3M Scotchcast Electrical Resin 8 is a low-stress, highly moisture-resistant compound that cures at room temperature. Offers long pot life, low viscosity, and is commonly used to coat printed circuit boards, pot connectors, and impregnate electrical and electronic components.
Because of its low exotherm, resin 8 is also frequently specified for impregnating and encapsulating temperature sensitive units
Usage Information Mixing Mix the separate parts before removing them from their containers. They may be warmed to 60oC (140oF) to aid mixing. (Gel time is approximately 30 minutes @ 60oC). Thoroughly mix parts A and B in the correct proportions. Mix until the color is absolutely uniform and a homogeneous mixture is obtained. Deaerating Air introduced during mixing can be removed by evacuating at 5 to 10 mm of mercury (Hg) absolute pressure. The 3M Scotchcast Electrical Resin can be warmed to aid air removal. The container side wall should be four times the height of liquid resin to contain the foaming that takes place under vacuum. Casting and Impregnating Pour the warm resin into the preheated 100oC (212oF) mold. If no mold is used, dip the preheated part into the resin. Heating the part, resin and mold aids impregnation. For maximum impregnation, evacuate at 5 mm mercury (Hg) absolute pressure, or pour under vacuum and hold for several minutes before releasing.