| Epoxy | Two-part epoxy resin and curing agent; one-part heat-cured systems are also available. | Mixing nozzle, metered dispensing, bead application, or film bonding. One-part grades may require oven curing. | Approximately -40°C to 150°C; specialized grades may operate outside this range. | Metals, ceramics, glass, rigid plastics, composites, and electronic components. | High shear strength, strong chemical resistance, low shrinkage, excellent gap filling, and good electrical insulation. | Two-part products require accurate mixing; many grades have limited flexibility and relatively long cure times. | Structural metal bonding, automotive components, electrical potting, electronics assembly, tooling, and composite parts. |
| Polyurethane (PU) | Moisture-curing or two-component polyurethane prepolymers and curing systems. | Manual or automated bead dispensing, spray application, laminating, or two-component metering. | Approximately -40°C to 120°C; high-temperature grades may provide higher resistance. | Metals, wood, rubber, plastics, foams, textiles, glass, and composite panels. | High flexibility, good impact resistance, strong adhesion to many porous materials, and effective vibration damping. | Moisture-sensitive processing for some grades; heat resistance is generally lower than that of many epoxies and silicones. | Automotive interiors, sandwich panels, furniture, footwear, wind-energy components, construction, and transportation equipment. |
| Acrylic | Reactive acrylic or methacrylate polymers, including structural two-part methyl methacrylate systems and pressure-sensitive acrylics. | Direct dispensing, dual-cartridge application, coating, laminating, or roll-to-roll coating. | Approximately -40°C to 120°C; actual performance depends on formulation and exposure conditions. | Metals, coated surfaces, plastics, glass, composites, and painted substrates. | Fast development of handling strength, good weathering and UV resistance, strong bonding to many plastics, and good durability. | Some formulations have strong odor or volatile components; surface preparation and formulation compatibility are important. | Automotive trim, signage, electronics, displays, appliance assembly, composite bonding, and pressure-sensitive tapes. |
| Silicone | Room-temperature-vulcanizing silicone, including acetoxy, oxime, alkoxy, and neutral-cure systems. | Cartridge dispensing, automated bead application, screen printing, coating, or encapsulation. | Approximately -60°C to 200°C; specialized grades may withstand higher intermittent temperatures. | Glass, metals, ceramics, plastics, painted surfaces, and electronic assemblies, depending on grade. | Excellent flexibility, wide temperature range, weathering resistance, UV stability, moisture resistance, and low-stress sealing. | Lower structural strength than many epoxies; some cure by-products can corrode sensitive metals or affect electronics. | Sealing, glazing, lighting, appliances, solar modules, electronics protection, automotive gasketing, and construction joints. |
| Hot Melt | Thermoplastic polymers such as EVA, polyolefin, polyester, polyamide, or reactive polyurethane hot melt. | Heated nozzle, roller coating, slot-die coating, spray application, or automated bead dispensing. | Approximately -30°C to 120°C; reactive polyurethane hot melts can provide higher performance after moisture curing. | Paper, cardboard, textiles, wood, plastics, foams, metals, and packaging films. | Fast setting, solvent-free processing, high production speed, easy automation, and no drying oven for conventional grades. | Application requires heated equipment; conventional grades may soften at elevated temperatures and can have limited open time. | Packaging, bookbinding, hygiene products, woodworking, furniture edging, footwear, labels, filtration, and product assembly. |