Professional's choice for protecting electrical installations. This versatile, non-toxic compound remains permanently soft, making it perfect for sealing around junction boxes, flashings, and service entrances. It can be painted immediately after application and won't corrode metals or adversely affect plastic materials. UL Listed, this dark gray putty is easy to apply and provides an effective moisture and air barrier, ensuring long-lasting durability. Features Seals around junction boxes, flashings, masonry and service entrances Provides a moisture and air barrier for long lasting protection Permanently soft, non-toxic compound Can be painted immediately after application Won't adversely affect plastic materials or corrode metals Applications Electrical and conduit sealing Patch gaps or leaks around HVAC/R piping and ducts Sealing openings in plumbing penetrations