On a high-volume line, a sealing material that needs minutes of oven time or a long moisture cure becomes the bottleneck. Incure Uni-Seal 6322 is a light-curable form-in-place and cure-in-place gasket material designed to seal electronic and automotive housings at the pace of automated production.
The Case for Light-Cured Gaskets
Traditional gasketing forces a choice between slow-curing liquid sealants and the inventory and fit problems of die-cut parts. A UV, visible, or LED light-curable FIPG or CIPG material removes that trade-off. The bead is dispensed exactly where it is needed, then cured on demand in seconds as the part passes a lamp, so throughput is set by line speed rather than by chemistry.
What Uni-Seal 6322 Offers
- Acid-free formulation that will not corrode copper, solder, or fine-pitch conductors
- Low viscosity for precise dispensing into narrow channels and around tight corners
- Fast cure with low-energy LED lamps, suited to inline and conveyorized processes
- High resilience and memory retention, so the gasket recovers after compression cycles better than many cut elastomers
- Air-tight sealing against moisture, dust, and pressure differentials
- Moisture, temperature, and chemical resistance for under-hood and outdoor service
- Dual use as a temporary mask during conformal coating
Building the Process Around It
Bead and groove design. Give the dispensed bead a defined cross-section and a target compression of roughly 20 to 40 percent when the housing closes. Consistent geometry is what makes the seal repeatable unit to unit.
Dispensing. A positive-displacement dispense head keeps bead volume constant as the material warms or the reservoir drains. Programmed paths hold the bead centered on the flange through corners and changes in direction.
Curing. Size the lamp to the largest part so the entire bead reaches full cure in one pass. For long or complex flange paths, an inline conveyor curing system or a correctly matched UV LED flood lamp keeps cure time in step with takt.
A cured gasket and a metal or plastic housing expand at different rates, so a seal that is fine at room temperature can loosen in the cold or over-compress when hot. Weighing how thermal expansion mismatch stresses a sealed joint guides the choice between a firmer and a more compliant grade.
For help matching Uni-Seal 6322 to a dispense cell and cure station, Email Us with your cycle-time targets and housing geometry.
Production Benefits
Switching to a light-cured poured gasket typically shortens cycle time, cuts gasket inventory and scrap, reduces rework by forming the seal in one controlled step, and gives engineering the freedom to revise flange geometry without new tooling. The same material can seal a control-unit housing on one line and mask a board for coating on another.
Resilience and Compression Set
A gasket’s job is to keep sealing after it has been compressed, warmed, cooled, and vibrated for years. The property that describes this is compression set: how much permanent deformation remains after the load is removed. A material with high compression set gradually loses its sealing force and the joint starts to leak, even though nothing visibly failed.
Uni-Seal 6322 is formulated for high resilience and memory retention, recovering its shape after compression cycles better than many cut elastomers. In a bolted enclosure that is opened and reclosed for service, or one that breathes with daily temperature swings, that recovery is what maintains the seal over the product’s life.
Integrating Into an Automated Cell
A light-cured gasket process has three linked stations: dispense, close or stage, and cure. Balancing them is what protects takt time. The dispense head must lay a consistent bead at line speed, the cure lamp must deliver full dose in the time the part spends under it, and the material’s fixture-free handling window has to be long enough to move the part between stations without disturbing the bead. Sizing the lamp to the largest part and confirming cure at the thickest bead cross-section prevents the cure station from becoming the constraint.
Typical Applications
Uni-Seal 6322 seals printed circuit assembly enclosures, automotive connector and module housings, lighting and power-supply cases, and industrial equipment housings that face vibration and washdown, wherever high volume and a reliable environmental seal have to coexist.
Frequently Asked Questions
Q: Why choose a light-cured gasket over a two-part liquid silicone?
A: A two-part silicone cures on its own clock, often tens of minutes, so the part cannot be closed or moved until it sets. A light-curable material cures in seconds when the bead passes a lamp, so throughput is set by line speed rather than by chemistry.
Q: What causes a poured gasket to leak over time?
A: The usual cause is compression set, the permanent loss of bead height under sustained load and temperature cycling. A high-resilience formulation recovers its shape and maintains sealing force far longer.
Work With Incure
Incure formulates acid-free, fast-curing FIPG and CIPG materials and helps customers integrate them into automated dispense and cure lines. Contact Our Team to discuss your production requirements and request a sample.
Visit www.incurelab.com for more information.