| 1 | Epoxy Adhesive | Epoxy resin with amine, anhydride, or other curing agents | Chemical cross-linking after mixing one- or two-component systems | Room temperature to heat cure; handling time may range from minutes to several hours | Metals, ceramics, glass, wood, composites, and selected plastics | High bond strength, good gap filling, good chemical and temperature resistance | Often rigid; mixing ratio and surface preparation are critical; some grades have limited peel resistance | Structural assembly, electronics, machinery, automotive parts, and composite bonding | Mix ratio, viscosity, working life, Tg, shear and peel strength, thermal cycling, and storage stability |
| 2 | Polyurethane Adhesive | Isocyanate-based polyurethane, usually one- or two-component | Moisture reaction or reaction between polyol and isocyanate components | Moisture-assisted room-temperature cure or accelerated heat cure | Metals, plastics, rubber, wood, textiles, foams, and composites | Flexible, impact-resistant, good vibration absorption, and suitable for dissimilar materials | Moisture and temperature affect cure; some formulations have lower high-temperature resistance than epoxies | Automotive interiors, footwear, furniture, panels, construction, and flexible assemblies | Open time, moisture tolerance, hardness, elongation, VOC or isocyanate requirements, and hydrolysis resistance |
| 3 | Cyanoacrylate Adhesive | Alkyl cyanoacrylate monomers | Rapid anionic polymerization initiated by surface moisture | Usually seconds to minutes at room temperature; activators can accelerate bonding | Many metals, rubber, plastics, ceramics, and small wood components | Very fast fixture time, low application volume, and easy single-component use | Brittle in some joints, limited gap filling, lower resistance to prolonged heat, moisture, and peel loads | Small components, electronics, consumer products, rubber bonding, and repair work | Viscosity, fixture time, blooming, shock resistance, humidity aging, and compatibility with plastics |
| 4 | Anaerobic Adhesive | Dimethacrylate-based reactive resin with initiators | Cures in the absence of oxygen and in contact with active metal ions | Room-temperature cure; cure speed depends on gap, metal type, and activator | Threaded metal parts, close-fitting cylindrical metal components, and flanges | Thread locking, sealing, and retaining in one process; good resistance to vibration and leakage | Generally unsuitable for large gaps, porous surfaces, and many non-metallic substrates without activator | Thread locking, pipe sealing, bearing retention, and flange sealing | Breakaway and prevailing torque, cure on inactive metals, temperature range, chemical resistance, and gap capability |
| 5 | Structural Acrylic / MMA Adhesive | Methyl methacrylate or related acrylic reactive systems | Free-radical polymerization, commonly activated by mixing two components | Rapid room-temperature cure, commonly with adjustable working time | Metals, composites, many plastics, and painted or lightly prepared surfaces | High strength, good impact resistance, strong bonding to many low-surface-energy plastics, and limited surface preparation | Strong odor in some grades, exothermic cure, limited repositioning after mixing, and possible substrate sensitivity | Transportation, composite panels, plastic assemblies, marine structures, and metal fabrication | Mixing ratio, working time, exotherm, odor and emissions, lap shear, impact resistance, and surface compatibility |
| 6 | Silicone Adhesive / Sealant | Silicone polymers, including acetoxy, neutral, and addition-cure systems | Moisture-cure or two-component addition-cure cross-linking | Skin formation in minutes; full cure commonly requires additional time and moisture diffusion | Glass, ceramics, metals, selected plastics, painted surfaces, and construction materials | Excellent flexibility, weathering and UV resistance, wide service-temperature capability, and reliable sealing | Lower structural strength than many rigid adhesives; surface contamination and primer selection can be important | Glazing, lighting, electronics protection, construction joints, appliances, and outdoor assemblies | Neutral versus acetoxy cure, modulus, adhesion after aging, primer needs, outgassing, and movement capability |
| 7 | UV / Visible-Light-Curing Adhesive | Acrylate, epoxy, or hybrid photopolymer systems with photoinitiators | Polymerization triggered by specified UV or visible light wavelengths | Seconds to minutes under suitable light intensity, wavelength, and exposure time | Glass, transparent plastics, metals, and electronic components where light can reach the bond line | Fast on-demand curing, clean processing, excellent positioning, and no mixing for one-component grades | Shadowed areas may remain uncured unless a dual-cure formulation is used; requires compatible equipment | Optical parts, displays, glass assemblies, electronics, medical devices, and small precision components | Wavelength match, light intensity, depth of cure, shadow-cure performance, yellowing, and equipment compatibility |
| 8 | Reactive Polyurethane Hot Melt | Moisture-reactive polyurethane prepolymer | Initial physical setting by cooling followed by moisture-induced chemical cross-linking | Applied hot, commonly around 80–140°C depending on formulation; final cure occurs over time | Wood, textiles, foams, plastics, metals, and coated materials | Fast handling, no solvent carrier, flexible bonds, and good long-term resistance after full cure | Requires heated equipment; moisture control, application temperature, and open time must be managed | Edgebanding, bookbinding, automotive interiors, textiles, footwear, and panel lamination | Application temperature, open time, green strength, final cure rate, packaging moisture protection, and equipment cleaning |
| 9 | Phenolic Adhesive | Phenol-formaldehyde or related thermosetting resin systems | Heat-activated condensation and cross-linking, often under pressure | Typically elevated-temperature press curing; exact conditions depend on resin and assembly | Wood veneers, engineered wood, friction materials, metals, and heat-resistant composites | Good heat resistance, durability, creep resistance, and performance in demanding structural applications | Requires heat and pressure; generally dark-colored; formaldehyde emissions and regulatory compliance require attention | Plywood, laminated wood, brake and friction materials, insulation, and high-temperature composites | Emission class, press-cycle requirements, resin solids, durability testing, color, and applicable environmental regulations |
| 10 | MS Polymer / SMP Adhesive | Moisture-curing silane-modified polyether or polyurethane polymers | Moisture-induced hydrolysis and cross-linking of silane end groups | Room-temperature moisture cure; cure rate depends on humidity, temperature, and joint thickness | Metals, glass, ceramics, wood, concrete, coated surfaces, and many plastics | Flexible bonding and sealing, low odor options, good weathering resistance, and broad substrate compatibility | Slower deep cure than some two-component systems; very low-energy plastics may require treatment or primer | Construction, transportation, solar equipment, industrial panels, appliances, and general assembly | Surface energy, primer requirements, modulus, movement capability, skin time, emissions, and resistance to water and chemicals |
