ARADUR 51

ARADUR 51 is a low-viscosity polyamine curing agent developed for ambient-temperature curing of compatible liquid epoxy resins.
ARADUR 51 combines high amine functionality with rapid reactivity, supporting the formation of hard, densely crosslinked thermoset networks.
ARADUR 51 is primarily associated with civil-engineering coating and construction applications requiring efficient wetting, short curing cycles, and reliable mechanical performance.

CAS Number: Mixture; no single CAS Number is assigned to the commercial product
EC Number: Mixture; no single EC Number is assigned to the commercial product
Molecular Formula: Not applicable to a proprietary polyamine mixture
Molecular Weight: Not applicable to a proprietary polyamine mixture

SYNONYMS

ARADUR 51, ARADUR® 51, Aradur 51 Polyamine, Aradur 51 Curing Agent, Aradur 51 Hardener, Aradur 51 Epoxy Hardener, Aradur 51 Epoxy Curing Agent, Huntsman Aradur 51, Huntsman ARADUR® 51, ARADUR 51 Polyamine Hardener, ARADUR 51 Amine Hardener, ARADUR 51 Liquid Hardener, ARADUR 51 Ambient-Cure Hardener, ARADUR 51 Room-Temperature Curing Agent, ARADUR 51 Epoxy Crosslinker, ARADUR 51 Epoxy Crosslinking Agent, ARADUR 51 Reactive Amine, ARADUR 51 Construction Hardener, ARADUR 51 Civil-Engineering Curing Agent, ARADUR 51 Coating Hardener, ARADUR 51 Flooring Hardener, ARADUR 51 Mortar Hardener, ARADUR 51 Resin Hardener, ARADUR 51 Polyfunctional Amine, ARADUR 51 Low-Viscosity Polyamine, ARADUR 51 Rapid-Cure Polyamine, ARADUR 51 Epoxy Resin Component B, ARADUR 51 Two-Component Epoxy Hardener, Polyamine Curing Agent 51, Polyamine Hardener 51, Epoxy Hardener 51, Epoxy Curing Agent 51, Amine-Based Epoxy Hardener 51, Liquid Polyamine Hardener 51, Construction Epoxy Hardener 51, Civil-Engineering Epoxy Hardener 51, Reactive Polyamine Curing Agent, Low-Viscosity Epoxy Curing Agent, Ambient-Temperature Epoxy Hardener, Room-Temperature Epoxy Crosslinker, Polyamine Epoxy Crosslinking Agent, Polyfunctional Amine Hardener, Epoxy Resin Amine Component, Thermoset Epoxy Hardener, Epoxide Ring-Opening Curing Agent, Amine-Functional Epoxy Curative

APPLICATIONS

ARADUR 51 serves as a reactive curing agent in two-component epoxy systems designed for civil-engineering coatings.
ARADUR 51 reacts with epoxide groups to form a three-dimensional thermoset network with durable mechanical characteristics.
ARADUR 51 supports ambient-temperature curing where externally heated processing would be impractical or uneconomical.
ARADUR 51 provides relatively fast gel development when combined with a compatible liquid epoxy resin at the correct stoichiometric ratio.

ARADUR 51 functions as the hardener component in epoxy floor-coating formulations applied to concrete and mineral substrates.
ARADUR 51 contributes to the development of hard, continuous films capable of withstanding routine pedestrian and equipment traffic.
ARADUR 51 facilitates the preparation of solvent-free flooring systems by combining low viscosity with high chemical reactivity.
ARADUR 51 enables formulators to obtain practical application viscosity without relying solely on large quantities of volatile solvent.

ARADUR 51 finds application in self-leveling epoxy floor systems intended for workshops, warehouses, utility areas, and technical rooms.
ARADUR 51 promotes efficient wetting of pigments, fillers, and mineral aggregates incorporated into flooring formulations.
ARADUR 51 supports smooth flow and surface leveling when the resin, filler loading, and rheology package are properly balanced.
ARADUR 51 offers rapid network formation that helps flooring systems progress from liquid application to functional solid surfaces.

ARADUR 51 serves as a curing component in high-build epoxy coatings applied to prepared concrete surfaces.
ARADUR 51 enhances the formation of thick protective layers with limited shrinkage when used in suitable high-solids systems.
ARADUR 51 contributes to cohesive film strength by forming chemical links between multifunctional epoxy molecules.
ARADUR 51 allows coating manufacturers to formulate robust barrier layers for demanding construction environments.

ARADUR 51 functions as a hardener in epoxy primers designed to improve adhesion between mineral substrates and subsequent resin layers.
ARADUR 51 supports penetration into porous concrete when viscosity, application temperature, and substrate condition are appropriately controlled.
ARADUR 51 promotes consolidation of weak surface regions by curing the penetrating epoxy phase within accessible pores.
ARADUR 51 provides a reactive base for primer systems intended to reduce substrate absorbency and improve overcoating consistency.

ARADUR 51 finds application in concrete-sealing formulations intended to reduce dusting and liquid penetration.
ARADUR 51 enables low-viscosity epoxy binders to wet prepared cementitious surfaces and develop an adherent protective film.
ARADUR 51 contributes to improved surface integrity by converting the liquid resin-hardener mixture into a crosslinked solid.
ARADUR 51 supports clear or pigmented sealers formulated for compatible dry and properly prepared mineral substrates.

ARADUR 51 serves as a curing agent in epoxy repair mortars used to restore damaged concrete edges, corners, and localized surface defects.
ARADUR 51 promotes strong binding between epoxy resin and graded mineral aggregates within repair compounds.
ARADUR 51 supports rapid strength development in repairs where prolonged shutdown periods are undesirable.
ARADUR 51 provides low initial viscosity that can assist aggregate wetting before the mortar reaches its working consistency.

ARADUR 51 functions as the reactive hardener in polymer-modified construction mortars based on epoxy binder technology.
ARADUR 51 contributes to compressive, tensile, and flexural performance by generating a tightly crosslinked binder phase.
ARADUR 51 facilitates the preparation of trowel-applied compounds for patching, profiling, and localized rebuilding.
ARADUR 51 enables mortar formulators to adjust flow, sag resistance, and aggregate loading through suitable fillers and rheological additives.

ARADUR 51 finds application in epoxy screeds used to create durable wearing layers over prepared concrete floors.
ARADUR 51 supports the incorporation of silica sand, quartz, and other clean dry aggregates into resin-rich binder systems.
ARADUR 51 promotes adhesion between the cured screed and a compatible primed substrate.
ARADUR 51 offers a reactive curing profile suited to construction projects requiring controlled but relatively rapid return to subsequent work stages.

ARADUR 51 serves as a hardener in epoxy grouting compounds used for filling stable gaps and transferring loads between compatible construction elements.
ARADUR 51 contributes to the formation of nonaqueous binder systems with low curing shrinkage compared with conventional drying materials.
ARADUR 51 supports the wetting of mineral fillers and aggregates used to control flow, exotherm, and dimensional behavior.
ARADUR 51 enables formulators to develop pourable or flowable grouts by adjusting resin viscosity and filler distribution.

ARADUR 51 functions as a curing component in anchoring and fixing compounds based on liquid epoxy resin.
ARADUR 51 promotes chemical crosslinking around clean reinforcing bars, threaded rods, bolts, and compatible inserts.
ARADUR 51 contributes to load transfer by producing a rigid adhesive matrix within properly prepared holes and cavities.
ARADUR 51 supports cartridge, bulk-mixed, or manually applied systems when the formulation and dispensing method are specifically engineered.

ARADUR 51 finds application in structural and semi-structural construction adhesives for bonding concrete, stone, ceramic, metal, and selected rigid materials.
ARADUR 51 enhances adhesive development through chemical curing rather than simple solvent evaporation.
ARADUR 51 supports gap-filling formulations containing thixotropic agents that limit sag on vertical surfaces.
ARADUR 51 provides a versatile amine-functional component for adhesives requiring strong interfacial contact and cohesive strength.

ARADUR 51 serves as a hardener in epoxy bonding bridges applied between existing concrete and freshly placed repair material.
ARADUR 51 contributes to adhesion by curing a continuous resin layer across the prepared interface.
ARADUR 51 supports wet-on-wet installation procedures when the complete system has been validated for the intended substrate and repair material.
ARADUR 51 enables construction formulations to maintain a reactive bonding surface during the specified application window.

ARADUR 51 functions as a curing agent in crack-repair compounds intended for stable, nonmoving cracks in concrete and masonry.
ARADUR 51 supports low-viscosity resin mixtures capable of entering accessible cracks under gravity, pressure, or assisted injection.
ARADUR 51 contributes to structural continuity by converting the injected liquid into a rigid crosslinked polymer.
ARADUR 51 allows formulators to modify penetration, gel time, and mechanical behavior through resin selection and compatible additives.

ARADUR 51 finds application in epoxy injection resins used for consolidating porous or fractured mineral substrates.
ARADUR 51 promotes curing throughout confined spaces when the components are mixed uniformly and moisture conditions are acceptable.
ARADUR 51 supports the development of low-viscosity injection systems because its own viscosity is comparatively low.
ARADUR 51 provides reactive amine hydrogen functionality capable of crosslinking standard liquid epoxy resins at ambient temperature.

ARADUR 51 serves as a curing component in joint-edge repair materials used around industrial floors and concrete slabs.
ARADUR 51 contributes to hard, wear-resistant polymer matrices that reinforce damaged edges after suitable preparation.
ARADUR 51 supports filled formulations designed to restore profiles before installation of compatible joint-sealing materials.
ARADUR 51 enables rapid progression through repair stages when temperature, batch size, and working time are properly controlled.

ARADUR 51 functions as a hardener in epoxy coving compounds used at wall-to-floor transitions in hygienic and industrial construction.
ARADUR 51 promotes adhesion to prepared vertical and horizontal mineral surfaces within a continuous resin system.
ARADUR 51 supports thixotropic mortar formulations that can be shaped without excessive slump.
ARADUR 51 contributes to seamless construction details by curing the binder around pigments, fillers, and graded aggregates.

ARADUR 51 finds application in protective epoxy linings for concrete sumps, channels, bunds, and secondary-containment structures.
ARADUR 51 supports the formation of continuous films that reduce direct contact between the substrate and service liquids.
ARADUR 51 contributes to coating integrity when chemical exposure, film thickness, cure schedule, and substrate moisture are properly evaluated.
ARADUR 51 allows formulators to combine resin, fillers, and reinforcing fabrics in multilayer protective systems.

ARADUR 51 serves as a curing agent in epoxy laminating compounds used with glass fabric or other compatible reinforcements for construction repairs.
ARADUR 51 promotes wetting of reinforcing fibers when the mixed-system viscosity remains within the required processing range.
ARADUR 51 supports the development of rigid composite patches, wraps, and locally reinforced surfaces.
ARADUR 51 provides ambient-cure reactivity that can simplify on-site application compared with heat-cured systems.

ARADUR 51 functions as a reactive binder component in epoxy terrazzo and decorative aggregate flooring systems.
ARADUR 51 contributes to secure encapsulation of colored mineral particles within the cured resin matrix.
ARADUR 51 facilitates grinding and finishing after the formulation has reached adequate hardness.
ARADUR 51 enables designers to combine decorative appearance with the durability associated with crosslinked epoxy binders.

ARADUR 51 finds application in pigmented epoxy coatings for plant rooms, corridors, service areas, and other concrete-floor environments.
ARADUR 51 supports uniform pigment and filler distribution through its low-viscosity contribution to the mixed binder.
ARADUR 51 promotes rapid development of a hard film while still requiring careful control of pot life and application rate.
ARADUR 51 provides formulators with a polyamine platform for coatings requiring practical room-temperature curing.

ARADUR 51 serves as a curing agent in nonslip flooring systems containing broadcast or premixed mineral aggregates.
ARADUR 51 contributes to secure retention of aggregate particles within the cured epoxy layer.
ARADUR 51 supports textured surfaces designed to improve traction in wet or contamination-prone areas.
ARADUR 51 enables subsequent seal coats to chemically and mechanically integrate with the underlying aggregate-filled layer when applied within the proper interval.

ARADUR 51 functions as a hardener in epoxy-based maintenance compounds used for localized rebuilding of mineral surfaces.
ARADUR 51 promotes rapid conversion of mixed material into a strong repair matrix at normal construction-site temperatures.
ARADUR 51 supports the incorporation of fibers, silica, pigments, and performance additives selected for the intended repair.
ARADUR 51 allows contractors to prepare workable batches provided the exothermic cure and approximately short gel time are carefully considered.

ARADUR 51 finds application in prefabricated epoxy repair elements and cast construction components produced from filled resin systems.
ARADUR 51 contributes to dimensional stability by forming a thermoset network that does not remelt after cure.
ARADUR 51 supports casting around inserts or reinforcement when entrapped air, exotherm, and shrinkage are adequately controlled.
ARADUR 51 provides low viscosity that assists mold filling before the progressing reaction increases system viscosity.

ARADUR 51 serves as a curing component in resin-rich construction compounds requiring strong adhesion and early hardness.
ARADUR 51 enhances cure efficiency through its comparatively high amine value and active-hydrogen functionality.
ARADUR 51 contributes to compact crosslink density when used at a ratio calculated from the epoxy equivalent weight of the selected resin.
ARADUR 51 provides a formulation basis for civil-engineering systems whose final suitability must be confirmed through application-specific testing.

DESCRIPTION

ARADUR 51 is a commercial polyamine curing agent supplied for use with compatible epoxy resins.
ARADUR 51 is expected to appear as a low-viscosity liquid with a light color consistent with its maximum Gardner color specification.
ARADUR 51 has a manufacturer-reported viscosity range of 20–40 mPa·s at 25°C.
ARADUR 51 therefore contributes substantially less viscosity than many modified or polymeric epoxy hardeners.

Structurally, ARADUR 51 is not represented by one defined molecular formula because it is supplied as a commercial polyamine product.
ARADUR 51 contains multiple reactive amine hydrogens capable of opening oxirane rings in liquid epoxy resins.
ARADUR 51 forms carbon–nitrogen and hydroxyl-containing linkages as the epoxy–amine polyaddition reaction proceeds.
ARADUR 51 ultimately converts the initially liquid resin-hardener mixture into an infusible three-dimensional thermoset network.

Chemically, ARADUR 51 displays a reported amine value of 440–480 mg KOH/g.
ARADUR 51 has a reported active-hydrogen equivalent range of approximately 67–90 g/eq.
ARADUR 51 must be proportioned according to the epoxy equivalent weight of the resin and the applicable active-hydrogen equivalent specification.
ARADUR 51 should not be assigned one universal mixing ratio without reference to the selected resin, fillers, modifiers, and current technical documentation.

ARADUR 51 exhibits relatively high ambient-temperature reactivity compared with many higher-molecular-weight epoxy hardeners.
ARADUR 51 produces a reported gel time of approximately 20 minutes when tested with ARALDITE GY 250 under the manufacturer’s reference conditions.
ARADUR 51 gel time can become considerably shorter as batch size, material temperature, ambient temperature, or accelerator concentration increases.
ARADUR 51 should therefore be mixed only in quantities that can be applied safely within the available working time.

ARADUR 51 is associated in the manufacturer’s selector guide with civil-engineering applications.
ARADUR 51 is particularly compatible with formulation concepts involving coatings, flooring binders, repair mortars, grouts, and construction adhesives.
ARADUR 51 performance depends on the complete epoxy system rather than on the curing agent alone.
ARADUR 51 should consequently be evaluated with the exact resin, pigment, filler, aggregate, additive, and substrate combination intended for production.

ARADUR 51 may be incorporated into unfilled, pigmented, mineral-filled, or aggregate-filled epoxy systems.
ARADUR 51 low viscosity assists mixing and wetting but does not eliminate the need for controlled mechanical dispersion.
ARADUR 51 must be blended thoroughly with the resin because local stoichiometric imbalance can leave soft, tacky, or undercured regions.
ARADUR 51 should be mixed using equipment and speeds that achieve uniformity without entraining excessive air.

ARADUR 51 reacts exothermically with epoxy resins as crosslinking progresses.
ARADUR 51 mixed in large masses can generate substantially more heat and cure more rapidly than the same formulation spread as a thin film.
ARADUR 51 pot life should therefore be evaluated using realistic batch volumes and application geometries.
ARADUR 51 mixtures should never be left in deep containers after mixing when uncontrolled heat buildup could occur.

ARADUR 51 curing behavior is influenced by temperature, humidity, substrate condition, film thickness, stoichiometry, and resin functionality.
ARADUR 51 may cure slowly or incompletely at temperatures below the validated application range.
ARADUR 51 may react too rapidly at elevated temperatures, reducing working time and increasing the risk of surface defects or excessive exotherm.
ARADUR 51 formulations should be conditioned and applied within the temperature range established during laboratory and field trials.

ARADUR 51, like many reactive amine hardeners, can absorb moisture and carbon dioxide from prolonged exposure to air.
ARADUR 51 atmospheric exposure may contribute to surface carbonation, amine blush, haze, or inconsistent curing in sensitive formulations.
ARADUR 51 containers should therefore remain tightly closed when the material is not being sampled or transferred.
ARADUR 51 storage and handling systems should minimize contact with humid air and reactive atmospheric contaminants.

ARADUR 51 compatibility with water, alcohols, hydrocarbons, and other formulation liquids cannot be assumed from its polyamine classification alone.
ARADUR 51 may react with acids, acid chlorides, isocyanates, oxidizing agents, and other chemically active substances.
ARADUR 51 should be introduced into solvent-containing formulations only after confirming chemical compatibility, flash characteristics, and cure performance.
ARADUR 51 should never be diluted with an unidentified solvent or process liquid.

ARADUR 51 is manufactured as a proprietary commercial product whose exact component composition is not represented by a single CAS Number.
ARADUR 51 manufacturing details and compositional limits are controlled by the producer and the applicable product specification.
ARADUR 51 quality is commonly assessed through viscosity, amine value, active-hydrogen equivalent, gel time, and color.
ARADUR 51 incoming batches should be checked against the current certificate of analysis before use in controlled production.

ARADUR 51 cured performance may include hardness, adhesion, strength, abrasion resistance, and chemical resistance, but these properties belong to the complete epoxy formulation.
ARADUR 51 alone should not be assigned fixed tensile, compressive, thermal, or chemical-resistance values.
ARADUR 51 formulation testing should include pot life, cure progression, surface condition, adhesion, mechanical performance, and relevant service exposures.
ARADUR 51 current technical and safety documentation should take priority over generalized product descriptions.

PROPERTIES

Product Name: ARADUR 51
Registered Trade Name: ARADUR® 51
Manufacturer or Brand Owner: Huntsman Advanced Materials
Product Type: Reactive epoxy curing agent
Chemical Family: Polyamine
Product Function: Hardener and crosslinking agent for epoxy resins
Primary Application Classification: Civil engineering
Physical Form: Low-viscosity liquid
Typical Appearance: Clear to pale-colored liquid
Color: Maximum 3 Gardner
Viscosity at 25°C: 20–40 mPa·s
Amine Value: 440–480 mg KOH/g
Active-Hydrogen Equivalent: Approximately 67–90 g/eq
Reference Gel Time: Approximately 20 minutes
Reference Gel-Time Resin: ARALDITE GY 250
Reference Gel-Time Temperature: 23°C
Reference Gel-Time Method: TECAM reference test; confirm the current producer procedure
Solids Content: Reactive product; consult the current technical specification
CAS Number: Not assigned as one number to the commercial mixture
EC Number: Not assigned as one number to the commercial mixture
Molecular Formula: Not applicable
Molecular Weight: Not applicable
Mixing Ratio: Calculate from the resin epoxy equivalent weight and the current ARADUR 51 active-hydrogen equivalent
Cure Mechanism: Epoxy–amine polyaddition
Curing Behavior: Ambient-temperature reactive
Reaction with Epoxy Resin: Exothermic
Cured Material Type: Crosslinked thermoset polymer
Water Solubility: Product-specific; consult the current Safety Data Sheet
Density: Not confirmed in the available manufacturer selector guide
Flash Point: Not confirmed in the available manufacturer selector guide
Vapor Pressure: Not confirmed in the available manufacturer selector guide
pH: Not an appropriate standalone specification for the undiluted product unless defined by the supplier
Chemical Stability: Stable when stored and handled according to the current supplier instructions
Hazardous Polymerization: Not expected when stored separately from epoxy resins and incompatible reactants
Incompatible Materials: Acids, strong oxidizing agents, isocyanates, acid chlorides, and other strongly reactive chemicals
Moisture Sensitivity: Protect from prolonged exposure to humid air
Carbon-Dioxide Sensitivity: Protect from prolonged atmospheric exposure that may promote amine carbonation
Hazard Classification: Refer to the current regional ARADUR 51 Safety Data Sheet
Transport Classification: Refer to the current regional ARADUR 51 Safety Data Sheet
Shelf Life: Refer to the unopened-package shelf life stated by the current supplier
Recommended Storage: Tightly closed original containers in a cool, dry, well-ventilated location

The manufacturer selector guide reports ARADUR 51 as a polyamine with a viscosity of 20–40 mPa·s, an amine value of 440–480 mg KOH/g, an active-hydrogen equivalent of approximately 67–90 g/eq, a reference gel time of approximately 20 minutes, and a maximum color of 3 Gardner.

FIRST AID

Inhalation:
Move the affected person immediately to fresh air.
Keep the person at rest in a position comfortable for breathing.
Avoid further exposure to ARADUR 51 vapor, aerosol, mist, or heated fumes.
Provide trained respiratory assistance if breathing becomes difficult or stops.
Obtain immediate medical attention if respiratory irritation, coughing, dizziness, or breathing difficulty occurs.

Skin Contact:
Remove contaminated clothing, footwear, watches, and other articles immediately.
Rinse the affected skin promptly with plenty of clean water.
Wash the skin thoroughly with soap and water after the initial rinsing.
Continue decontamination because reactive polyamine hardeners may cause severe irritation or chemical burns.
Obtain immediate medical attention if pain, redness, blistering, or persistent irritation develops.
Wash contaminated clothing thoroughly before reuse or dispose of it safely.

Eye Contact:
Rinse the eyes immediately with plenty of clean, gently flowing water.
Hold the eyelids open to ensure complete irrigation of the eye surface.
Remove contact lenses when present and easy to do, then continue rinsing.
Continue rinsing for at least 15 minutes or for the period directed by medical personnel.
Obtain immediate specialist medical attention because amine curing agents may cause serious eye injury.

Ingestion:
Rinse the mouth thoroughly with water.
Do not induce vomiting unless specifically directed by qualified medical personnel.
Never give anything by mouth to an unconscious or convulsing person.
Keep the affected person at rest and obtain immediate medical attention.
Provide the product label and current ARADUR 51 Safety Data Sheet to medical personnel.

Note to Physicians:
No product-specific antidote is identified in the publicly available selector information.
Provide supportive care and treat according to the patient’s symptoms and clinical condition.
Assess the eyes, skin, respiratory tract, mouth, and gastrointestinal tract for possible corrosive or irritant injury.
Consider delayed respiratory effects following significant inhalation exposure.
Use the current regional ARADUR 51 Safety Data Sheet as the primary medical reference.

HANDLING AND STORAGE

Handling:
Handle ARADUR 51 only after reviewing the current supplier Safety Data Sheet.
Avoid all unnecessary contact with the skin, eyes, and clothing.
Do not breathe vapor, aerosol, mist, or fumes generated during heating or processing.
Use closed transfer and metering systems wherever reasonably practicable.
Prevent contamination with epoxy resin until controlled mixing is intended.
Mix only quantities that can be used within the validated working time.
Avoid large mixed masses because the epoxy–amine reaction can generate substantial heat.
Wash the hands, face, and exposed skin thoroughly after handling.
Do not eat, drink, or smoke in areas where ARADUR 51 is stored or processed.
Keep containers tightly closed when the material is not being transferred or sampled.

Ventilation:
Provide effective general ventilation throughout storage, mixing, and application areas.
Use local exhaust ventilation at drum openings, pumps, filling points, mixers, reactors, and sampling stations.
Control vapor and aerosol emissions at their source rather than allowing them to spread through the workplace.
Provide additional ventilation when ARADUR 51 is heated, sprayed, mechanically agitated, or applied in confined spaces.
Use suitable respiratory protection when engineering controls cannot adequately limit exposure.
Select respiratory equipment through a documented workplace risk assessment.
Ensure that exhausted air is discharged in accordance with environmental and occupational requirements.

Storage:
Store ARADUR 51 in the original, tightly closed, and correctly labeled container.
Keep the product in a cool, dry, and well-ventilated location.
Protect ARADUR 51 from moisture, humid air, direct sunlight, excessive heat, and physical damage.
Keep ARADUR 51 separated from epoxy resins until controlled formulation or application.
Store ARADUR 51 away from acids, strong oxidizing agents, isocyanates, acid chlorides, and incompatible chemicals.
Prevent water, dirt, rust, resin, and other contaminants from entering opened containers.
Carefully reseal partially used containers immediately after sampling or transfer.
Use first-in, first-out stock rotation within the supplier’s stated shelf life.
Maintain the storage-temperature range specified in the current technical and safety documentation.

Spill and Leak Procedures:
Restrict access to the affected area and remove unnecessary personnel.
Provide effective ventilation before beginning spill recovery.
Wear suitable chemical-resistant gloves, protective clothing, eye protection, and respiratory protection as required.
Stop the leak only when this can be done without personal risk.
Prevent ARADUR 51 from entering drains, sewers, soil, groundwater, or surface water.
Contain free liquid with sand, earth, vermiculite, or another compatible inert absorbent.
Do not use reactive acidic absorbents or materials of unknown compatibility.
Collect recovered liquid and contaminated absorbent in correctly labeled chemical-waste containers.
Clean the affected surface using a method approved in the current Safety Data Sheet.
Dispose of all residues through an authorized waste-management contractor.
Report significant environmental releases in accordance with applicable regulations.

Handling Precautions:
Wear chemical-resistant gloves selected from documented permeation and compatibility data.
Use tightly fitting chemical goggles during routine transfer, mixing, and application.
Wear a face shield in addition to goggles where splashing is reasonably foreseeable.
Use protective clothing, sleeves, and footwear capable of preventing direct liquid contact.
Provide accessible emergency eyewash and safety-shower equipment near handling areas.
Inspect hoses, seals, pumps, valves, and transfer connections before use.
Use clean and dry equipment dedicated to compatible amine-curing-agent service.
Never seal a container containing a reacting epoxy and ARADUR 51 mixture unless the equipment is specifically designed for the resulting heat and pressure.
Prevent uncontrolled mixing with acids or oxidizing agents.
Review the current ARADUR 51 Technical Data Sheet, Safety Data Sheet, and certificate of analysis before production, transport, storage, application, or disposal.