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MG Chemicals 8820 High Temperature Rigid Urethane, 2-Part Potting Compound, 375mL Kit
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About MG Chemicals 8820 High Temperature Rigid
8820 is a black, tough, high temperature, two-part polyurethane potting compound. It has a low mixed viscosity and properties similar to epoxy compounds, but with exceptional low temperature stability. As well, it adheres strongly to a wide variety of substrates, including metals, composites, glass, ceramics, and many plastics. 8820 offers exceptional physical protection, a high continuous operating temperature, and superior protection from acids, bases, and many organic solvents. Application Instructions For best results, follow the procedure below. Manual mixing: 1. (Optional) Pre-heat part A to improve surface quality. 2. Scrape settled material free from the bottom and sides of the part A container; stir the contents until homogenous. 3. Measure 2 part by volume of the pre-stirred part A, and pour into the mixing container. Ensure all contents are transferred by scraping the container. 4. Measure 1 part by volume of the part B, and pour into the mixing container. Ensure all contents are transferred by scraping the container. 5. Thoroughly mix parts A and B together. 6. (Optional) Put in a vacuum chamber at 25 night. 7. Pour the mixture into a container holding the components to be protected. 8. Blanket both parts with nitrogen if the material is not used up to prevent moisture. 9. Close the part A and B containers tightly between uses. Attention! Mixing >500 g at a time decreases working life and can lead to a flash cure. Limit the size of hand-mixed batches. For large production volumes, contact MG Chemicals Technical Support for assistance. Cure Instructions Room temperature cure: Let cure at room temperature for 48 h. Heat cure: Put in oven at 65 °C [149 °F] for 2 h. —OR— Put in oven at 80 °C [176 °F] for 1. 5 h.
