Abstract
Electronic systems inside a military shelter are susceptible to electromagnetic and radio frequency interference (EMI/RFI) generated from electrical and electronic equipment. A conductive sealant is necessary at the seams and joints to preserve continuity of current flows in a shelter. Traditionally, silver plated-copper filled silicones are used to seal seams and joints. A nonconductive polysulfide is normally used as a covercoat to provide paint adhesion. Several commercially available conductive sealants were evaluated to select a sealant that is paintable, easily processable, corrosion resistant, and able to provide long term shielding effectiveness. A nickel filled polythioether was selected as a replacement conductive sealant. The sealant was chosen based upon its relatively low cost, excellent corrosion resistance, and superior shielding effectiveness.