Permabond ET540 Semi-Flexible Toughened 2-Part Epoxy – No-Slump Structural Adhesive
Need Datasheets? Need Accessories?
• Click Here to visit our Datasheet Server (TDS, SDS, Fact Sheets, Selector Guides, etc)• Check out Popular Accessories below by scrolling down just a bit on this page.
Regular price
$ 88.99 USD
Call for ETA
PERMABOND® ET540 is a two-part, 2:1 mixable, semi-flexible toughened epoxy adhesive with a no-slump, non-drip rheology and good adhesion to a wide variety of substrates including wood, metal, ceramics, and some plastics and composites.
ET540 forms tough bonds that combine high peel resistance with high shear strength, plus excellent resistance to elevated temperatures. Its extended 120-150 minute working life makes it especially well suited to larger assemblies where parts need to be positioned and adjusted before the joint sets.
Why Choose Permabond ET540?
- Adhesion to a wide variety of substrates
- Full cure at room temperature
- Easy to apply with a non-drip, no-slump consistency
- High shear and peel strength
- Good impact strength
- High temperature resistance
- Extended 120-150 minute pot life for larger applications
Strong Bonding Performance
| Substrate | Shear Strength (ISO4587) |
|---|---|
| Mild Steel | 22-26 N/mm² (3,190-3,770 psi) |
| Stainless Steel | 32-35 N/mm² (4,640-5,075 psi) |
| Aluminium | 20-24 N/mm² (2,900-3,480 psi) |
| FRP Glass/Epoxy | 23-27 N/mm² (3,335-3,915 psi) |
| Carbon Fibre | >25 N/mm² (>3,625 psi, substrate failure) |
Peel strength on aluminium runs 60-80 N/25mm (13-18 PIW), with a cured hardness of 60-75 Shore D and 4-8% elongation at break.
Built Tough, Built Flexible
Unlike rigid, brittle epoxies, ET540's toughened semi-flexible formulation resists cracking under impact and vibration while still delivering structural-grade shear and peel strength. It carries a glass transition temperature (Tg) of 45-55°C (113-131°F) and can tolerate brief excursions to higher temperatures, such as paint-baking or wave-soldering processes, provided the joint isn't unduly stressed.
Easy 2:1 Mixing
ET540 mixes 2:1 by volume through a dual cartridge and static mixing nozzle. Usable pot life runs 120-150 minutes at 23°C, with handling time of 150-180 minutes and full cure reached in 72 hours at room temperature.
Recommended Accessories
For the 400ml dual cartridge: Maven MV400-36X Manual Dispenser and MixPac MFQ 10-24T Static Mixing Nozzle.
How to Use
- Insert the cartridge into the application gun and guide the plunger into the cartridge.
- Remove the cartridge cap and dispense material until both sides are flowing evenly.
- Attach the static mixer to the end of the cartridge and begin dispensing.
- Clean and degrease surfaces before applying the adhesive; lightly abrade metals such as aluminium or copper to remove the oxide layer.
- Apply material to one of the substrates.
- Join the parts within the usable pot life of the mixed adhesive.
- Clamp or otherwise apply pressure to the assembly until handling strength is obtained.
- Allow 72 hours at 23°C (73°F) for full cure; heat can be used to accelerate curing.
Typical Applications
- General manufacturing and structural assembly
- Automotive, marine, and transportation repair
- Construction and composite/carbon fibre fabrication
- Cabinetry and woodworking
- Bonding handles, brackets, and mounting hardware
Product Specifications
- Mix ratio: 2:1 by volume
- Specific gravity: 1.1 (Part A) / 1.0 (Part B)
- Maximum gap fill: 5mm (0.2 in)
- Usable/pot life @23°C: 120-150 minutes
- Handling time @23°C: 150-180 minutes
- Full cure @23°C: 72 hours
- Hardness: 60-75 Shore D
- Elongation at break: 4-8%
- Glass transition temperature (Tg): 45-55°C (113-131°F)
- Dielectric strength: 15-25 kV/mm
- Thermal conductivity: 0.55 W/(m·K)
- Storage temperature: 5-25°C (41-77°F)
- Minimum service temperature: -40°C (-40°F)
Not recommended for use in contact with strong oxidizing materials. For professional or industrial use only.