3M 09925, Electrical Moisture Block EMB-45R, 0.75 in X 100 ft X .045 in, Mastic Roll, Black, 7000058074

3M Electrical Moisture Block (EMB) is a self fusing, rubber based insulating adhesive/selaant designed to prevent the migration of water along harness wiring. EMB block is supplied on a release liner and offered in three standard sizes to accommodate different size wire bundles. It is compatible with typical wire insulation such as PVC, Hypalon(R) and crosslinked polyethylene.