Knowde Enhanced TDS
Identification & Functionality
- Carrier
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Specific Features
- Adhesion promoting primer
- General purpose
- Solvent-based
Applications & Uses
- Application Method
- Application Details
ELASTOSIL® AUX G 3246 is a solution of a siloxanes and reactive silanes in organic solvents. It is used to pretreat metallic, ceramic, glass or other polymeric substrate surfaces to enable excellent adhesion towards subsequently vulcanized ELASTOSIL® R solid silicone elastomers (HCR/HTV, peroxide curing). After the solvents have evaporated, a rigid film of silicone resin is formed on exposure to atmospheric humidity. The primer film adheres firmly to a large variety of substrates and serves as adhesion promoter for subsequently applied silicone rubbers.
Processing
- It is recommended to clean all substrate surfaces with solvents (e.g. white spirits followed by ethanol or acetone) prior to the application of ELASTOSIL® AUX G 3246 . The primer may be applied directly or in diluted form with a variety of application methods (e.g. coating, dipping, brushing or spraying).
- It is recommended to stir the primer thoroughly before application. The resulting primer layer should be as thin as possible. Usually the best results can be achieved with a primer layer between 1 an 10 µm thickness, corresponding to a coating weight of 5 to 50 g/m².
- If the primer needs to be diluted, organic solvents like white spirits or ISOPAR® E can be used in a ratio of 1:1 - 1:10. After application of the primer, the solvent should be evaporated at room temperature and moderate atmospheric humidity for at least 2 hours to allow for the formation of a consistent primer film.
- It is recommended to apply the silicone rubber soon afterwards, but not later than 2 days. In some cases the adhesion can be improved by heating the primered substrate after evaporation of the solvents to 100-150°C for up to one hour.
- It is important to note that in some cases the initial adhesion will be sufficient for handling while the maximum adhesive strength will be achieved after a few days. When adhesion of silicone elastomers onto very smooth substrates has to be achieved it is recommended to roughen the surface by grinding or blast cleaning.
- In case of metals the substrate should be given several hours time to regenerate its oxygen layer before applying ELASTOSIL® AUX G 3246 . Since adhesion is determined by the nature of the substrate, the applied silicone elastomer and the processing parameters, proper trials are absolutely necessary.
Properties
- Color
- Physical Form
- Appearance
- Colorless to yellow
- Typical Properties
- Properties
- Provides excellent adhesion onto various substrates.
- Solvent based
- Various application methods (e.g. coating, dipping, brushing spraying)
- Further dilution in organic solvents possible
| Value | Units | Test Method / Conditions | |
| Density (at 23°C) | 0.86 | g/cm³ | ISO 2811 |
| Dynamic Viscosity (at 25°C, 20 rpm) | 2600 | mPa·s | Brookfield |
| Solid Content | 30 | % | — |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Country Availability
- Regional Availability
- Packaging Information
This product is available in 0.8 kg bottles, 20 kg pails and 150 kg drums.
Storage & Handling
- Storage Information
Important Note
ELASTOSIL® AUX G 3246 is sensitive towards humidity. In contact with moisture the liquid primer becomes turbid and the adhesive strength of the primer is impaired. ELASTOSIL® AUX G 3246 should therefore be stored in a sealed container after usage. In addition, it is strongly recommended to stir or shake the primer thoroughly before applying.