Types of Adhesives: Complete Guide with Examples
Understanding different adhesive types helps you choose the right product for your project. This guide covers all major adhesive categories.
Classification by Chemistry
1. Epoxy Adhesives
Two-part systems that cure through chemical reaction. Excellent strength, chemical resistance, and durability.
Best for: Metal, plastic, composites, structural applications
2. Cyanoacrylate (Super Glue)
Single-component adhesives that cure rapidly in presence of moisture. Fast-setting, high-strength bonds.
Best for: Small parts, quick repairs, compatible plastics and metals
3. Polyurethane Adhesives
Flexible, durable bonds with good gap-filling properties. Resistant to moisture and temperature extremes.
Best for: Construction, automotive, flexible materials
4. Acrylic Adhesives
Fast-curing, high-strength adhesives. Available in one-part and two-part formulations.
Best for: Metals, plastics, high-performance applications
5. Silicone Adhesives
Flexible, weather-resistant bonds. Excellent for sealing and bonding in harsh environments.
Best for: Glass, metal, outdoor applications, sealing
Classification by Form
Liquid Adhesives
Traditional liquid glues applied with brush, applicator, or squeeze bottle.
Paste Adhesives
Thick, gap-filling adhesives for uneven surfaces.
Film Adhesives
Pre-formed adhesive sheets for precise application.
Pressure-Sensitive Adhesives
Tapes and labels that bond with pressure.
Classification by Curing Method
- Evaporative: Water or solvent-based (PVA, contact cement)
- Reactive: Chemical curing (epoxy, polyurethane)
- Hot Melt: Thermoplastic adhesives
- UV Curing: Light-activated adhesives
Specialty Adhesives
- Medical adhesives
- Food-safe adhesives
- High-temperature adhesives
- Conductive adhesives
Choosing the Right Type
Consider:
- Materials being bonded
- Strength requirements
- Environmental conditions
- Application method
- Cure time
Conclusion
Understanding adhesive types helps you select the right product for optimal bonding results. Each type has specific advantages for different applications.