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GE's InvisiSil* encapsulants offer superior long-term durability vs. conventional epoxy resins, which can cause device failure in as few as 1,000 hours. InvisiSil encapsulants offer excellent adhesion to a range of case and electrode materials, including ceramics, polyamides and silver and gold electrodes. InvisiSil encapsulants offer high transmittance and high refractive indexes from 1.4 to over 1.5. With their stability under thermal stress and UV light, these materials help to extend the useful life and increase the reliability of devices by resisting yellowing and delamination from the substrate that often occur with epoxy-based materials.