Mill-Rose 70891 1/2IN x 260IN Stainless Steel Teflon PTFE Tape

The Mill-Rose 70891 is a 1/2-inch x 260-inch stainless steel-grade PTFE thread seal tape engineered for professional thread sealing in demanding high-pressure, high-temperature, and chemically aggressive piping applications. Where standard white PTFE tape is adequate for light-duty water and gas service, the 70891 is formulated and densified for applications where thread joint integrity, chemical compatibility, and long-term seal reliability are non-negotiable — including stainless steel, brass, and specialty alloy fittings where standard tape can compress, extrude, or degrade under service conditions.

Manufactured by Mill-Rose, with over a century of professional plumbing and industrial product manufacturing behind the brand, the 70891 reflects the material consistency and density specification that professional pipefitters, industrial contractors, and mechanical engineers expect from a thread sealant used on critical joints. This is not commodity tape — it is a purpose-formulated PTFE product matched to the demands of stainless steel and high-performance threaded connections.

PTFE (polytetrafluoroethylene) — marketed widely under the DuPont trade name Teflon — is chemically inert across virtually the entire pH spectrum, rated for continuous service temperatures well beyond standard plumbing ranges, and completely non-reactive with both the fluids being conveyed and the metal surfaces it contacts. These properties make it the universal thread sealant of choice across industrial, chemical, and high-purity applications where pipe dope compounds may contaminate process fluids or degrade under chemical exposure.

The 260-inch (approximately 21.6 feet) roll length provides generous coverage for professional use — enough tape for multiple connections per roll without the constant roll-swapping that shorter consumer-grade rolls require on active job sites.

Specifications

Industries & Applications

The Mill-Rose 70891 is the thread sealant specification for professional and industrial threaded connections across a broad range of service conditions:

• Industrial Process Piping — Stainless steel-grade density ensures the tape fills thread voids completely without extruding into the pipe bore or thinning under the torque loads applied to stainless and specialty alloy fittings during assembly.
• Chemical Processing & Fluid Handling — PTFE's universal chemical inertness makes the 70891 the correct sealant choice on threaded connections conveying acids, alkalis, solvents, and oxidizing agents where pipe dope compounds would degrade, contaminate, or react with process fluids.
• High-Pressure Mechanical Systems — Denser formulation resists compression and extrusion under elevated pressure conditions that cause standard white PTFE tape to thin out and allow seepage at the thread root.
• Plumbing & Mechanical Contractors — Professional roll length and mill-grade density make this the working plumber's choice for threaded brass, stainless, and galvanized connections on commercial mechanical systems, boiler rooms, and industrial utility piping.
• Water & Wastewater Treatment — Chemical dosing lines, instrumentation ports, and sample taps in treatment facilities require a thread sealant that will not contaminate process water or degrade in contact with treatment chemicals including chlorine, caustic soda, and sulfuric acid.
• Oil & Gas and Upstream Applications — Heavy-density PTFE tape is standard practice on instrumentation fittings, gauge ports, and threaded process connections in upstream and midstream facilities where joint integrity and chemical compatibility are safety-critical.
• Food & Beverage Processing — PTFE's FDA-recognized inertness makes it appropriate for threaded connections in food-grade piping systems where sealant material contact with process fluids must meet food safety standards.