Cure temperature is one of the first questions asked about one-part epoxy — and the answer is more nuanced than the single number that appears in most product summaries. The temperature that activates the chemistry, the temperature that produces full cure within a practical time window, and the temperature that maximizes final properties are three different things, and understanding the relationship between them is what allows process engineers to build a cure cycle that actually fits their production constraints. The Activation Threshold vs. the Recommended Cure Temperature One-part epoxy contains a latent hardener that becomes chemically active above a certain temperature. Below that threshold, the material is stable and does not cure meaningfully. Above it, the reaction begins. The activation threshold and the recommended cure temperature are not the same number. Recommended cure temperatures — typically printed prominently in technical data sheets as the standard condition — are chosen by formulators to deliver full cure within a practical time window, usually 30 to 90 minutes. For most standard one-part epoxy systems, this lands between 120°C and 180°C depending on the hardener chemistry. The activation threshold may be considerably lower — some systems begin advancing at 80°C or even lower — but reaching that threshold does not mean the cure will complete in a reasonable time. The practical implication is that cure temperature and cure time are coupled. A material that cures in 30 minutes at 150°C may achieve equivalent crosslink density in 3 to 4 hours at 100°C. Whether that extended-time, lower-temperature option is useful depends on whether the process can accommodate the longer cycle and whether the assembly can tolerate the temperature. Low-Temperature Cure Formulations Not all one-part epoxy formulations require temperatures above 120°C. Specialty low-temperature cure formulations are designed with catalyst systems that activate in the 80°C to 100°C range. These were developed for applications where assemblies include heat-sensitive components — certain plastics, pre-applied coatings, adhesives already in the assembly — that cannot tolerate standard cure temperatures. Low-temperature cure formulations trade some final property performance for the reduced temperature requirement. Glass transition temperature of the cured material is typically lower, continuous service temperature rating is reduced, and chemical resistance may be somewhat lower than a standard high-temperature cure grade. For applications where service conditions are moderate — ambient temperatures, low chemical exposure, light structural loads — this tradeoff is acceptable. For demanding structural or high-temperature service applications, low-temperature cure grades may not provide adequate performance. If you're evaluating low-temperature cure options for a specific assembly with thermal constraints, Email Us — Incure can help identify which formulations fit your temperature window while meeting your performance requirements. Cure Temperature and Final Glass Transition Temperature The glass transition temperature (Tg) of the cured material is directly influenced by the cure temperature. Curing below the target Tg produces an incompletely crosslinked network with a Tg lower than the formulation's potential. Curing at or above the target Tg allows the reaction to approach completion, producing a fully crosslinked network with the specified…

Reject rate in PCB potting operations is rarely attributed to the adhesive chemistry — it's usually framed as a dispensing problem, a cure problem, or a component compatibility problem. But when those problems are traced back to their source, a significant portion originate in the mixing step: off-ratio material that cures soft, incomplete mixing that leaves tack spots, viscosity drift across the pot life window that produces bead inconsistency. One-part epoxy doesn't solve every potting defect, but it eliminates an entire category of root causes, and the impact on reject rate is measurable. The Reject Mechanisms That Two-Part Mixing Introduces In a two-part potting operation, the mixing step is where a disproportionate share of defects originate. Meter-mix ratio drift — a pump component wearing, a viscosity shift in one component from temperature change, a filter restricting flow — produces material that cures with reduced hardness, residual tack, or visible phase separation. Visual inspection catches obvious failures; subtle off-ratio batches may pass initial inspection and fail later in functional testing or environmental conditioning. Incomplete mixing from a clogged or worn static mixer produces unmixed pockets that cure as soft, uncrosslinked zones. These zones are not structurally capable, not electrically insulating, and not moisture-resistant — they represent bond-line failures that are invisible until the assembly is sectioned or fails in service. Viscosity drift over pot life creates a moving target for dispense parameters. A dispense program optimized for material at the start of the pot life window may overfill or underfill as the viscosity increases toward the end of that window. Reject rates from fill volume outside specification often have this root cause. One-Part Epoxy's Impact on Each Mechanism One-part epoxy eliminates the mixing step entirely. The material leaves the factory pre-formulated with the correct chemistry already combined. There is no ratio to drift, no mixer to fail, and no pot life window within which the material is advancing toward gelation. The immediate consequence for reject rate is the removal of all mix-ratio-related defects. Soft cure failures, tack-surface failures, and phase-separation failures that trace back to incorrect mix ratio drop to zero as a cause category. This is not an incremental improvement in ratio accuracy; it's a complete elimination of the failure mode. Viscosity at the point of dispense is determined by formulation and temperature, both of which can be controlled and held stable across a production shift. There is no within-shift viscosity drift from pot life advancement. A dispense program qualified in the morning produces the same bead geometry at end of shift, which means fill volume defects from viscosity drift are similarly eliminated as a root cause. If your PCB potting line is running a reject rate above 1% and you want to investigate whether mix-ratio root causes are contributing, Email Us — Incure can help with root cause analysis and evaluate whether a one-part system addresses the failure modes you're seeing. Cure Consistency Across the Production Shift One-part epoxy cure is triggered by temperature, and cure cycle conditions can…

Aerospace assembly operates under constraints that most industrial manufacturing never encounters. Bond strength must be consistent not just batch to batch, but part to part within a batch, and across production runs separated by months or years. Documentation must trace every material lot to every assembly. Processes must be qualified and must remain qualified through personnel changes, facility moves, and supply chain transitions. In this environment, any process variable that introduces inconsistency is a problem — and two-part epoxy mixing is one of the most persistent sources of adhesive process variability in the industry. One-part epoxy removes that variable by design. Why Process Consistency Is a Safety Issue in Aerospace In most manufacturing contexts, bond strength variability is a quality problem that results in rework and scrap. In aerospace, it can be a safety issue. Structural adhesive bonds in flight control surfaces, airframe panels, brackets, and electronic enclosures are subject to fatigue loading, thermal cycling, and vibration profiles that are characterized and validated during aircraft certification. That validation assumes the adhesive performs to specification — which assumes consistent bond quality across every assembly. Mix ratio errors in two-part systems, incomplete mixing due to nozzle channeling, and ratio drift in meter-mix dispensers all produce bonds with properties that deviate from the characterized specification. The deviation may be small enough to pass inspection and still be large enough to affect fatigue life or environmental resistance over the aircraft's service life. One-part epoxy's pre-formulated, pre-mixed chemistry eliminates this source of variability at its root. Latent-Cure Chemistry and Batch Stability The stability of one-part epoxy at room temperature is particularly valuable in aerospace production environments where assembly queues are common and process intervals are variable. A structural adhesive applied to a subassembly may sit at room temperature for hours or days before the final cure oven cycle — due to production scheduling, inspection holds, or assembly sequencing. In that interval, the bond quality is determined solely by how well the adhesive maintains its properties before activation. Latent-cure one-part epoxy systems are specifically designed for this stability. The curative is chemically inert at room temperature and does not begin advancing the cure until the activation temperature is reached. This means a part bonded and held at room temperature for 24 hours before oven cure will produce the same bond quality as a part cured immediately after bonding — provided the material has been stored and handled correctly. For aerospace production planners, this flexibility in pre-cure hold time is a meaningful scheduling advantage. Assembly sequences don't need to be synchronized tightly to the cure oven; bonded assemblies can queue without degradation. If your facility is evaluating one-part epoxy for a structural aerospace application and needs support with process characterization, Email Us — Incure's engineering team has experience working through the technical requirements of aerospace adhesive qualification. Qualification and Certification Implications Introducing a new adhesive in aerospace assembly typically requires process qualification under the applicable specification — whether that's an OEM process specification, a NADCAP requirement, or…

The appeal of a room-temperature cure adhesive is obvious: no oven, no thermal equipment, no cure cycle waiting time. The bond forms at ambient conditions, and the assembly moves forward. For many applications, this is perfectly adequate. But for structural applications — where the bond must carry load, survive thermal cycling, resist chemical exposure, and remain reliable across the service life of the product — the chemistry that results from a room-temperature cure is fundamentally different from what a heat-activated system produces. That difference has consequences that show up in testing and in the field. What Heat Does to the Polymer Network The physical properties of a cured epoxy are a direct function of how completely and how densely the polymer network has crosslinked. Crosslink density — the number of chemical connections between polymer chains per unit volume — determines stiffness, strength, thermal resistance, and chemical resistance. Higher crosslink density produces a harder, stronger, more thermally stable, and more chemically resistant material. Room-temperature cure epoxies are formulated with reactive hardeners that work at ambient conditions. The cure proceeds through a slower reaction at lower energy, and it typically does not go to completion at room temperature — some reactive groups remain unreacted in the final network. The result is a partially crosslinked matrix with properties constrained by this incompleteness. Heat-cure epoxy uses latent curatives that activate at elevated temperature and react at high efficiency. The higher thermal energy drives the reaction further toward completion, producing a more fully crosslinked network with superior properties. A heat-cure system cured at 150°C for 60 minutes is not just "more cured" than a room-temperature system — it's a qualitatively different material with higher performance across nearly every structural metric. Mechanical Strength Under Load Lap shear strength, tensile adhesion, and peel resistance are all higher in heat-cured epoxy systems compared to room-temperature equivalents formulated from the same base resin. Published data for structural heat-cure epoxy grades typically shows lap shear values on steel in the 25 to 45 MPa range; comparable room-temperature grades in the same product families generally fall in the 15 to 25 MPa range. For assemblies operating under sustained mechanical load, creep resistance is equally important as peak strength. Room-temperature cured epoxies, with their lower crosslink density, are more susceptible to creep — gradual deformation under sustained stress — than heat-cured systems. In structural joints carrying static or cyclic loads, this difference determines whether the bond maintains dimensional integrity over the product's service life. Service Temperature Range Tg, the glass transition temperature, is the inflection point at which a cured polymer shifts from a glassy, rigid state to a softer, viscoelastic behavior. Above Tg, stiffness and strength drop sharply, and structural loads can no longer be reliably transferred through the bond. Heat-cured epoxy systems routinely achieve Tg values above 120°C and, with specialty formulations, above 200°C. Room-temperature cure systems typically have Tg values in the 50°C to 80°C range, sometimes lower. For applications operating in environments above 80°C — automotive under-hood, industrial…

Automated dispensing turns adhesive application into a repeatable machine process — but only if the adhesive's physical behavior is understood and controlled. One-part epoxy performs exceptionally well in automated dispensing systems, but getting that performance requires aligning three interrelated variables: the material's viscosity at the point of dispensing, the temperature conditions across the dispenser and line, and the speeds at which the system is expected to run. Getting these right during process setup pays off in consistent bead geometry, minimal rework, and dispensing equipment that runs without constant adjustment. Viscosity as the Central Process Variable Viscosity governs everything about how an adhesive flows through a dispensing system and deposits on a substrate. Too high, and the material resists flow through fine tips, requires excessive pressure, and may not wet out properly on the substrate. Too low, and the bead spreads beyond the target area, slumps on vertical surfaces, and may bleed under components before cure. One-part epoxy formulations span a wide viscosity range — from under 1,000 mPa·s for low-viscosity underfill grades to over 100,000 mPa·s for thixotropic paste formulations designed for gap-filling or dam applications. Selecting a formulation with a viscosity appropriate to the needle gauge, dispense pressure, and target bead geometry is the first step in process setup. Viscosity is not static. Like most polymers, epoxy viscosity decreases with increasing temperature. A formulation specified at 25,000 mPa·s at room temperature may drop to 8,000 mPa·s at 40°C. This temperature sensitivity is a tool — deliberate warming of the dispensing reservoir allows fine-tuning of flow characteristics without changing the formulation. Temperature Control at the Dispenser Temperature-controlled dispensing systems — reservoir heaters, syringe barrel heaters, heated valves — are standard accessories for automated epoxy dispensing, and they're worth using even when not strictly required. Controlling the material temperature at the dispenser stabilizes viscosity across shifts, reduces the effect of ambient temperature variation between morning startup and afternoon steady-state production, and allows the process to be set once and held reliably. For one-part epoxy, the upper limit of dispenser heating is constrained by the cure activation temperature. If the material is warmed too aggressively — particularly in a large-volume reservoir — low-level advancement can begin before the material reaches the substrate. In practice, reservoir temperatures below 50°C are well within safe range for most formulations; operating temperature recommendations are provided in the manufacturer's technical data sheet. Syringe-level heating is more common than reservoir heating for cartridge-format dispensing. Small syringe heaters apply gentle, even warming to reduce viscosity without risk of bulk advancement. This approach gives the process engineer precise control over material temperature at the dispense point with minimal risk. If you're setting up a temperature-controlled dispensing process for a new formulation and want guidance on safe operating temperatures and target viscosity ranges, Email Us — Incure can provide application-specific recommendations. Tip Selection and Needle Gauge Needle gauge selection follows directly from viscosity. Standard dispensing guidelines recommend matching inner diameter to viscosity: lower-viscosity materials can be dispensed through finer gauges (23…

A one-part epoxy formulated for excellent adhesion to aluminum will fail on that same aluminum if the surface isn't prepared correctly. The adhesive can't compensate for contamination, oxidation, or surface energy too low for chemical bonding. Surface preparation is not a refinement step that improves good bonds into great ones — it's the prerequisite that determines whether a bond forms at all. Understanding what each substrate needs before the adhesive is applied is where bond reliability is actually built. Why Surface Preparation Matters Adhesive bonding depends on intimate contact between the adhesive and the substrate at a molecular level. Contaminants — oils, release agents, oxides, moisture, dust — occupy the surface and prevent that contact. Even at film thicknesses too thin to see, a hydrocarbon oil film on a metal surface will displace an epoxy adhesive from the substrate, leaving the bond at the interface of epoxy and contamination rather than epoxy and metal. The joint may pass initial pull testing with acceptable numbers, but will fail early under environmental exposure, thermal cycling, or sustained load. Surface energy is the other key variable. Adhesives wet and spread on surfaces with surface energy higher than the adhesive's surface tension. Low-surface-energy substrates — untreated polyolefins, PTFE, silicone — repel adhesives rather than allowing them to spread and make molecular contact. Treating these surfaces to raise their surface energy is not optional; it's the mechanism by which adhesion becomes possible. Metal Substrates: Aluminum, Steel, Copper, and Titanium Metals are generally higher surface energy materials, which should favor adhesion — but their tendency to oxidize and their affinity for hydrocarbons from handling and processing make cleaning essential. The baseline process for metals is solvent cleaning to remove oils and processing residues. Isopropyl alcohol (IPA) is adequate for light contamination; for heavier soils from stamping, drawing, or machining, a more aggressive solvent or alkaline cleaner may be needed. Solvent cleaning should always progress from contaminated to clean — a single wipe in one direction, then a fresh wipe, until the wipe comes back clean. For aluminum, the native oxide layer is stable but relatively weak. For structural bonds, mechanical abrasion (fine grit sandpaper or abrasive pad) followed by solvent cleaning produces a more consistent bondable surface than cleaning alone. Conversion coatings — chromate or phosphate for aluminum, phosphate for steel — provide a more durable surface preparation that bonds well to epoxy and resists undercutting by moisture at the interface over time. Copper oxidizes rapidly, and the cuprous oxide layer that forms is not a good bonding surface. Copper surfaces should be cleaned and bonded quickly, or treated with a surface treatment that stabilizes the surface chemistry. For electronics assembly, OSP (organic solderability preservative) coatings can affect adhesion and should be evaluated before production qualification. If you're developing a surface preparation specification for a new substrate combination and want technical support, Email Us — Incure can help with adhesion testing and surface treatment recommendations. Plastics and Composites Plastics vary widely in surface energy and therefore…

Small-batch production exposes the worst side of two-part epoxy. When you're running 20 assemblies instead of 2,000, you can't time your production to consume every mixed cartridge before it gels — and the math rarely works out evenly. The result is discarded material, wasted mixing nozzles, and the constant low-level friction of working around a chemistry that's racing against itself. One-part epoxy was not designed specifically for small-batch environments, but it fits them exceptionally well precisely because it eliminates the pressure that makes two-part systems so difficult to manage at low volumes. The Pot Life Problem, Defined Pot life is the time between mixing and the point at which the adhesive's viscosity has increased enough to make it unusable for dispensing. For two-part epoxy, this window starts the moment resin and hardener contact each other — regardless of whether the material has been dispensed yet. A cartridge in the dispenser, with the mixing nozzle attached, is advancing toward its pot life limit from the moment mixing starts. In high-volume production, this isn't a serious constraint. Lines are designed to consume full cartridges within the working time, and changeovers are planned accordingly. In small-batch production — prototype runs, custom assemblies, repair operations, low-volume specialty products — the batch size rarely consumes a full cartridge in one session. The leftover material can't be saved; it has to be discarded along with the mixing nozzle, which is now full of curing adhesive and unusable. Across a production week, this adds up. Material cost, nozzle cost, and the friction of mid-session cartridge changes because the previous nozzle gelled before the run finished — these are real operational costs that rarely appear in standard cost accounting but show up in actual spending. One-Part Epoxy Has No Working-Time Pressure One-part epoxy contains no active hardener at room temperature. The latent curative is present but dormant, waiting for thermal activation. There is nothing in the material's chemistry that is advancing toward gelation at room temperature — and therefore no pressure to use the material within any particular window. A syringe of one-part epoxy opened at the start of a work shift can be capped and returned to the refrigerator after the run is complete. The next day, or the next week, that same syringe can be warmed, uncapped, and used again — with the same dispense behavior, the same cure response, and the same bond performance as the session before. No material is wasted because the shift ended before the batch was done. No nozzle needs replacing because the adhesive cured overnight. For small-batch environments where production schedules are irregular and batch sizes vary, this flexibility is not a minor convenience — it's a structural change in how the adhesive behaves in the workflow. If your operation runs irregular production schedules and you're looking at how adhesive selection affects material cost and process friction, Email Us — Incure's team can review your current system and model the practical impact of switching to a single-component approach. Managing Out…

Adhesive waste in manufacturing is rarely measured as a line item — it gets absorbed into material cost, absorbed into scrap rates, absorbed into the time spent cleaning equipment and changing out mixed-material cartridges. When it finally gets measured, the numbers are often surprising. One-part epoxy in cartridge format directly addresses several of the mechanisms that generate this waste, and for assembly operations looking to tighten material utilization, the shift in dispensing format is worth a structured evaluation. Where Waste Originates in Two-Part Epoxy Operations Two-part epoxy waste has three primary sources. The first is pot life discard: mixed material that isn't used before the working time expires must be thrown away, along with the mixing nozzle and any material in the static mixer. In high-cadence operations this can be a small fraction of total consumption; in lower-volume or intermittent production, it becomes a significant loss. The second source is nozzle purge waste. Every time a two-part dispensing system starts up or restarts after a pause, a purge shot must be dispensed to clear the mixer and confirm correct ratio before production dispensing begins. Depending on the system and formulation, this purge volume can be non-trivial — particularly on larger-format cartridges. The third source is material left in the cartridge. Dual-cartridge two-part systems rarely empty both chambers at exactly the same rate; the dispensing mechanism terminates when one side runs out, leaving residual material in the other chamber that cannot be used. End-of-cartridge losses accumulate across a production week. How One-Part Cartridge Systems Reduce Each Loss Category One-part epoxy in syringe or cartridge format eliminates pot life discard entirely. Because there's no mixed material in the system, there's no expiring reaction driving urgency. Material dispensed into the syringe but not used in a given session can be capped, returned to refrigerated storage, and used in a subsequent session — provided the out-time specification hasn't been exceeded. This is simply not possible with mixed two-part material. Startup waste is reduced to the small amount needed to verify tip wetting and bead consistency. There's no ratio check purge, no static mixer to clear, and no concern about unmixed pockets at the start of the bead. For high-value assemblies where every dispense event matters, this reduction in required purge volume translates directly to material savings. End-of-cartridge loss is also minimized. Single-component cartridges and syringes have one chamber, and the dispensing mechanism can advance the piston to within a small fraction of total volume. Material utilization rates above 95% are achievable on standard syringe formats, compared to the lower utilization typical of dual-cartridge two-part systems. If you're running a material consumption audit and want to model the waste reduction potential of switching to one-part epoxy cartridges, Email Us — Incure can help build out the comparison for your specific formulation and volume. Cartridge and Syringe Formats Available One-part epoxy is available in several cartridge formats to match dispensing equipment and production volume. Standard luer-lock syringes in sizes from 3 cc to 55 cc are…

Adhesive procurement decisions rarely account for what happens between delivery and the production line — but with one-part epoxy, storage conditions determine whether the material performs as specified or arrives at the dispenser already compromised. Procurement teams that understand the shelf life mechanics of single-component epoxy can write smarter purchase orders, avoid waste, and prevent quality failures that trace back to the receiving dock rather than the assembly floor. Why One-Part Epoxy Has a Shelf Life at All One-part epoxy contains all the chemistry needed for curing in a single package — resin and latent hardener together. The hardener is designed to remain inactive at room temperature and activate only when the material reaches the cure temperature. In practice, this suppression isn't perfect. At ambient temperatures, there's a slow, low-level reaction occurring at all times. The material is advancing toward its cured state, just very slowly. Shelf life is the manufacturer's specified period during which the material will still cure correctly and meet its performance specifications. Beyond that date, the material may have advanced enough that cure is incomplete, bond strength is reduced, or viscosity has drifted outside the dispensing specification. The shelf life is not a cliff — material doesn't instantly fail on day one after expiration — but it's a meaningful engineering limit backed by characterization data, and using it beyond that window introduces process risk. Standard Storage Requirements Most one-part epoxy formulations are specified for refrigerated storage at 0°C to 10°C (32°F to 50°F). At refrigerator temperature, the low-level advancement reaction slows significantly, extending usable shelf life to 6 to 12 months for standard formulations. Some specialty formulations require freezer storage at or below -20°C (-4°F) for shelf lives up to 12 months; others are stable at ambient temperature for 3 to 6 months if kept cool and away from heat sources. The specific storage requirement varies by formulation and should be confirmed on the product technical data sheet rather than assumed from general category knowledge. A procurement team ordering a new formulation should verify storage class, minimum and maximum storage temperature, and whether the material requires any conditioning steps — such as warming to room temperature before opening — to prevent condensation on the material surface. Thaw and Conditioning Before Use Refrigerated one-part epoxy should be allowed to equilibrate to room temperature before the container is opened. If a cold container is opened immediately, moisture from the ambient air will condense on the material surface, introducing water into the formulation. Depending on the formulation, this can affect cure behavior, adhesion, and the final mechanical and electrical properties of the bond. Typical equilibration times run 1 to 4 hours depending on container size and ambient temperature. Manufacturers specify the recommended warm-up time on the technical data sheet. Once the material has reached room temperature and the container is opened, the out-of-refrigerator clock starts — most formulations specify a maximum room-temperature working life after opening (often called "out time") ranging from a few hours to several days. For…

Single-component epoxies solve the mixing problem, but they don't all cure the same way — and the cure mechanism you choose shapes everything from equipment requirements to throughput to how your assembly must be designed. Heat-cure and UV-cure one-part epoxies both deliver strong, reliable bonds without the variability of two-part mixing, but each activates under fundamentally different conditions. Making the right selection up front prevents an expensive process redesign downstream. What Drives the Cure in Each System Heat-cure one-part epoxies contain a latent hardener — typically a solid curative that becomes reactive above a threshold temperature. At room temperature, the material is stable for months when stored correctly. When the assembly enters an oven and reaches the activation temperature, typically between 120°C and 180°C, the hardener dissolves into the resin and crosslinking proceeds. The bond builds strength over the duration of the cure cycle, which usually runs 30 to 90 minutes depending on the formulation and temperature. UV-cure one-part epoxies use a photoinitiator that generates reactive species when exposed to ultraviolet light — generally in the 320 to 400 nm range. Cure begins immediately on UV exposure and reaches handling strength within seconds to minutes, depending on intensity and depth of exposure. The reaction stops where UV light cannot reach, which is a fundamental geometric constraint that shapes where this chemistry can and cannot be used. Geometric Access and Shadow Cure The single largest factor in choosing between these two chemistries is whether UV light can reach the entire bond line. If any portion of the adhesive joint is shadowed by a component, a housing wall, or an opaque substrate, UV cure will be incomplete in that area. The result is an undertreated bond with compromised mechanical and environmental performance. Heat-cure epoxy has no such constraint. Thermal energy penetrates through substrates, around components, and into geometrically complex cavities. As long as the assembly reaches the cure temperature throughout, the adhesive cures uniformly regardless of joint access or substrate opacity. For bonding beneath surface-mounted components, inside enclosed housings, or in any configuration where line-of-sight to the adhesive is limited, heat cure is the appropriate choice. UV cure is well-suited to transparent or translucent substrates — glass, clear plastics, quartz — where the UV beam passes through to the bond line. It's also effective for exposed surface applications: tacking components in place, sealing perimeter bonds visible from above, and applications where the adhesive joint is fully accessible to the UV source. Cure Speed and Throughput UV cure is significantly faster in terms of time-to-handling-strength. Seconds of UV exposure can produce a bond strong enough to continue assembly. This speed advantage is real and significant for applications where cycle time is the governing constraint and joint geometry permits UV access. Heat cure requires oven time — typically 30 minutes or more. However, the throughput calculation is not always straightforward. Batch ovens and conveyor tunnel ovens can process many assemblies simultaneously, and the per-unit cure time in a loaded oven is a function of…