Epoxy resin adhesive testing service

Epoxy Resin Adhesive Testing Service for Global Industrial Bonding and Sealing Applications

As an ISO/IEC 17025 accredited laboratory, we deliver a comprehensive epoxy resin adhesive testing service that verifies mechanical strength, thermal properties, chemical durability, electrical insulation, and long-term ageing behaviour. Our epoxy resin adhesive testing service supports manufacturers, formulators, and exporters of structural adhesives, electronic encapsulants, and civil engineering bonding systems who must demonstrate conformity to ISO, ASTM, EN, and regional performance standards across the European Union, North America, and Asia. Every test is performed under our CNAS-accredited quality system, producing reports that are accepted by notified bodies, engineering authorities, and global procurement teams.

Product Samples We Regularly Test Under Our Epoxy Resin Adhesive Testing Service

Two-component structural epoxy adhesives — for metal-to-metal bonding in construction, automotive, and aerospace
One-component heat-cure epoxy adhesives — for high-strength applications in consumer electronics and medical devices
Epoxy resin flooring and screed compounds — including self-levelling and anti-static industrial floor coatings
Epoxy grouts and anchoring adhesives — for rebar anchoring, crack injection, and concrete repair
Electrically insulating epoxy encapsulants and potting compounds — for transformers, sensors, and printed circuit board protection
Epoxy-based carbon fiber reinforced polymer laminating resins — for structural strengthening and wind turbine blade bonding
Epoxy adhesive films and prepregs — for composite panel lamination and sandwich structure bonding
Conductive and thermally conductive epoxy adhesives — for LED bonding, chip attach, and heat sink attachment

Mechanical and Bonding Performance Testing Under Our Epoxy Resin Adhesive Testing Service

Lap shear strength of bonded assemblies per ISO 4587 and ASTM D1002 — single-overlap metal-to-metal specimens are pulled to failure to measure the ultimate shear stress, providing the primary design value for structural epoxy adhesive joints in load-bearing applications.
Tensile strength and elongation of the cured neat resin per ISO 527-2 and ASTM D638 — dog-bone specimens are cast and tested to determine the ultimate tensile strength, modulus, and percentage elongation, defining the cohesive properties of the adhesive polymer.
Peel resistance by T-peel and floating roller peel per ISO 4578 and ASTM D1876 — the force required to separate a flexible adherend from a rigid substrate is measured, quantifying the epoxy adhesive's resistance to peeling stresses in applications such as panel bonding and flexible circuit reinforcement.
Compressive strength and modulus per ISO 604 and ASTM D695 — the cured epoxy adhesive is compressed to failure to ensure adequate load-bearing capacity in anchoring, grouting, and under-machine levelling applications.
Flexural strength and modulus per ISO 178 and ASTM D790 — three-point bending of cast epoxy beams provides data on the adhesive's stiffness and ability to resist bending, essential for bonded structures subjected to flexural loads.
Fracture toughness and cleavage strength per ISO 13586 and ASTM D5045 — the critical stress intensity factor and strain energy release rate of the cured epoxy are measured to evaluate the adhesive's resistance to crack propagation, a critical parameter for impact-resistant and fatigue-loaded bonded joints.
Impact resistance by Charpy and Izod methods per ISO 179-1 and ASTM D256 — the energy absorbed during high-speed fracture is measured to ensure the cured epoxy adhesive can withstand accidental impacts and dynamic loading without brittle failure.
Creep and stress relaxation in shear and tension per ISO 899 and ASTM D2990 — the long-term deformation of bonded joints under sustained load is measured to predict the time-dependent behaviour of epoxy adhesives in structural applications over the design service life.

Thermal and Rheological Characterization Within Our Epoxy Resin Adhesive Testing Service

Glass transition temperature by differential scanning calorimetry per ISO 11357-2 and ASTM E1356 — the cured epoxy sample is heated at a controlled rate and the Tg is identified from the step change in heat flow, defining the maximum continuous service temperature for the bonded assembly.
Thermal stability and filler content by thermogravimetric analysis per ASTM E1131 and ISO 11358-1 — the mass loss profile up to 900 °C quantifies the organic binder content, carbon black, and inorganic filler fraction, verifying batch consistency and predicting decomposition temperatures.
Dynamic mechanical analysis for modulus and damping behaviour per ISO 6721-1 and ASTM D4065 — the storage modulus, loss modulus, and tan delta are measured across a temperature sweep, providing the viscoelastic fingerprint of the epoxy adhesive that governs energy dissipation and stiffness under dynamic service conditions.
Coefficient of thermal expansion by thermomechanical analysis per ISO 11359-2 and ASTM E831 — the linear expansion of the cured adhesive is measured to ensure compatibility with the adherends and to prevent interfacial stress from differential thermal movement.
Mixed viscosity, thixotropy, and pot life of the uncured adhesive per ISO 3219 and ASTM D2196 — rotational viscometry and thixotropic loop tests define the flow, sag resistance, and open time of the epoxy adhesive, guiding application method selection and workability under production conditions.
Gel time and cure exotherm per ASTM D2471 and internal protocols — the temperature rise and gelation point of the reacting epoxy system are recorded to confirm that the cure profile matches the supplier's recommendations and to prevent thermal runaway in large-scale castings.

Chemical Durability and Environmental Ageing Testing for Epoxy Resin Adhesives

Chemical immersion resistance in acids, alkalis, fuels, and solvents per ASTM D543 and ISO 175 — cured epoxy specimens are immersed in a range of aggressive fluids at defined temperatures, and the change in mass, hardness, and mechanical properties is measured to verify compatibility with the intended service environment.
Hydrolytic stability and hot water resistance per ASTM D3137 and ISO 2440 — the epoxy adhesive is immersed in water at temperatures up to 100 °C for extended periods, then the retained shear strength and Tg are retested to predict performance in humid, wet, and underwater bonding applications.
Neutral salt spray and cyclic corrosion resistance of bonded joints per ISO 9227 and ASTM B117 — bonded metal lap-shear specimens are exposed to continuous or cyclic salt fog for up to 2000 hours, and the residual strength and failure mode are evaluated to detect interfacial corrosion-induced adhesion loss.
Accelerated weathering by xenon-arc and fluorescent UV per ISO 4892-2 and ASTM G155 — the epoxy adhesive or coating is subjected to simulated sunlight, heat, and moisture to evaluate colour stability, surface chalking, and gloss retention for outdoor and architectural applications.
Resistance to hydraulic oils, lubricants, and de-icing fluids per ASTM D471 — the epoxy adhesive is tested with common industrial and transportation fluids to ensure that accidental spills or continuous contact do not plasticize or weaken the bonded joint.
High-temperature and thermal ageing in air per ASTM D573 and ISO 188 — the adhesive is aged at elevated temperatures and the retained lap shear strength and elongation are measured to predict the thermal endurance and to establish the maximum continuous service temperature rating.

Electrical and Insulation Testing Within Our Epoxy Resin Adhesive Testing Service

Dielectric strength and breakdown voltage per IEC 60243-1 and ASTM D149 — the cured epoxy adhesive film is subjected to an increasing AC or DC voltage until electrical failure, determining the dielectric strength in kV/mm required for insulation in transformers, bushings, and electronic packages.
Volume and surface resistivity per IEC 60093 and ASTM D257 — the electrical resistance through and across the cured epoxy is measured at 500 V DC to verify that the adhesive meets the insulation resistance specification for the intended electronic or high-voltage application.
Dielectric constant and dissipation factor per IEC 60250 and ASTM D150 — the relative permittivity and loss tangent are measured at specified frequencies to characterize the epoxy adhesive's behaviour as an insulator in high-frequency and signal integrity applications.
Comparative tracking index per IEC 60112 — the resistance of the cured epoxy surface to tracking under voltage and contamination is determined to ensure safety in creepage-critical printed circuit board and connector encapsulations.
Arc resistance per ASTM D495 — the ability of the epoxy adhesive to resist forming a conductive path under a high-voltage, low-current arc is measured for switchgear and high-voltage component insulation.

Flammability and Restricted Substance Compliance for Epoxy Resin Adhesives

UL 94 vertical and horizontal flame classification per ASTM D3801 and IEC 60695-11-10 — the cured epoxy is exposed to a defined flame and the afterflame time and burning rate are recorded to classify the material as V-0, V-1, V-2, or HB for electrical enclosure and consumer product applications.
RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, and polybrominated diphenyl ethers in the uncured and cured epoxy resin adhesive.
REACH Annex XVII and SVHC screening — analysis of Substances of Very High Concern including restricted amine hardeners, phthalate plasticizers, and short-chain chlorinated paraffins that may be present in the epoxy formulation.
Volatile organic compound content and odour per ASTM D6886 and ISO 11890-2 — the VOC content of the liquid epoxy adhesive is measured to ensure compliance with EU Solvent Emissions Directive and LEED requirements for low-emitting adhesives and sealants.
Migration and extractables for food and potable water contact per EU Regulation 10/2011 and BS 6920 — the cured epoxy is tested for overall migration into food simulants and for specific migration of restricted amines and bisphenol A to confirm suitability for indirect food contact and drinking water system applications.

Report Recognition and ISO/IEC 17025 Compliance

Every method described in this epoxy resin adhesive testing service is covered by our ISO/IEC 17025 scope of accreditation. Our test reports are accepted by European notified bodies for construction products and pressure equipment, by North American transportation and engineering authorities referencing ASTM and AASHTO standards, and by customs and regulatory agencies across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new structural adhesive formulation, a batch release inspection for an export shipment, or a root cause failure investigation of a bonded joint, our laboratory provides the measurement accuracy and technical expertise that the global adhesives and sealants industry demands.