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When rapid assembly needs to bridge larger gaps or bond porous materials, standard instant adhesives often fall short. Permabond 240 delivers a fast, strong bond precisely where challenging surfaces or irregular fits demand a higher viscosity solution. It ensures components are secured in seconds, maintaining tight production schedules.
Permabond 240 was formulated for applications where conventional low-viscosity cyanoacrylates struggle. Its key purpose is to effectively bridge gaps up to 0.4 mm and penetrate porous substrates, which would otherwise wick away thinner adhesives. This ensures reliable, high-strength bonds on materials like plastics, rubber, and metals, making it particularly valuable for high-speed production lines requiring fast, consistent results without mixing or heat curing.
Permabond 240’s high viscosity, measured at 1,200-2,500 mPa.s at 25°C, allows it to effectively fill and bond gaps up to 0.4 mm. This is critical for applications with less-than-perfect component fit or porous surfaces that would absorb thinner adhesives. With a fixture time of just 15-20 seconds on materials like steel, rubber, and phenolic, parts are held in place rapidly, accelerating assembly lines. Once cured, it achieves impressive shear strengths of 21-25 N/mm² on steel, providing a robust, permanent bond.
This adhesive works best on clean, dry, and grease-free surfaces. For optimal adhesion on some metals, such as aluminium or copper, a light abrasion with emery cloth helps remove the oxide layer. Apply sparingly to one surface, then bring components together quickly and align them. Apply sufficient pressure to spread the adhesive into a thin film. Do not disturb or realign until initial strength is achieved, typically within seconds.
For difficult or porous surfaces, a Permabond activator can accelerate cure speed. When bonding polyolefin plastics like polypropylene, polyethylene, PTFE, or silicone, first prime the surface with Permabond Polyolefin Primer. Excess adhesive can be removed with Permabond CA solvent, nitromethane, or acetone.
Manufacturing & Assembly: Ideal for production lines requiring high-speed bonding of diverse materials where fit-up may not be perfectly precise, or components include porous elements. Its rapid fixture time maintains fast throughput.
Joinery & Cabinets: Effectively bonds porous wood-based materials to plastics, metals, or laminates, providing quick and durable assembly of fixtures and components where gaps or material variations are common.
Signage: Delivers fast, strong bonds for various sign components, including plastics, metals, and composite boards, handling typical assembly gaps and mixed material requirements.
Yes, Permabond 240 is specifically designed for porous substrates. Its high viscosity (1200-2500 mPa.s) helps prevent excessive absorption into the material, ensuring a strong, reliable bond.
Permabond 240 can effectively fill gaps up to 0.4 mm. This higher gap-filling capability distinguishes it from lower viscosity instant adhesives, reducing the risk of bond failure in applications with less-than-perfect joint fit.
Fixture time is typically 15-20 seconds on steel, Buna N rubber, and phenolic. Full strength develops within 24 hours. Be aware that larger gaps or acidic surfaces can slow the cure.
Yes, store Permabond 240 between 2°C and 7°C. Allow the adhesive to reach room temperature before opening to prevent condensation, which can reduce its shelf life.
| Application | Key benefit | Primary trades |
|---|---|---|
| Assembly with moderate gaps | Handles up to 0.4 mm gaps, preventing bond failure where thinner CAs would struggle. High viscosity maintains material presence in the joint. | Manufacturing, fabrication, industrial maintenance |
| Bonding porous materials | High viscosity (1200-2500 mPa.s) reduces absorption into substrates, ensuring more adhesive remains at the bond line for strength. | Sign makers, model makers, product assembly |
| Rapid bonding of plastics, rubber & metals | Achieves handling strength in 15-20 seconds on common substrates, streamlining production and assembly processes. | Electronics assembly, automotive repair, general trade workshops |
| General industrial adhesive tasks | 100% reactive ethyl cyanoacrylate chemistry provides strong, solvent-free bonds. MIL-A-46050C approved for existing designs. | Engineers, maintenance technicians, general industrial users |
Warning: Cyanoacrylate. Danger. Bonds skin and eyes in seconds. Keep out of the reach of children.
Wear protective gloves (category III, e.g., nitrile), protective clothing (long-sleeved overalls), safety footwear, and airtight protective goggles (EN 166). If exposure limits are exceeded, use a mask with a type A filter or self-contained breathing apparatus.
Ensure the workplace is well-aired with effective local aspiration. Use respiratory protection devices if technical measures are insufficient to limit exposure.
Store in the original container, sealed, in a well-ventilated place, away from direct sunlight. Keep containers away from incompatible materials such as water, alcohol, and amines. Store between 2°C and 7°C; allow to reach room temperature before opening to prevent condensation. Dispose of waste via an authorised firm according to national and local regulations.
Proper surface preparation is crucial for reliable adhesive performance and to prevent bond failure. Follow these guidelines for optimal results.
Surface prep: Ensure surfaces are clean, dry, and grease-free. Use a suitable solvent like acetone or isopropanol for degreasing.
Primer: Not required for most common plastics, rubber, and metals.
Surface prep: Degrease as above. Light abrasion with emery cloth can help remove the oxide layer, promoting better adhesion.
Primer: Not required.
Surface prep: Ensure surfaces are clean and dry. The higher viscosity of Permabond 240 is formulated to manage porous materials.
Primer: For difficult or highly porous surfaces, a Permabond activator is recommended to ensure optimal cure speed and bond development.
Surface prep: Degrease. These low surface energy plastics are challenging to bond.
Primer: Required. Prime first with Permabond Polyolefin Primer (POP) to achieve a bond.
| Property | Value |
|---|---|
| Chemical Composition | Ethyl cyanoacrylate |
| Appearance | Colourless |
| Viscosity at 25°C | 1200-2500 mPa.s |
| Specific Gravity | 1.1 |
| Maximum Gap Fill | 0.4 mm |
| Fixture Handling Time (Steel) | 15-20 seconds |
| Fixture Handling Time (Buna N Rubber) | 15-20 seconds |
| Fixture Handling Time (Phenolic) | 15-20 seconds |
| Full Strength Cure Time | 24 hours |
| Shear Strength (Steel, ISO4587) | 21-25 N/mm² (3000-3600 psi) |
| Shear Strength (Aluminium, ISO4587) | 8-9 N/mm² (1200-1300 psi) |
| Shear Strength (Zinc, ISO4587) | 10 N/mm² (1450 psi) |
| Shear Strength (ABS, ISO4587) | >8 N/mm² (1200 psi) (Substrate Failure) |
| Shear Strength (PVC, ISO4587) | >11 N/mm² (1600 psi) (Substrate Failure) |
| Shear Strength (PC, ISO4587) | >5 N/mm² (700 psi) (Substrate Failure) |
| Shear Strength (Phenolic, ISO4587) | 14 N/mm² (2000 psi) |
| Impact Strength (ASTM D-950) | 3-5 kJ/m² (1.4-2.4 ft-lb/in²) |
| Dielectric Constant at 10kHz | 2.5 |
| Dielectric Strength | 25 kV/mm |
| Coefficient of Thermal Expansion | 90 x 10⁻⁶ mm/mm/°C |
| Coefficient of Thermal Conductivity | 0.1 W/(m.K) |
| Hardness (ISO868) | 85 Shore D |
| Minimum Service Temperature | -55°C |
| Flash Point | 83 °C |
| Boiling Point | > 100 °C |
| Dynamic Viscosity (23°C) | ~ 2000 mPa.s |
| Vapour Pressure (25°C) | 0.6 mBar |
| Density | 1.1 |
Here are some common examples on where Permabond 240 used by our customers.
