed controlled at (5.5 ± 0.7) mm/min for compressing and extending specimens.
Test substrates	Mortar blocks conforming to ISO 13640.
Spacers	Anti‑adherent spacers & PE anti‑adherent film: For joint forming.
Anti‑adherent sheet	Polyethylene (PE) film for casting specimens.
Tools	1. Separators and clamps: Lock specimens at fixed compressed / extended joint width. 2. Ventilated convection oven: Maintain constant (70 ± 2) °C for pre‑conditioning Method B. 3. Water immersion container: Hold distilled water for hot‑wet pre‑conditioning cycles. 4. Measuring device: Measurement accuracy ±0.5 mm for joint dimension and crack depth measurement.

Test Specimen Information:

Quantity: 3 replicate test specimens are required for every test group.

Substrates: Mortar substrate Type 1 or Type 2 complying with ISO 13640; alternative substrates may be used upon mutual agreement of parties. Each specimen uses two separate mortar blocks.

Joint geometry:

Sealant bead original joint width: 12 mm; sealant depth: 12 mm

Mortar block dimensions: each block approx. 75 mm height × 25 mm width ×12 mm thickness

Anti‑adherent 12 mm × 12 mm spacer bars define joint gap during sealant casting.

ISO 19862 Sealant Cyclic Extension-Compression Durability Test

Specimen preparation rules: Follow sealant manufacturer instructions for primer and mixing; avoid air bubbles; press sealant firmly onto substrate inner surfaces; trim sealant flush with substrate faces; remove anti‑adherent backing film as early as practical; spacers remain in‑situ throughout conditioning period.

Pre‑conditioning of specimens (choose either Method A or Method B by agreement):

1. Method A: 28 days storage at (23 ± 2) °C, 50 ± 10 % RH (reference curing condition).

2. Method B: Complete Method A first, then run three repeated heat‑water ageing cycles: heat at 70 °C oven and distilled‑water immersion in defined sequence. After finishing cycles, store specimens 24 h at standard lab climate before starting formal testing.

Test Parameters & Stipulations

Three movement amplitude classes defined in Table 1 (original joint width =12 mm):

Class	Movement Amplitude	Width after extension	Width after compression
25	±25 %	15.0 mm	9.0 mm
20	±20 %	14.4 mm	9.6 mm
12.5	±12.5 %	13.5 mm	10.5 mm

One full cycle duration: 7 days:

3 days: specimen held compressed inside weathering chamber
Transfer out, relax for 1 h, extend within 2 hours, install separators
4 days: specimen held extended in weathering chamber

Maximum test cycles: up to 10 cycles for durability rating scale 1‑10.
Mechanical deformation rate: (5.5 ± 0.7) mm/min for compression and extension actions.
Weathering wetting modes: water spray (default) or recirculated‑water immersion; spray water temperature approx. (21 ± 5) °C; recirculated immersion water (40 ± 5) °C. For xenon‑arc testing, light‑phase relative humidity set to 50 ± 10 % RH

Test Procedures for ISO 19862 Sealant Cyclic Extension-Compression Durability Test

1. Prepare three specimens, implement selected pre‑conditioning (Method A or Method B).

2. Use tensile machine to compress specimen to target class dimension at (5.5 ± 0.7) mm/min rate; fix with clamps.

3. Place clamped compressed specimens into accelerated weathering chamber for continuous 3‑day exposure.

4. Take specimens out of chamber, release clamps, relax specimens for 1 hour.

5. Extend specimens to specified extended dimension at (5.5 ± 0.7) mm/min; install separators to hold extension.

6. Return specimens to weathering chamber for continuous 4‑day exposure.

7. Retrieve specimens; examine for adhesion/cohesion through‑failure; apply back‑lighting to check light penetration. Document cycle number when failure first occurs.

8. Release separators; allow specimens relax for one hour.

9. Repeat compression‑extension‑weathering cycle sequence, maximum up to 10 cycles.

10. Process data following Clause 9 evaluation rules, compile formal test report as Clause 10 requirements.

Industry Application Fields

Building facades, curtain walls and exterior wall expansion joints
Concrete, mortar, masonry and civil‑engineering joints
Glazing perimeter joints when specified together with glazing standards
Bridge/infrastructure non‑structural joints where sealants are exposed to weather
Sealant R&D, manufacturer QC and technical data sheets
Independent laboratories, certification bodies, architects, facade consultants and specifiers
Procurement/specification compliance for exterior waterproofing, air‑tightness and movement joints

It is especially relevant where joints undergo thermal movement, UV exposure, rain/moisture and repeated opening/closing.

Related Stadard:

ISO 8339	Building construction - Sealants - Determination of tensile properties (Extension to break)
ASTM C1135	Standard Test Method for Determining Tensile Adhesion Properties of Structural Sealants
ISO 8340	Building construction - Sealants - Determination of tensile properties at maintained extension
ASTM C1635	Adhesion/cohesion at fixed extension, including water immersion; explicitly comparable to ISO 8340 and ISO 10590.
ISO 7389	Building construction - Jointing products - Determination of elastic recovery of sealants
GB/T 13477.17	Test method for building sealants—Part 17：Determination of elastic recovery
GB/T 13477.8	Test method for building sealants—Part 8：Determination of tensile properties
ISO 10590	Building Construction Sealants Determination of Tensile Properties of Sealants at Maintained Extension After Immersion in Water
ISO 19862	Buildings and civil engineering works — Sealants — Durability to extension compression cycling under accelerated weathering
ASTM C719	Standard Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle)

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A single column tensile tester is a sophisticated material testing instrument designed for measuring mechanical properties of various materials under tension, compression, bending, shear, and other loading conditions. As the name suggests, it features a single vertical column supporting a moving crosshead that applies force to test specimens.

UnitedTest supplies ISO 8339 compliant tensile test fixture for building construction sealants. Standard sealant joint specimen grips for UTM, test elongation at break & secant modulus, lab certified, custom substrate holders available.

Vice Tensile test fixture for plastics is based on the test standatd ASTM D638, determination of the tensile properties of unreinforced and reinforced plastics in the form of standard dumbbell-shaped test specimens when tested under defined conditions of pretreatment, temperature, speed.

ISO 19862 Sealant Durability Test Equipment — Accelerated Weathering & Cyclic Extension/Compression Systems by UnitedTest

Q1: What is ISO 19862 test and why is it important for building sealants?

A: ISO 19862:2015 evaluates sealant durability under combined cyclic extension‑compression movement plus simultaneous accelerated weathering (UV light, heat, moisture). Real‑world exterior building joints suffer both mechanical cyclic movement from thermal expansion/contraction and outdoor weather ageing at the same time. Many conventional sealant tests check mechanical performance and weathering separately; ISO 19862 simulates real‑service combined stress. It helps predict field failure risks like cohesive cracking, adhesion delamination and water leakage for facade, curtain‑wall and civil‑engineering joint sealants, supporting product grading, specification and quality validation.

Q2: What is the key difference between ISO 19862 and ISO 11431?

A: ISO 11431 assesses adhesion‑cohesion after static weather exposure, without cyclic mechanical movement. ISO 19862 applies cyclic compression‑extension while specimens stay inside the weathering chamber. ISO 19862 better replicates dynamic joint movement for moving exterior joints.

Q3: How long is one full ISO 19862 test cycle? What happens in one cycle?

A: One full cycle takes 7 days total.

3 days: Specimen held compressed inside accelerated weathering chamber.
Take out, relax for 1 hour; extend specimen within 2 hours, fix at extended dimension.
4 days: Specimen held extended inside weathering chamber. After 7 days, inspect failure and record result. The test repeats up to maximum 10 cycles for durability rating 1‑10.

Q4: What counts as a “failure” for ISO 19862 specimens? Are edge‑zone cracks counted?

A: Failure occurs when adhesion loss or cohesive crack runs fully through the whole depth of the sealant; back‑light penetration through the specimen confirms through‑thickness failure. Defects within the 2 mm edge zone on both ends of sealant bead are excluded and NOT counted as failure, due to high local stress generated during specimen preparation and cycling. Only defects outside this 2 mm marginal area are assessed.

Q5: How many specimens are required? How do I calculate final test result?

A: Three replicate specimens are mandatory. Record failure cycle for best, median and worst specimen. If cycle gap between best and median exceeds four cycles, repeat the whole test. Final durability value = rounded mean value of best result plus median result; worst specimen is excluded from calculation.

Q6: Which light source is default for accelerated weathering chamber? Can I use other lamps?

A: Xenon‑arc lamp with daylight filter (ISO 4892‑2) is the default light source. UVA‑340 fluorescent UV lamp or open‑flame carbon‑arc lamp are optional alternatives. If non‑default light source or irradiance level is adopted, it must be clearly documented inside the final test report.

Q7: What wetting modes are allowed in weathering chamber? Spray or immersion?

A: Water spray is default wetting method; recirculated‑water immersion is permitted as alternative. Spray water temperature is around 21 °C ± 5 °C; recirculated immersion water should be kept at 40 °C ± 5 °C. Both methods show acceptable inter‑laboratory correlation in round‑robin tests, yet different degradation mechanisms (hydrolysis, thermal shock) may occur between two wetting approaches.

Q8: Which industry segments use ISO 19862 test?

A: Facade & curtain‑wall manufacturing, civil‑engineering joint material producers, sealant R&D labs, third‑party test laboratories, construction specifiers, pedestrian walkway & balcony joint projects, precast concrete building industry. ISO 11618 (pedestrian walkway sealant product standard) references ISO 19862 as mandatory durability test method.

Q8: Why choose ISO 19862 Sealant Cyclic Extension‑Compression Durability Test System from UnitedTest?

A: UnitedTest manufactures complete ISO 19862:2015 testing equipment for building & civil‑engineering sealants. Our solution performs extension‑compression cyclic test under accelerated weathering, evaluating exterior joint sealant durability, adhesion & cohesion failure. Custom fixtures, xenon‑arc weathering chamber and tensile test modules available for construction material laboratories worldwide.

UnitedTest supplies full‑set testing hardware and customized fixtures to conduct ISO 19862 “Durability to extension‑compression cycling under accelerated weathering” test for building and civil‑engineering sealants.

Exterior facade, curtain wall, precast concrete and pedestrian walkway sealants face combined threats: cyclic joint movement caused by thermal expansion, plus outdoor ageing from UV radiation, heat, rain and moisture. Conventional separate mechanical test or static weathering test cannot fully reproduce real‑world service stress. ISO 19862 test subjects sealant specimens to repeated 7‑day cycles: held compression for 3 days and held extension for 4 days inside the accelerated weathering chamber, up to maximum 10 cycles, to classify sealant durability grade by through‑thickness adhesion / cohesion failure and light‑penetration inspection.

UnitedTest integrated ISO 19862 test solution includes:

High‑precision electromechanical tensile‑compression tester, strictly controls deformation speed at (5.5 ± 0.7) mm/min for specimen compression and extension.
Custom‑designed specimen separators, clamps and mortar‑substrate fixtures supporting Class 12.5 / 20 / 25 movement amplitude requirements.
Matching accelerated weathering chamber options: default xenon‑arc lamp daylight‑filter system (per ISO 4892‑2), also supports UVA‑340 fluorescent UV lamp configuration. Both water‑spray and recirculated water‑immersion wetting modes are supported.
Back‑light inspection tool and high‑accuracy dimension measuring kit for post‑cycle defect assessment.
Oven and water‑immersion container accessories for Method A / Method B specimen pre‑conditioning.

Our test system complies fully with ISO 19862:2015 clauses for specimen preparation, conditioning, 7‑day cyclic test procedure, failure judgement (including 2 mm edge‑zone exclusion rule) and result calculation. Test data can be exported to generate standard‑compliant laboratory test reports.

This test system is widely adopted by sealant manufacturer R&D laboratories, third‑party construction‑material testing institutes and civil‑engineering quality‑control labs globally. It supports sealant product development, batch quality control, product certification and tender‑specification verification for exterior movement‑joint sealants.

UnitedTest’s engineering team provides one‑stop service including fixture customisation, equipment installation, on‑site training and technical consultation for ISO 19862 standard operation. We also support other related sealant standards such as ISO 8339, ISO 11431, ISO 19861, ISO 19863.

We offer customization to meet your specific needs. Our expert team will collaborate with you to develop the perfect product for you

ISO 19862 Sealant Cyclic Extension-Compression Durability Test