ARALDITE 2021-1
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- Rapid 9-Minute Strength Development
- Broad Multi-Material Bonding
- 27 MPa Aluminum Lap Shear
Product Description
ARALDITE® 2021-1 is a two-component, room-temperature-curing, toughened methacrylate structural adhesive for rapid assembly of selected plastics, composites and metals. The 1:1 mix system forms a thixotropic, pale-yellow adhesive with a typical pot life of approximately 3 minutes at 25°C. It can be dispensed manually or robotically, including from mixer-equipped cartridges. A typical 0.25-0.5 mm adhesive layer is recommended for high lap-shear performance, although some steel joints may require greater thickness. The cured adhesive is suitable for service temperatures up to 100°C. It should not be selected for copper, brass or copper-alloy substrates.
Key features
- Rapid strength development: Typical lap shear strength exceeds 1 MPa after 9 minutes and 10 MPa after 13 minutes at 23°C.
- Multi-material bonding: Supports bonding of selected plastics, composites and metals, with substrate-specific testing reported for multiple grades.
- Toughened cured performance: Typical tensile strength is 42 MPa with elongation above 10%, and service use is supported up to 100°C.
Applications / Suitable for
- Rapid assembly operations using manual or robotic adhesive application
- Bonding selected plastics and composites, including GRP, CFRP, SMC, ABS, PVC, PMMA, PC and polyamides
- Bonding aluminium, mild steel, stainless steel and galvanised steel
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-supplied and mixed properties
Specified and typical product data are shown with the applicable component or mixed state. Typical values are not guaranteed specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A colour | Off-white | - | Visual |
| Part B colour | Yellow / greenish | - | Visual |
| Mixed adhesive colour | Pale yellow | - | Visual |
| Specific gravity | A: 1.02; B: 0.95; mixed: approx. 1 | - | Component and mixed-material values |
| Component viscosity | A: 15-50; B: 10-50 | Pa·s | 25°C; method A191 |
| Mixed adhesive rheology | Thixotropic | - | Mixed state |
| Mix ratio | 100:100 | parts | By weight and by volume |
| Pot life | Approx. 3 | min | 100 g mixed adhesive at 25°C |
| Time to peak exotherm | 7-15 | min | 20 g mixed adhesive; method A159 |
Typical final-state properties
Typical laboratory data are provided for technical evaluation and are not guaranteed specifications. Cure and test conditions are retained where they affect interpretation.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Tensile strength | 42 | MPa | Typical; ISO 527; cured 16 h at 40°C and tested at 23°C |
| Tensile modulus | 1800 | MPa | Typical; ISO 527; cured 16 h at 40°C and tested at 23°C |
| Elongation at break | >10 | % | Typical; ISO 527; cured 16 h at 40°C and tested at 23°C |
| Time to lap shear strength >1 MPa | 9 | min | Typical at 23°C |
| Time to lap shear strength >10 MPa | 13 | min | Typical at 23°C |
| Service temperature | Up to 100 | °C | Supplier key property; validate in the intended joint and service environment |
| Lap shear after thermal cycling | 27 | MPa | Typical; ISO 4587 on aluminium; sandblasted and degreased; cured 16 h at 40°C; 100 cycles of 6 h from -30°C to 70°C |
