WACKER SilGel 612 A/B SILICONE GEL Product description platinum-containing component or the catalyzed compound must not come into contact with this WACKER SilGel 612 A/B is a pourable, addition- component. curing, RTV-2 silicone rubber that vulcanizes at room The two components should be thoroughly mixed at a temperature to a very soft silicone gel. 1 : 1 ratio by weight or volume. To eliminate any air introduced during dispensing or Special features trapped under components or devices a vacuum encapsulation is recommended. - two-part, 1 : 1 mixing ratio Curing: - low viscosity Curing time of addition curing silicone rubber is highly - rapid heat cure dependent on temperature, size and heat sink - very low hardness (silicone gel) properties of the component being potted. - crystal clear - pronounced inherent tack The reactivity can be adjusted within wide limits by - flame retardant, UL listed 94HB adding Catalyst EP or Inhibitor PT 88 to suit the processing requirements of the particular application. Catalyst EP increases the reactivity, i. e., pot life and Application curing time are reduced. Inhibitor PT 88 is a pot life extender and prolongs pot - encapsulation of electronic components for the life and curing time. automotive and power electronics industries Further information is given in our leaflet Catalyst - encapsulation of solar cells EP/Inhibitor PT88. - production of damping elements - sealing of clean room filters Hardness If the gel is too soft and tacky, reducing the amount of component B will result in a harder, less tacky Processing vulcanizate. The hardest formulation is achieved with a mixing ratio for A : B of approximately 1.5 : 1. Caution: For logistical reasons we can only accept orders in a Only components A and B with the same lot number mixing ratio of A : B = 1 : 1. may be processed together Tack-free surfaces can be achieved by coating with ELASTOSIL RT 601. Surface preparation All surfaces must be clean and free of contaminants Pigmentation that will inhibit the cure of WACKER SilGel 612 A/B. WACKER SilGel 612 A/B can be pigmented by Examples of inhibiting contaminants are sulfur adding 1 - 4% of an ELASTOSIL FL pigment paste. containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds We recommend running preliminary tests to optimize especially organotin compounds. If a substrates ability conditions for the particular application. to inhibit cure is unknown, a small scale test should be Comprehensive processing instructions are given in run to determine compatibility. our leafletWacker RTV-2 Silicone Rubber - Processin. Mixing Component B of WACKER SilGel 612 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 Technical data sheet for WACKER SilGel 612 A/B / Version: 1.1 / Date of last alteration: 07.06.2013 1 / 3 Safety notes Storage According to the latest findings WACKER SilGel 612 The Best use before end date of each batch is shown A/B being an addition-curing silicone rubber contains on the product label. neither toxic nor aggressive substances which might require special handling precautions. General Storage beyond the date specified on the label does industrial hygiene regulations should be observed. not necessarily mean that the product is no longer usable. In this case however, the properties required Comprehensive instructions are given in the for the intended use must be checked for quality corresponding Material Safety Data Sheets. They are assurance reasons. available on request from WACKER subsidiaries or may be printed via WACKER web site