Silicones, silicone oils, sprays
Casting and potting resins
Technical Data
Typical values, not a specification. The technical data sheet (TDS) is binding.
Product Information
- Brand
- Permabond
- Manufacturer
- Permabond Engineering Adhesives Ltd
- Container
- 320 ml
- Country of origin
- Italy
Cure speed (oven)
- 135°C
- 35 minutes
- 150°C
- 20 minutes
- 160°C
- 15 minutes
Performance at Full Cure
- Tensile strength (ASTM D-2095-69)
- 35-40 N/mm²
- Impact strength (ASTM D-950)
- 30-40 kJ/m²
- Peel resistance (aluminum) (ISO 4578)
- 180-200 N/25mm
Physical Properties
- Chemical group
- Epoxy resin
- Color
- black
- Viscosity (adhesives)
- 40000-60000
- Specific Gravity
- 1.1
Curing values
- Maximum gap fill (mm)
- 0.5
Mechanical properties
- Hardness (Shore D)
- 84
Shear strength ISO 4587 in N/mm²
- Steel
- 30 - 35 N/mm²
- Glass/ Polyester
- 3-5 N/mm²
- Glass/ Epoxy
- 14-16 N/mm²
- Carbon fiber
- 18-22 N/mm²
Thermal Properties
- Storage Temperature (°C)
- 2-7
Features
- Cure speed (induction)
- < 2 minutes
Product Description
Permabond ES5681 is a special 1K epoxy with an engineering profile.
Engineering 1K epoxy with specific properties.
Special 1K epoxy for engineering applications — technical data available via SILITECH distribution.
What distinguishes Permabond ES5681
What is Permabond ES5681 used for?
Processing
Recommended accessories
Important Notes
Which Permabond 1K epoxy for which application?
Permabond ES5681 in direct comparison with related products of the ES series.
Permabond ES5681 Current Product | Permabond ES568 → | Permabond ES560 → | Permabond ES578 → | |
|---|---|---|---|---|
| Application | Special 1K epoxy (Engineering) | Comparable | Comparable | Flame-retardant |
| Chemistry | One-component epoxy resin | 1K epoxy | 1K epoxy | 1K epoxy |
| Curing | Heat-cure | Heat-cure | Heat-cure | Heat-cure |
Frequently asked questions about Permabond ES5681
Practical application and design questions — answered by SILITECH.
Special 1K epoxy for engineering applications. 1K epoxies are processed directly without mixing and cured in a single heat-cure step.
1K epoxies are processed directly from the container without mixing — no pot life limitation, no mixing errors. Disadvantage: heat curing required (industrial oven, IR lamp, or hot air). 2K epoxies cure at room temperature but require precise mixing and have a limited pot life. 1K is suitable for line production with heat-cure infrastructure, 2K for workshops without an oven.
Heat curing. For exact conditions, refer to the Permabond TDS — typically 30 minutes at 150 °C or equivalent heat input (e.g., 60 min @ 120 °C).
1K heat-cure epoxies bond metals (steel, aluminum, copper), composites (CFK, GFK), ceramics, and selected plastics (with heat resistance). Substrates must tolerate the curing temperature (typically 150 °C).
Permabond ES5681 does not have specific industry approvals such as UL94-V0 (see ES578 for the flame-retardant variant). For general industrial applications, the product is approved according to Permabond standards.
At 5 to 25 °C. 1K heat-cure epoxies have limited storage stability — reactivity decreases with higher storage temperature. For long shelf life, store refrigerated. Allow adhesive to warm to room temperature before opening.
From the Permabond 1K epoxy range: Permabond ES5681 (Special 1K epoxy (Engineering)); Permabond ES568 (Engineering); Permabond ES560 (Engineering); Permabond ES578 (UL94-V0). For UL94-V0 fire protection, see ES578; for high temperature, see ES566/ES569; for IR/hot air curing (without an industrial oven), see ES5691.