Overview
The Grainger 21TF49 is an Anti-Seize Technology PTFE joint sealant tape designed for general-purpose thread and flange sealing. This white gasket-making tape uses 100% expanded PTFE/UHF material with self-adhesive backing, eliminating the need for additional adhesives or wrap-around thread compound. Ideal for maintenance technicians, plumbers, and system integrators, the 21TF49 delivers consistent, dependable seals across a wide temperature range.
Key Features
- 100% expanded PTFE/UHF gasket material resists common chemicals and does not deteriorate with age
- Self-adhesive tape on one side enables quick application—cut with scissors and apply directly to sealing surface
- Highly compressible ribbon fills severe irregularities in worn sealing surfaces
- Soft, pliable construction conforms easily to flange and thread profiles
- Meets FDA 21 CFR 177.1550 and 21 CFR 175.105 for food and beverage contact
- CSA Recognized Component for compliance in regulated applications
Technical Specifications
- Width: 1/2 inch
- Length: 15 feet (180 inches)
- Material: 100% Expanded PTFE
- Color: White
- Temperature Range: -450°F to 600°F
- Maximum Pressure (liquids): 3,000 psi
- Maximum Pressure (gases): 3,000 psi
- Backing: PTFE with self-adhesive coating
- Type: Joint Sealant Tape / Gasket-Making Tape
- Application: General Purpose Thread Sealing
- Certifications: FDA 21 CFR 177.1550, FDA 21 CFR 175.105, CSA Recognized Component
Typical Applications
- Pipe thread sealing on metal tubing and fittings
- Flange gasket replacement for valves, pumps, and manifolds
- Sealing service connections and equipment joints
- Food and beverage processing equipment where FDA compliance is required
- Oil, gas, and chemical processing where chemical resistance is critical
- Plumbing and HVAC system connections
- Industrial maintenance and repair of worn gasket surfaces
Compatibility & Replacements
Compatible With
- All metal piping systems (copper, steel, stainless steel)
- Brass and bronze fittings
- Plastic piping (most thermoplastics; verify compatibility with specific plastic type)
- Flanges on industrial pumps, compressors, and valve bodies
- Heat exchangers and pressure vessels
Replaces / Drop-In Replacement For
- Traditional cut gaskets in flange applications
- Wrapped PTFE tape joint sealants
- Poly-Temp® copper tape applications where food-grade sealing is not critical
- Generic expanded PTFE gasket tape products of same width and pressure rating
Works With
- Manual scissors or utility knife cutting tools
- All standard plumbing and industrial pipe thread compounds (compatible but not required due to self-adhesive backing)
- Existing flange bolt assemblies and quick-disconnect systems
- Any application within the -450°F to 600°F temperature envelope and 3,000 psi pressure limit
