Sealant testing service

Sealant Testing Service for Global Construction and Industrial Compliance

As an ISO/IEC 17025 accredited laboratory, we deliver a comprehensive sealant testing service that verifies the physical, mechanical, chemical, and long-term performance of joint sealants, construction adhesives, and weatherproofing compounds. Our sealant testing service supports manufacturers and exporters who must demonstrate conformity to ISO 11600, ASTM C920, EN 15651, and regional building and infrastructure standards across the European Union, North America, the Middle East, and Asia. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, building authorities, and procurement teams worldwide.

Product Samples We Regularly Test in Our Sealant Testing Service

Silicone sealants — for facade joints, sanitary applications, and structural glazing
Polyurethane sealants — for expansion joints, industrial flooring, and automotive sealing
Polysulfide and modified silicone sealants — for insulated glass units and high-movement construction joints
Acrylic and latex sealants — for interior cracks, coving, and low-movement painting applications
Butyl and rubber-based sealants — for waterproof membranes, window installation, and airtightness layers
Hybrid polymer and SMP sealants — for high-performance, low-VOC construction and assembly bonding
Firestop and intumescent sealants — for fire-rated penetrations, joints, and linear gap seals

Mechanical and Physical Performance Testing in Our Sealant Testing Service

Tensile strength, elongation at break, and modulus per ISO 8339 and ASTM C1135 — dumbbell specimens are pulled to failure to measure the ultimate tensile strength, elongation, and secant modulus, verifying the sealant can accommodate joint movement and structural stress without cohesive failure.
Joint movement capability and adhesion/cohesion under extension-compression cycling per ISO 9047 and ASTM C719 — the sealant is applied between standard substrates and subjected to repeated cyclic movement at defined temperatures and amplitudes, confirming the product maintains adhesion and watertightness at the rated movement class.
Hardness and indentation resistance per ISO 868 and ASTM D2240 — Shore A durometer measurements verify the cured sealant hardness meets the specification for flexible, medium, or rigid joints.
Tear resistance per ISO 34-1 and ASTM D624 — the force required to propagate a cut in the cured sealant is measured to ensure resistance to damage from sharp edges, tools, and joint movement.
Peel adhesion and bond strength to specific substrates per ASTM C794 and ISO 8510-2 — the force required to peel the sealant from glass, aluminum, concrete, or coated metal is measured to verify the primerless or primed adhesion performance on the specified building materials.
Compression set and recovery per ISO 815-1 and ASTM D395 — the cured sealant is compressed under constant deflection at elevated temperature, and the permanent deformation is recorded to predict the long-term ability to maintain a weathertight seal under compressive joint loads.

Adhesion, Cohesion, and Substrate Compatibility Testing

Adhesion in peel and tensile mode after water immersion and UV exposure per ISO 11600 and ASTM C794 — the sealant bond is tested after accelerated aging to verify it retains adhesion to porous and non-porous substrates under long-term outdoor exposure and water contact.
Compatibility with paints, coatings, and adjoining materials per ASTM C1087 and customer protocols — the sealant is applied to test panels and overcoated with specified paints, and any inhibition of cure, discoloration, or loss of adhesion is recorded to prevent field incompatibility.
Staining and migration testing on natural stone and porous substrates per ASTM C1248 — the sealant is tested on marble, limestone, and concrete to detect plasticizer migration, staining, or halo formation that would mar the building facade.
Primer performance and compatibility verification per ISO 11600 and customer specifications — the effectiveness of recommended primers is evaluated by applying the sealant with and without primer and comparing the adhesion and durability results.
Cohesive failure and interface failure analysis — the failure mode of tested specimens is documented and classified to guide formulation improvement and to ensure the sealant fails cohesively rather than adhesively in service.

Chemical Resistance and Environmental Durability Testing in Our Sealant Testing Service

Resistance to water, salt water, and cleaning agents per ISO 2812-1 and ASTM D471 — the cured sealant is immersed in water, salt solutions, and common cleaning chemicals, and the change in mass, hardness, and adhesion is measured to verify compatibility with building maintenance and marine environments.
Resistance to fuels, oils, and industrial chemicals per ASTM D543 and ISO 175 — for sealants used in industrial and automotive applications, the material is exposed to gasoline, diesel, hydraulic fluids, and solvents to confirm no swelling, softening, or dissolution occurs.
Accelerated weathering by xenon-arc and fluorescent UV exposure per ISO 4892-2 and ASTM G155 — the sealant is subjected to simulated sunlight, heat, and moisture cycles, and the color change, gloss loss, chalking, and retained mechanical properties are evaluated to predict outdoor service life.
Damp heat and condensation resistance per ISO 6270-2 and ASTM D2247 — the sealant is exposed to condensing humidity at elevated temperatures to verify no blistering, adhesion loss, or mold growth occurs in tropical and high-moisture building environments.
Ozone resistance per ISO 1431-1 — elastomeric sealants are exposed to ozone under strain and inspected for surface cracking, ensuring long-term durability in atmospheric and polluted urban environments.
Low-temperature flexibility and cold crack resistance per ASTM C793 and ISO 10590 — the cured sealant is bent or extended at sub-zero temperatures to confirm it remains flexible and does not crack during cold weather building movement.

Fire Performance and Firestop Sealant Testing in Our Sealant Testing Service

Fire resistance of firestop seals per EN 1366-4 and ASTM E814 — the firestop sealant is installed in a representative wall or floor penetration and exposed to the standard fire curve, measuring the integrity and insulation performance for the rated fire duration.
Reaction-to-fire classification per EN 13501-1 — the sealant is tested for ignitability, flame spread, and heat release using the single burning item test and the small flame test to generate the Euroclass classification for CE marking.
Surface burning characteristics per ASTM E84 — the flame spread index and smoke developed index are determined for the cured sealant, verifying Class A or Class B performance for North American building codes.
Smoke density and toxic gas emission per ISO 5659-2 — for sealants used in enclosed public spaces, the specific optical density of smoke and the concentration of toxic combustion gases are measured to support life safety assessments.
Glow-wire ignitability per IEC 60695-2-11 — the sealant is subjected to a glow-wire at defined temperatures to simulate contact with an overheated electrical component, verifying it does not ignite or self-sustain combustion.

Chemical Safety and Restricted Substance Compliance for Sealants

RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the sealant, pigments, and any additives to ensure the product meets global substance restrictions.
REACH Annex XVII and SVHC screening — targeted analysis of Substances of Very High Concern including specific phthalate plasticizers, organotin stabilizers, and restricted solvents that may be present in the sealant formulation.
Volatile organic compound content and emissions per ISO 11890-2 and ISO 16000-3 — the VOC content of the liquid sealant and the emission from the cured material are measured to ensure compliance with LEED, BREEAM, and indoor air quality regulations.
Formaldehyde emission per ISO 14184-1 and EN 16516 — chamber testing verifies that the sealant does not release harmful levels of formaldehyde into the indoor air of occupied buildings.
Heavy metals in packaging per EU Directive 94/62/EC — verification that the sum concentration of lead, cadmium, mercury, and hexavalent chromium in the packaging materials, cartridges, and labels is below the 100 ppm regulatory limit.
Migration testing for food contact and potable water applications per EU Regulation 10/2011 and BS 6920 — for sealants used in food processing areas or contact with drinking water, the migration of organic and inorganic substances is quantified to verify safety.

Report Recognition and ISO/IEC 17025 Compliance

Every test method described in this sealant testing service is covered by our ISO/IEC 17025 scope of accreditation. Our technical reports and certificates of analysis are accepted by European notified bodies for CE marking under the Construction Products Regulation, by North American building officials and specifiers referencing ASTM and AAMA standards, and by customs and procurement authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new sealant formulation, a batch release inspection for an export shipment, or a root cause failure analysis of a joint sealant failure, our laboratory provides the measurement accuracy and construction materials expertise that the global sealants and weatherproofing industry demands.