ePTFE Joint Sealant Tape vs PTFE Thread Seal Tape — Two Different Liantuo Products
Liantuo ePTFE joint sealant tape is a form-in-place flange sealant in widths 3–25 mm. PTFE thread seal tape is thin, dense virgin PTFE for pipe threads (0.075–0.10 mm). Do not substitute one for the other.
Two Liantuo tapes, two jobs
Liantuo sells two tapes that buyers often search as “PTFE tape,” and they are not the same product.
- expanded PTFE joint sealant tape for flange faces is a form-in-place sealant applied to flange faces.
- PTFE thread seal tape for pipe threads is a thin film wrapped on male pipe threads.
Use this page to pick the correct SKU. For wrapping method, see how to wrap PTFE thread seal tape. For large or damaged flanges, see form-in-place ePTFE tape for large or damaged flanges.
Structure and size of the two Liantuo tapes
Joint sealant tape is 100% expanded PTFE, with no fillers or binders listed on the product page. Widths are 3–25 mm. An adhesive-backed version is available to hold position during assembly. Thickness in the live width table is 1.5–10 mm and varies by width.
Thread seal tape is 100% virgin PTFE, unfilled, and a dense solid — not expanded and not porous. Thickness is 0.075–0.10 mm. Widths are 3 / 6 / 12 / 19 / 25 mm, with roll lengths listed on the thread-tape product page.
Temperature windows on the two Liantuo tapes
Do not mix the published ranges.
- Joint sealant tape is listed at −180 °C to +260 °C.
- Thread seal tape is listed at −200 °C to +260 °C.
Confirm the media, and the rest of the duty, with each quote. For chemical notes, see the PTFE chemical resistance chart.
Owned comparison (dated 2026-11-11)
Owned facts from the two Liantuo product pages, re-fetched 2026-11-11. No peer approvals or extra pressure figures.
| Attribute | ePTFE joint sealant tape /expanded-ptfe-tape.html | PTFE thread seal tape /thread-seal-tape.html |
|---|---|---|
| Material (as stated) | 100% expanded PTFE; no fillers or binders | 100% virgin PTFE, unfilled; dense solid — not expanded, not porous |
| Form | Form-in-place roll for flange faces | Thin film wrapped on male pipe threads |
| Width | 3–25 mm (table on the product page) | 3 / 6 / 12 / 19 / 25 mm |
| Thickness | 1.5–10 mm in the live width table (varies by width) | 0.075–0.10 mm |
| Temperature (owned) | −180 °C to +260 °C | −200 °C to +260 °C |
| Adhesive | Adhesive-backed version available | Not listed as an adhesive-backed flange tape |
| After disassembly | Replace with fresh tape (single-use after compression) | Re-wrap threads on reassembly (application practice on the product page) |
When not to substitute one Liantuo tape for the other
Thread seal tape is not a flange gasket. Joint sealant tape is not plumber’s wrap. The thread-tape product page already states that the two products are not interchangeable; this guide is the side-by-side comparison.
If the job is a large, irregular, or damaged flange, do not stretch thread tape across the face. Use form-in-place ePTFE tape for large or damaged flanges.
FAQ
Is ePTFE joint sealant tape the same as PTFE thread seal tape?
No. Liantuo joint sealant tape is 100% ePTFE for flange faces, in widths 3–25 mm. Thread seal tape is thin, dense virgin PTFE (0.075–0.10 mm) for pipe threads. Do not substitute.
Which tape do I use on a flange?
Use expanded PTFE joint sealant tape. See the joint sealant tape product page for widths, the adhesive-backed option, and the −180 °C to +260 °C window.
Which tape do I use on pipe threads?
Use PTFE thread seal tape. See the thread seal tape product page for widths, thicknesses, and the −200 °C to +260 °C range.
Can I get samples?
Yes. Email sales@liantuoptfe.com with the product (joint sealant or thread tape), size, quantity, media and temperature if known, and ship-to country. MOQ is confirmed with each quote.
Samples and a Liantuo quote
Samples are available. For joint sealant tape, the product page states samples from Jiaxing.
Email sales@liantuoptfe.com with the product (joint sealant or thread tape), size, quantity, media and temperature if known, and ship-to country. MOQ is confirmed with each quote.
Email sales@liantuoptfe.com to request a quote or samples.
Also see Technical Resources.