

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The Sioux Chief Mfg Co. 963-15PK2 is a 1-pound package of brown, oil-treated jute oakum used for sealing and caulking in plumbing and construction applications. Oakum is a traditional fibrous packing material that has been used for decades in cast iron drain, waste, and vent pipe joints, as well as in driveway expansion joints and window frame caulking. The oil treatment helps the material compress and seal effectively when packed into a joint. This product is sold as an individual unit and is a standard supply item for licensed plumbers and general contractors working on both new construction and repair projects.
Brown oakum is commonly used in residential and commercial plumbing for sealing hub-and-spigot cast iron pipe joints before pouring molten lead or applying a mechanical joint compound. It also sees use in masonry and construction for filling expansion joints in driveways and caulking around window frames. Any plumber working with older cast iron drain systems or restoring period-appropriate infrastructure will recognize this as a standard caulking supply. It is sold in individual 1-pound units, making it straightforward to stock for service vans or supply rooms.
Designed as a standard packing material for hub-and-spigot cast iron drain, waste, and vent pipe joints, as well as general construction caulking applications including driveway expansion joints and window frames.
Oakum installation in cast iron pipe joints is typically performed by licensed plumbers in accordance with local plumbing codes and the International Plumbing Code (IPC). Before packing oakum into a joint, ensure flow through the line is stopped and the work area is clear. Pack the oakum firmly and evenly into the hub using a yarning iron and hammer before applying the finishing joint material. Do not over-pack or leave voids, as either condition can compromise the seal.
Thanks for subscribing!
This email has been registered!