WACKER SilGel® 612 PT A/B
WACKER SilGel® 612 PT A/B is a pourable, addition-curing RTV-2 silicone rubber. WACKER SilGel® 612 PT A/B is a modification of WACKER SilGel® 612 with higher hardness and higher reactivity.
Properties
• Two-part, 1 : 1 mixing ratio
• Low viscosity
• Rapid cure
• Low hardness (silicone gel)
Data sheets
• Encapsulation of electronic components
• Optical bonding of displays
Caution!
Only A and B components with the same batch number may be processed together!
Surface preparation
All surfaces must be clean and free of contaminants that will inhibit the cure of WACKER SilGel® 612 PT A/B. Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds.
If a substrate’s ability to inhibit cure is unknown, a small scale test should be run to determine compatibility.
Mixing Component
B of WACKER SilGel® 612 PT A/B contains the platinum catalyst, component A the crosslinker. Even traces of the platinum catalyst may cause gelling of the component containing the crosslinker. Therefore tools (spatula, stirrers, etc.) used for handling the platinum-containing component or the catalyzed compound must not come into contact with this component. The two components should be thoroughly mixed at a 1 : 1 ratio by weight or volume.
To eliminate any air introduced during dispensing or trapped under components or devices a vacuum de-airing under a vacuum encapsulation is recommended.
Curing:
Curing time of addition curing silicone rubber is highly dependent on temperature, size and heat sink properties of the component being potted.
Typical curing process is 4h / 23°C or 30min / 80°C or 5min / 120°C.
Storage
WACKER SilGel® 612 PT A/B should be stored cool and dry. The 'Best use before end' date of each batch appears on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable. In this case however, the properties required for the intended use must be checked for quality as-surance reasons.
Sales and support
Ann Arbor, MI 48108
United States
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