When a bond needs to fill a gap, pot around components, or join substrates a tape cannot reach, a liquid adhesive is the answer. The main families differ in how they cure and what they bond best — pick by substrate, gap, cure speed and the strength and temperature the joint must hold.
PUR reactive hot-melt
Moisture-cure polyurethane hot-melts grab fast then cure to a strong, slightly flexible bond with good drop and ageing resistance — widely used to bond smartphone housings, cameras and precision structural parts.
Epoxy — one- and two-component
Epoxies deliver the highest structural strength and chemical resistance. One-component epoxies cure with heat for consistent, high-performance bonds; two-component epoxies cure at room temperature for field and low-heat assembly.
UV light-curing
UV adhesives stay liquid until exposed to UV light, then cure in seconds — perfect for fast fixturing, positioning and reinforcement. UV/moisture dual-cure grades also harden in shadowed areas the light cannot reach.
Silicone, MS and MMA
Silicone and modified-silane (MS) adhesives stay flexible and seal across a wide temperature range. MMA two-component acrylates bond fast to metals and many plastics with high strength and good gap-fill, tolerating less-prepared surfaces.
Choosing in practice
- Match the adhesive to BOTH substrates and the gap.
- Pick the cure (heat, moisture, UV, room-temp) that fits your process.
- Confirm strength, flexibility and service temperature targets.
- Check open time / fixture time against your takt time.
Greenevo Synergy supplies a full liquid-adhesive range — PUR, epoxy, UV, silicone/MS, MMA and potting compounds — and our technical team will help you specify and validate the right one.