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Suppliers: Adhesives and Sealants
Dymax
Light-Curable Electronics Coatings, Assembly Adhesives & Conformal Coating Masking Materials
Silver Partner
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Adhesives, Sealants & Glues for Drone & Unmanned System Manufacturing
Adhesives, sealants, and glues are foundational to the structural and functional integrity of unmanned systems. As UAV platforms grow more compact and lightweight, traditional fasteners and gaskets are often replaced or supplemented by bonding and sealing materials that distribute stress more evenly, reduce component weight, and enhance environmental protection.
The move toward integrated systems and multi-material construction, combining metals, composites, polymers, and sensitive electronics, demands bonding and sealing solutions that accommodate thermal expansion, mechanical shock, and electromagnetic interference. Adhesives and sealants not only enable these complex assemblies but also often improve their performance and service life.
These materials also support key manufacturing goals such as modularity, repairability, and automation. Many UAV designs incorporate bonded joints for speed and repeatability in high-volume production. In contrast, others depend on potting compounds, encapsulants, and conformal coatings to shield components from vibration and moisture over extended deployments.
Adhesives Used in Drone Manufacturing
Epoxy Adhesives
Fast-Curing Optical Epoxy Adhesive by Dymax
Epoxy adhesives are two-part systems that cure to form high-strength, rigid bonds. They provide excellent adhesion to metals, composites, and engineering plastics, and are highly resistant to chemicals, heat, and environmental degradation.
Applications for epoxy adhesives:
- Bonding composite airframe panels
- Mounting battery housings
- Attaching metal brackets
- Securing high-stress mechanical joints
- PCB staking and reinforcement
These adhesives are often selected for critical structural connections in drone fuselages and motor mounts, where mechanical integrity over time is essential. Their strength and resistance to fuel, solvents, and heat make them particularly useful in rugged or industrial UAV designs.
Cyanoacrylate Adhesives
Cyanoacrylates are fast-setting, single-component adhesives known for their ability to bond a wide range of substrates with minimal surface preparation. They are best suited for small components and rapid assembly processes.
Applications for cyanoacrylate adhesives:
- Attaching small plastic housings
- Fixing lightweight sensors and antenna mounts
- Field repairs and quick fixes
- Bonding elastomeric parts
The rapid curing nature of cyanoacrylates allows for high-throughput assembly and immediate handling. They are widely used to assemble lightweight, non-structural components and for tacking wires or components in confined enclosures.
Acrylic Adhesives
Acrylic adhesives provide a combination of toughness, flexibility, and chemical resistance. They are capable of bonding dissimilar materials and can perform well under dynamic loads.
Applications for acrylic adhesives:
- Mounting composite materials to metal housings
- Securing external fairings
- Attaching gimbal mounts and payload brackets
- Bonding vibration-sensitive components
Due to their resistance to thermal cycling and impact forces, acrylic adhesives are used where parts must withstand mechanical stress and outdoor exposure. Their ability to cure quickly and form durable bonds also supports efficient assembly processes.
Silicone Adhesives
Silicone adhesives are highly flexible and maintain stable properties across a wide temperature range. They are also electrically insulating and resistant to environmental aging.
Applications for silicone adhesives:
- Bonding optical lenses and covers
- Securing flexible cabling
- Attaching enclosures exposed to vibration
- Cushioning thermal interface components
In UAVs, silicone adhesives are favored for parts that may flex or expand due to thermal conditions. They are used where components require shock absorption and a stable interface despite mechanical stress or movement.
Polyurethane Adhesives
Polyurethane adhesives combine strength with elasticity, making them suitable for dynamic loads and impact-prone areas. They adhere well to plastics, composites, and metals.
Applications for polyurethane adhesives:
- Bonding outer skins and shells
- Integrating landing gear assemblies
- Attaching structural foam inserts
- Fixing components with mismatched expansion rates
Their durability under stress and environmental exposure makes polyurethane adhesives useful in both high-load and protective roles, such as damping impact forces during hard landings or absorbing vibration in transport UAVs.
UV-Cured Adhesives
UV-cured adhesives are single-component formulations that polymerize rapidly when exposed to ultraviolet light. These adhesives are commonly used in precision applications where controlled alignment and fast curing are essential.
Applications for UV-cured adhesives:
- Active alignment of optical sensors
- Bonding lenses and camera modules
- Securing optical windows and domes
- Assembling laser and LiDAR components
UV-cured adhesives offer the advantage of long open times followed by near-instantaneous curing under UV exposure, allowing technicians to precisely position optics, sensors, and imaging modules before locking them in place. They are widely used in payload assembly for surveillance, imaging, and mapping drones, where optical accuracy is critical. Additionally, their optical clarity and minimal outgassing make them ideal for sealed or lens-adjacent environments.
Other Adhesives & Glues Used in Unmanned Systems
Camera Module Adhesive by Dymax
In addition to mainstream options like epoxy, acrylic, and silicone, a range of niche adhesives are occasionally used in UAV applications, typically where specific material compatibility, temporary bonding, or legacy design requirements apply.
Toluene-Based Adhesives
These solvent-based adhesives are traditionally used for bonding rubber, flexible plastics, and vinyl. They rely on the aggressive solvency of toluene to dissolve and fuse polymer surfaces, resulting in rapid adhesion.
Applications for toluene-based adhesives:
- Bonding flexible polymer sheeting
- Repairing legacy rubber seals
- Temporary mounts where future disassembly is expected
While effective in certain plastic bonding scenarios, toluene adhesives are rarely specified in modern UAV manufacturing due to VOC emissions, regulatory restrictions, and worker safety considerations.
Anaerobic Adhesives
These adhesives cure in the absence of air and the presence of metal ions. They’re commonly used in mechanical assemblies for threadlocking or retaining cylindrical parts.
Applications for anaerobic adhesives:
- Securing threaded fasteners in vibration-prone systems
- Locking bearings and shafts
- Enhancing wear resistance in gear assemblies
Sealants Used in Drone Manufacturing
Silicone-Based Sealants
Silicone sealants remain permanently flexible with a high dielectric strength and moisture resistance. They are chemically stable and suitable for use across a broad temperature range.
Applications for silicone-based sealants:
- Sealing electronics housings
- Sealing connectors
- Sealing sensor enclosures
- Waterproofing areas near exposed wiring
These sealants are widely used for encapsulating sensitive circuitry and protecting against environmental intrusion. They are applied in drone control units, camera pods, and actuator housings where electrical insulation and weather protection are required.
Polyurethane Sealants
Polyurethane sealants cure to form semi-rigid, durable seals that maintain elasticity under mechanical strain. They adhere well to a variety of substrates and provide good weathering resistance.
Applications for polyurethane sealants:
- Sealing composite panel joints
- Sealing battery enclosures
- Filling exterior gaps
- Damping vibration at frame interfaces
These materials are commonly applied to maintain the integrity of outer drone structures exposed to shock and vibration. Their slightly elastic nature makes them ideal for bonding and sealing components that must move or flex under load.
Acrylic Sealants
Acrylic sealants offer UV resistance, fast drying times, and compatibility with painted or coated surfaces. While less flexible than silicones or polyurethanes, they maintain good adhesion in static applications.
Applications for acrylic sealants:
- Sealing external light enclosures
- Sealing ROV camera domes
- Bonding painted fairings
- Edge sealing for access hatches
They are typically used in UAVs designed for prolonged outdoor use where resistance to sunlight and temperature fluctuation is important.
Other Sealants Used in Unmanned Systems
Besides high-performance silicones, polyurethanes, and hybrids, additional sealant chemistries may be used where cost, curing time, or substrate specificity dictate.
Solvent-Based Sealants
These traditional formulations rely on volatile solvents for curing and adhesion, and are often used in non-critical areas or legacy designs.
Applications for solvent-based sealants:
- Sealing access panels in older UAV designs
- Bonding foam or rubber insulation layers
- Temporary or field-repair sealing
Though useful in specific settings, solvent-based sealants are typically avoided in favor of safer, more durable options that meet modern aerospace standards.
Butyl Rubber Sealants
Butyl-based compounds offer long-term moisture resistance and plasticity. They are non-curing, remaining flexible over time.
Applications for butyl sealants:
- Edge sealing of enclosures
- Cable grommet sealing
- Weatherproofing removable covers
These are valued in service scenarios where rework or re-access is required, or where a non-hardening seal provides mechanical damping and environmental protection.
Adhesives & Sealants in Drone Manufacturing
Adhesives and sealants offer practical, high-performance solutions for bonding, sealing, and protecting the components of unmanned systems. Each material type is suited to specific tasks, whether it’s bonding composite airframes with epoxy, sealing connectors with silicone, or mounting payloads using acrylic adhesives. The correct selection and application of these materials directly influence the weight, durability, and operational reliability of the drone. As the demand for performance and miniaturization grows in UAV design, so does the reliance on advanced bonding and sealing technologies.
