CENUSIL® Gel 735 AB IN Silicone Gel 

Characteristics

CENUSIL® Gel 735 AB is a pourable, addition-curing, RTV-2 silicone rubber that vulcanizes at room temperature to a very soft silicone gel.

Special characteristics

• Two-part, 1:1 mixing ratio
• Low viscosity
• Rapid heat cure
• Crystal clear
• Tack free

Application

• Encapsulation of electronic components for the automotive and power electronics industries
• Encapsulation of solar cells
• Production of damping elements

Processing

Surface preparation
All surfaces must be clean and free of contaminants that will inhibit the cure CENUSIL® Gel 735 AB .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 A of CENUSIL® Gel 735 AB contains the platinum catalyst, component B 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 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. We recommend running preliminary tests to optimize conditions for the particular application. Comprehensive processing instructions are given in our leaflet “WACKER RTV-2 Silicone Rubber – Processing”.

Ratio
For logistical reasons we can only accept orders in a mixing ratio of A : B = 1 : 1.

Pigmentation
CENUSIL® Gel 735 AB can be pigmented by adding 1 – 4 % of an ELASTOSIL® FL pigment paste.
We recommend running preliminary tests to optimize conditions for the particular application. Comprehensive processing instructions are given in our leaflet “Wacker RTV-2 Silicone Rubber- Processing”.

Storage stability

CENUSIL® Gel 735 AB has a shelf life of at least 12 months when stored between 5 °C and 30 °C in the originally sealed container. 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 assurance reasons.

Safety information

According to the latest findings, the addition-curing silicone rubber CENUSIL® Gel 735 AB contains neither toxic nor aggressive
substances which would require special handling precautions. General industrial hygiene regulations should be observed. Detailed safety information is available in Material Safety Data Sheet.