ARALDITE 2051
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Rapid 15-Minute Strength Development
- 1:1 Non-Sag Cartridge Processing
- 20 MPa structural Lap Shear
Product Description
ARALDITE® 2051 is a fast-curing, two-component toughened methacrylate structural adhesive for metal, plastic and composite bonding. It mixes 1:1 by weight or volume, forms a non-sagging pale-yellow adhesive and provides a 4–6 minute pot life for a 20 g mass at 25°C. The system can be applied and cured from 0°C to 40°C, including humid conditions and underwater. Specified lap shear strength exceeds 20 MPa at 25°C, while typical cured properties include 40 MPa tensile strength, 1700 MPa tensile modulus and approximately 10% elongation at break. Surface cleaning is recommended, with abrasion or chemical etching used where maximum joint durability is required.
Key features
- Fast strength development from 0°C to 40°C: On sandblasted aluminium under contact pressure, typical lap shear exceeds 1 MPa after 15 minutes and 10 MPa after 25 minutes at 23°C.
- Wet and humid-area processing: Supports application and cure in humid environments and underwater.
- Toughened structural performance: Specified lap shear strength is above 20 MPa at 25°C, with service-temperature suitability documented up to 120°C.
Applications / Suitable for
- Structural bonding of aluminium, steel, stainless steel and galvanised steel
- Selected plastics and composites, including CFRP, GRP, PMMA, PVC, polycarbonate and ABS
- Bonding operations in humid or underwater conditions
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-supplied / before-processing properties
Values distinguish the resin, hardener and mixed adhesive where applicable. Specified values retain the stated test mass, temperature and method context.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Colour | Off-white / yellow-greenish / pale yellow | — | Resin / hardener / mixed adhesive; visual |
| Specific gravity | ca. 1 / ca. 1 / ca. 1 | — | Resin / hardener / mixed adhesive |
| Viscosity at 25°C | 35–60 / 15–30 | Pa·s | Resin / hardener |
| Mixed-adhesive rheology | Non-sagging | — | Mixed adhesive at 25°C |
| Mix ratio by weight | 100:100 | parts | Resin : hardener |
| Mix ratio by volume | 100:100 | parts | Resin : hardener |
| Pot life | 4–6 | min | 20 g mixed mass at 25°C; specified |
| Time to peak exotherm | 8–14 | min | 20 g mixed mass; method A159; specified |
After-processing / final-state properties
The lap shear value is specified. Other values are typical laboratory data and must not be treated as guaranteed design values for every substrate, joint or service condition.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Lap shear strength at 25°C | >20 | MPa | Mixed adhesive; method A501; specified |
| Glass transition temperature, onset | 98 | °C | Typical average; DMA; cure 24 h at room temperature |
| Glass transition temperature, midpoint | 127 | °C | Typical average; DMA; cure 24 h at room temperature |
| Tensile strength | 40 | MPa | Typical average; ISO 527; cure 24 h at room temperature; tested at 23°C |
| Tensile modulus | 1700 | MPa | Typical average; ISO 527; cure 24 h at room temperature; tested at 23°C |
| Elongation at break | ca. 10 | % | Typical average; ISO 527; cure 24 h at room temperature; tested at 23°C |
| Service temperature capability | Up to 120 | °C | Documented product key property; validate the bonded assembly under actual service conditions |
