PERMABOND® ET540 is a two-part, 2:1 mixable, semi- flexible toughened no slump epoxy adhesive with good adhesion to a variety of substrates such as wood, metal, ceramics and some plastics and composites.
Permabond ET540 forms tough bonds providing high peel resistance and high shear strength coupled with excellent resistance to high temperatures. The extended work life of this product allows for adjustment making it very suitable for larger applications.
FEATURES AND BENEFITS
- Adhesion to a wide variety of substrates
- Full cure at room temperature
- Easy to appMK
- High shear and peel strength
- Good impact strength
- High temperature resistance
- Non-drip rheology
Physical Properties of Uncured Adhesive
| ET540 A side | ET540 B side |
Chemical composition | Epoxy Resin | Polyamine Hardener |
Appearance | White | Amber |
Viscosity @ 25°C | 20rpm: 75,000 mPa.s (cP) 2rpm: 225,000 mPa.s (cP) | 20rpm: 150,000 mPa.s (cP) 2rpm: 500,000 mPa.s (cP) |
Specific gravity | 1.1 | 1.0 |
Typical Curing Properties
Mix ratio by volume | 2:1 |
Maximum gap fill | 5 mm 0.2 in |
Usable / pot life @23°C | 120-150 mins |
Handling time @23°C | 150-180 mins |
Working strength @23°C | 24 hours |
Full cure @23°C | 72 hours |
Typical Performance of Cured Adhesive
Shear strength* (ISO4587) | Mild steel: 22-26 N/mm² (3190-3770psi) Aluminium: 20-24 N/mm² (2900-3480psi) Stainless Steel: 32-35 N/mm² (4640-5075psi) Carbon Fibre: >25 N/mm² ** SF (>3625psi) FRP Glass/Polyester: >8 N/mm²** SF (>1160psi) FRP Glass/Epoxy: 23-27 N/mm² (3335-3915psi) PEEK: 2-3 N/mm² (290-435psi) Polycarbonate: 2-4 N/mm² (290-580psi) PA6 30% filled: 3-5 N/mm² (435-725psi) |
Peel strength (aluminium) (ISO11339) |
60-80 N/25mm (13-18 PIW) |
Hardness (ISO868) | 60-75 Shore D |
Elongation at break (ISO37) | 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) |
