Pre-cut gaskets often create problems when dealing with irregular flanges, damaged sealing surfaces, or non-standard equipment. Keeping multiple gasket sizes in stock increases inventory costs, while custom orders can delay maintenance.
Expanded PTFE joint sealant tape provides an on-site sealing solution. It can be cut to the required length and installed directly on the flange, conforming to rough, pitted, and uneven surfaces with low bolt torque. One roll replaces multiple gasket sizes, reducing waste and eliminating long waiting times for custom gaskets.
Performance range: -196°C to +200°C temperature resistance, up to 80 bar liquid pressure / 15 bar gas pressure, and pH 0–14 universal chemical resistance.
For maintenance teams and equipment manufacturers, ePTFE joint sealant tape delivers flexible installation, simplified inventory, and reliable sealing performance. Contact Taifno today to get a factory direct quotation!
Expanded PTFE Joint Sealant Tape is a continuous sealing material produced from 100% pure PTFE resin through an advanced expansion process. The resulting micro-porous structure gives the tape excellent flexibility, compressibility, and surface adaptability, allowing it to function as a custom-made gasket for various flange shapes and sizes.
The installation process is simple:
1. Cut to Fit: The tape can be cut according to the required length, making it suitable for different flange diameters, covers, manways, and irregular sealing areas.
2. Position Easily: The tape is placed directly on the sealing surface, with optional self-adhesive backing helping maintain its position during installation.
3. Compress and Seal: After flange tightening, the expanded PTFE structure compresses to form a uniform sealing layer that adapts to surface imperfections and maintains sealing performance.
Conforms to uneven surfaces while providing reliable sealing under low bolt loads.
Contains no fillers or additives, ensuring excellent chemical resistance and preventing contamination.
Self-adhesive options simplify application, especially on vertical or difficult-to-access surfaces.
Remains flexible at cryogenic temperatures down to -196°C and maintains stability under demanding conditions.
Resists cold flow better than conventional PTFE materials, helping maintain long-term sealing reliability.
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Problem |
How ePTFE Tape Solves It |
|
Hundreds of gasket sizes to stock |
One roll replaces thousands of pre-cut gaskets |
|
Custom shapes take too long |
Cut to length on-site — no waiting |
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Damaged or warped flanges leak |
Soft, conformable material fills scratches, pits, and irregularities |
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Cut gaskets waste material |
Cut exactly what you need, zero waste |
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Fragile flanges crack under high torque |
Seals with low bolt pressure, ideal for glass-lined and plastic flanges |
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Costly downtime waiting for gaskets |
Immediate availability, no waiting for custom cutting |
|
Feature |
ePTFE Tape |
Pre-Cut Gaskets |
Conventional PTFE Sheet |
|
Inventory |
One roll — replaces hundreds of sizes |
Every size must be stocked |
Multiple thicknesses and sizes |
|
Custom Shapes |
Cut on-site — fits any shape |
Requires custom tooling or waiting |
Must be cut from sheet |
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Conformability |
★★★★★ fills scratches and pits |
★☆☆☆☆ rigid |
★☆☆☆☆ rigid |
|
Cold Flow |
✅ No creep |
N/A |
❌ Creeps under load |
|
Temperature |
-196°C to +200°C |
Depends on material |
-180°C to +200°C |
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Chemical Resistance |
pH 0-14 — universal |
Depends on material |
pH 0-14 |
|
FDA Compliant |
✅ Yes |
Depends on material |
Depends on grade |
|
Waste |
Zero |
Significant |
Significant |
|
Total Cost |
Lowest |
Highest |
Moderate |
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If Your Application Is... |
Choose... |
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Damaged, scratched, or warped flanges |
ePTFE Tape — fills irregularities |
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Glass-lined, ceramic, or plastic flanges |
ePTFE Tape — low bolt pressure |
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Large-diameter flanges (over 24") |
ePTFE Tape — no custom gasket waiting |
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Odd-shaped or non-standard flanges |
ePTFE Tape — cut to fit any shape |
|
Clean, smooth flanges, standard sizes |
Pre-cut gaskets |
|
Industry |
Application |
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Chemical Processing |
Pipe flanges, reactor covers, heat exchangers — acids, solvents |
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Pharmaceutical |
Sterile equipment, bioreactors — FDA compliance |
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Food & Beverage |
Sanitary connections, filling equipment — FDA compliance |
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Pulp & Paper |
Large diameter flanges, digesters — thermal cycling |
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Power Generation |
Steam systems, condenser flanges — high temperature |
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Glass-lined Equipment |
Reactors, vessels — fragile surfaces, low torque |
Challenge: A chemical plant stocked 100+ gasket sizes for 20+ flange sizes. Inventory was expensive and space-consuming. Non-standard flanges caused days of downtime waiting for custom gaskets.
Solution: Replaced all cut gaskets with expanded PTFE joint sealant tape. Stocked 5 tape sizes instead.
Result: Inventory cost reduced by 80%. Downtime reduced from days to hours. One tape size covered multiple flange sizes.
Challenge: A pharmaceutical plant was cracking glass-lined reactor covers due to high torque required to seal rigid PTFE gaskets.
Solution: Switched to Expanded PTFE Joint Sealant Tape with self-adhesive backing. Low bolt pressure required — eliminated stress on the glass lining. Tape conformed perfectly to the wavy glass surface.
Result: Zero glass lining damage. Perfect seal with lower torque. Installation faster and simpler — tape stayed in position during assembly. No replacements in 18 months.
Note: Actual case results vary by application conditions. Contact us for application-specific recommendations.
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Parameter |
Value |
|
Temperature Range — Continuous |
-196°C to +200°C |
|
Temperature Range — Short-Term |
Up to +315°C |
|
Pressure — Liquid |
Up to 80 bar |
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Pressure — Gas |
Up to 15 bar |
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pH Range |
0-14, universal chemical resistance |
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Density |
0.6 to 0.8 g/cm³ |
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Compressibility |
60-70% |
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Recovery |
5-10% |
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Material |
100% Virgin PTFE (expanded) |
|
Self-Adhesive Backing |
Available |
|
FDA Compliant |
Yes, meets FDA 21 CFR 177.1550 |
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Shape |
Size Range |
Common Applications |
|
Rectangular Tape |
Width 3mm to 50mm × Thickness 1.5mm to 7mm |
Standard flange sealing |
|
Round Cord |
Diameter: 1 mm to 16mm |
Valve packing, narrow grooves |
100% Virgin PTFE Resin — no regrind, no recycled material. Consistent quality.
Full Traceability — Every batch traceable. Material certificates on request.
FDA-Compliant — Meets FDA 21 CFR 177.1550 for food and pharmaceutical applications.
TA Luft Certified — Available grades meet German clean air requirements.
Long Shelf Life — Unlimited — no degradation over time.
A: It is a soft, flexible sealing tape made from 100% expanded PTFE. Cut it to length on-site and press it onto the flange face. Seals on rough, pitted, or warped flanges with low bolt torque, where pre-cut gaskets leak. One roll replaces hundreds of sizes.
When to use it: Irregular surfaces, damaged flanges, non-standard sizes, large-diameter flanges, glass-lined/plastic flanges requiring low torque.
When NOT to use it: High-pressure dynamic sealing (moving parts), static seal only.
Pressure limits: Liquid service up to 80 bar; gas service up to 15 bar.
A: Cost depends on width, thickness, length per roll, and quantity. A single roll typically costs less than stocking 10 different gasket sizes.
Total cost view: The tape costs more per meter than standard gasket sheet. But you cut exactly what you need, zero waste, zero waiting, zero custom tooling. Over a year, inventory, downtime, and waste savings exceed the material cost.
Lead time:
In stock: ships within 24-48 hours.
Shipping: air 5-10 days, sea 15-30 days.
Send us your size and application, we quote within 24 hours.
A: Temperature: -196°C to +200°C.
Pressure: up to 80 bar (liquid), 15 bar (gas).
Chemical: pH 0-14. universal resistance, except molten alkali metals and fluorine.
Three common mistakes:
(1) Wrong size: for smooth flanges, tape width should be approximately the full gasket contact area; for rough surfaces, use wider tape or double-up.
(2) Over-tightening: ePTFE tape seals with low torque; over-tightening damages the tape.
(3) No overlap: ends should overlap by 10-20mm, cut at 45° for a tapered joint.
Self-adhesive tip: Peel backing film and press firmly onto the flange surface, it stays in position during assembly.
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No.1028, Qiersan Street, Andong Town, Cixi City, Zhejiang Province, China
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