Epoxy

Ultra-High Temperature Epoxy: Incure Epo-Weld™ UHTE-5322

A high-temperature adhesive is only useful on the production floor if you can actually apply it. Incure Epo-Weld™ UHTE-5322 pairs a wide service range with a room-temperature cure, so shops without an oven can still bond and pot parts that will run hot. What sets UHTE-5322 apart Epo-Weld™ UHTE-5322 is a two-part epoxy that holds performance across a range of roughly -60°C to 300°C (-76°F to 572°F) and works for both bonding and potting. Its defining feature within the Ultra High Temperature family is that it cures at ambient temperature. Most epoxies rated for this kind of heat need an oven cure to reach full properties; UHTE-5322 reaches a usable cure on the bench, which simplifies the process for repair work, large assemblies that will not fit in an oven, and heat-sensitive components nearby. The cured system resists a wide set of solvents, fuels, and dilute acids and bases, and it develops strong tensile and flexural strength. Key properties and what they mean Wide thermal range. The same grade covers cold-soak conditions and sustained heat, which matters for equipment that cycles between the two, such as transport hardware and outdoor industrial installations. Room-temperature cure. No oven means lower energy cost, no fixture bake-out, and no risk of thermally damaging adjacent parts. An optional mild heat cure still speeds the schedule and lifts the final glass transition temperature if you want it. Bonding and potting in one product. You can use a single qualified material for both structural joints and encapsulation, which cuts down on inventory and qualification work. Chemical resistance. The matrix holds up to cleaning chemistry and process fluids over long exposure. Where UHTE-5322 fits Aerospace and defense: potting connectors and bonding brackets on assemblies too large or heat-sensitive for an oven cure. Automotive and transportation: encapsulating sensors and bonding hardware in engine-bay and exhaust-adjacent locations. Electronics in hot environments: potting power components and control modules that run near their thermal limits. Industrial ovens and dryers: bonding instrumentation and support hardware during on-site maintenance. Rail and transit systems: field repairs on traction and braking equipment where an oven is not available. Bonding and potting practice For potting, pour in thin passes and let each pass release trapped air before adding more; a deep single pour tends to hold voids and can exotherm if the mass is large. For bonding, control the bond line to roughly 0.1 to 0.25 mm and design the joint for shear loading. When you bond or pot around ceramics, glass, or dissimilar metals, plan for thermal expansion differences; the stress that builds at every temperature change is a leading cause of bond-line cracking, as explained in this guide to how CTE mismatch causes adhesive bond failure. If you are potting a module and are not sure how the exotherm will behave in your pour volume, Email Us with the cavity dimensions and fill depth. Surface preparation Degrease every substrate with a clean solvent, abrade metals to expose fresh material, then wipe again and let the…

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August 12, 2024
Epoxy

Incure Epo-Weld™ UHTE-5321: Ultra-High Temperature Epoxy Adhesive

Two-part high-temperature epoxies bring metering error, mixing voids, and pot-life pressure to every job. Incure Epo-Weld™ UHTE-5321 removes all three by delivering ultra-high temperature performance in a single-component form. What UHTE-5321 is Epo-Weld™ UHTE-5321 is a one-part contact epoxy rated for continuous service across roughly -60°C to 320°C (-76°F to 608°F). Because it is pre-mixed, there is no ratio to get wrong, no mixing step to trap air, and no working-life clock running the moment you open the container. It is used for both bonding and potting where components must survive sustained heat and aggressive chemistry. As a contact adhesive, it is applied to the mating surfaces, brought together, and then cured with heat. The cured film resists a broad range of solvents, fuels, and dilute acids and bases, and it delivers high tensile strength. Key properties and why they matter One-part convenience. Eliminating mixing removes the most common source of field bond failures: off-ratio or poorly mixed adhesive that cures soft. It also makes automated and repetitive dispensing far more consistent. Very wide thermal range. UHTE-5321 covers cold-soak conditions and some of the highest continuous temperatures available from an epoxy, so a single qualified material can serve equipment that cycles hard between extremes. Chemical resistance. The cured matrix stands up to process fluids, fuels, and cleaning chemistry over long exposure. Bonding and potting versatility. The same product handles structural joints and encapsulation. Where UHTE-5321 fits Aerospace and defense: bonding heat-shield hardware and potting connectors near propulsion systems. Industrial furnaces, kilns, and ovens: securing thermocouples, insulators, and fixtures inside heated enclosures. Semiconductor and electronics processing: bonding and potting components in deposition, annealing, and test equipment. Power generation: mounting sensor housings and support hardware on turbines, boilers, and exhaust ducting. Chemical processing: bonding and repairing equipment exposed to hot, aggressive fluids. Application and cure Because UHTE-5321 is a heat-cure contact adhesive, the process is different from a room-temperature two-part epoxy: Prepare both surfaces (see below) and apply a thin, even coat to each. Allow any carrier solvent to flash off per the datasheet, then bring the parts together with firm, even pressure. Fixture the assembly and run the specified heat-cure ramp and hold. The temperature resistance of the finished bond depends on completing this cure fully. Step the oven temperature up gradually rather than placing parts straight into a hot oven, which reduces thermal shock to fixtures and prevents volatiles from blistering the film. If your assembly cannot tolerate the full cure temperature, Email Us and we can review whether a lower-temperature grade will meet your service requirements. Surface preparation Metals: solvent degrease, abrade to fresh material, then a final solvent wipe and full dry. Ceramics: clean and lightly abrade, remove all dust, and warm the part briefly to drive off absorbed moisture. Bond promptly after preparation and keep surfaces free of skin oils and shop debris. Designing the joint Keep the bond line thin and uniform, and load the adhesive in shear rather than peel or cleavage. When bonding dissimilar…

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August 12, 2024
Putty

Incure Epo-Weld™ High-Temperature Epoxy Gasket Seal for Extreme Heat

When a boiler door, a furnace access panel, or a molten-metal launder needs a gasket, rubber and cork are out of the question. Sealing surfaces that run above 1,000°C calls for a formed-in-place ceramic gel that stays sealed through every heat-up and cooldown cycle. The problem with conventional gaskets at high temperature Elastomeric and fiber gaskets rely on compression set: they are squeezed between two flanges and their recovery force keeps the joint tight. That mechanism collapses at high temperature. Organic binders in sheet gaskets burn out, leaving a loose ash; ceramic fiber ropes relax and shrink; and every heat cycle widens the gap as the flanges distort. The result is a joint that leaks combustion gas, radiant heat, or process fumes within a handful of cycles. Incure's Epo-Weld™ high-temperature gasket compound is a one-part ceramic gel filled with reinforcing fibers. It is applied wet directly to the sealing face, then the joint is closed so the material takes the exact shape of both surfaces. On cure it forms a dense, slightly resilient ceramic seal rated for continuous service to roughly 1,300°C (2,400°F). Because it is formed in place, it fills machining marks, minor warpage, and pitting that a cut gasket would bridge over and leak past. What the compound is The gel is thick enough to stay where it is placed on a vertical face and does not slump before the joint is assembled. It is single-component, so there is no mixing, and it bonds lightly to steel and cast iron so it stays put during assembly. Once cured it resists most process chemicals, combustion products, and mild acids and alkalis, which makes it suitable for equipment where the seal sees both heat and corrosive exposure. Where it fits Boiler and furnace doors, peep sights, and access hatches Ductwork and expansion-joint flanges on hot-gas systems Molten-metal handling equipment, launders, and ladle covers Blowers, compressors, and steam valve bonnets on high-temperature service Manifolds, heat exchangers, and oven panel joints For selecting protective materials by peak temperature and base metal, Incure's guide to ceramic coatings by substrate and service temperature is a useful companion. Application Clean both flange faces to bare metal and remove all old gasket residue, oil, and scale. Lay a continuous bead of gel inside the bolt circle, slightly proud of the final joint thickness, and close the joint immediately while the material is still wet. Torque the fasteners in a cross pattern to the equipment manufacturer's specification so the gel is compressed evenly and squeezes out to a thin, uniform line. Wipe the excess before it skins. Allow the assembly to air-dry for 24 hours. The seal then develops full ceramic strength through the first heat-up. Where possible, bring the equipment to operating temperature in stages rather than a single fast ramp, holding near 100°C and again near 250°C to let residual water escape as vapor without pressurizing the joint. A joint that is heated too quickly can bubble or crack along the bead. Thermal cycling and…

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August 10, 2024