Consistent Performance in Demanding Environments – IOTA GNJ 3128H Silicone Gel
Designed for applications where stable material behavior and optical clarity are required, the IOTA GNJ 3128H phenyl silicone gel offers a balanced combination of processability and post-cure properties. It is commonly used as a protective coating for electronic assemblies, including transistors and integrated circuits, as well as an elastic bonding agent for optical instruments.
The two-component system (A and B) has a pre-mix viscosity of 600±200 cP for each part at 22°C and 50% RH. After mixing at a 1:1 weight ratio, the working time is at least 240 minutes, allowing flexibility during application. Room-temperature curing is completed in about 24 hours, with the option to accelerate through heating for higher throughput.
Cured material properties include a Shore A00 hardness of 25±5, a density of 0.98 g/ml, and light transmittance of 93% or higher. Volume resistivity exceeds 1.0×10¹⁴ Ω·cm, indicating good insulating behavior. The gel remains elastic over a broad temperature range from -59°C to 200°C, contributing to low mechanical stress on components and easier rework if needed.
The curing process generates no by-products, and the formulation is solvent-free with low volatile emissions. It supports deep-section curing and shows good resistance to moisture and aging. To ensure consistent results, avoid contact with amines, sulfur compounds, phosphorus-based materials, or metal ions such as tin, lead, or mercury.
The product is supplied in 15 kg or 5 kg containers per component, stores for up to six months in a cool, ventilated, and dry area, and is classified as non-hazardous for transport.