Form-in-Place ePTFE Joint Sealant Tape for Large, Irregular, or Damaged Flanges
Use Liantuo ePTFE joint sealant tape for large, damaged, or non-standard flanges. Widths 3–25 mm, adhesive-backed option, rated −180 °C to +260 °C. Samples from Jiaxing — sales@liantuoptfe.com.
What form-in-place tape is at Liantuo
This product is 100% ePTFE expanded PTFE joint sealant tape in widths 3–25 mm. It is designed for flange faces, not plumber’s thread tape.
If you are comparing the two tapes, start with ePTFE joint sealant tape vs PTFE thread seal tape. This page is the large / irregular / damaged use-case only. The tape product page remains the size-table source.
Where Liantuo tape is first choice
The tape product page lists large vessel openings, damaged or uneven faces, and non-standard shapes — including manways, handholes, and irregular vessel faces. Form-in-place tape follows the face without an oversized cut part.
This guide does not list a minimum flange diameter or a pressure class. Confirm media and flange class with each quote.
Widths and adhesive Liantuo lists
Widths are 3–25 mm in the live table on the tape product page. An adhesive-backed version is available to hold position during assembly.
Temperature window Liantuo lists
Continuous service is listed at −180 °C to +260 °C (the homepage-owned range on the tape product page). Confirm media and flange class with each quote. For chemical notes, see the PTFE chemical resistance chart.
How to apply Liantuo joint sealant tape
Three owned steps from the tape product page:
- Tear the tape to length.
- Overlap the ends 3–5 mm so coverage is continuous.
- Bolt and compress. There is no cure wait. Replace with fresh tape after disassembly (single-use after compression).
This page is not a thread-wrap how-to. For cut-gasket install notes, see ePTFE cut-gasket installation notes.
When to use Liantuo sheet or a cut gasket instead
- Flat, full-face cutting stock: expanded PTFE sheet for flat-face cutting stock, listed at 1–10 mm up to 1520×1520 mm.
- Repeatable finished shapes from a drawing: custom-cut expanded PTFE gaskets from your drawing, with no mold cost.
The stock-versus-cut decision is covered in when to buy ePTFE sheet vs a cut gasket.
Owned chooser (dated 2026-11-11)
Owned facts from Liantuo product pages, re-fetched 2026-11-11. No peer temperature, pressure, or approval figures.
| Scenario | Liantuo product | Why (owned) |
|---|---|---|
| Large, damaged, warped, or non-standard flange; manway / handhole | ePTFE joint sealant tape /expanded-ptfe-tape.html | Form-in-place; no oversized cut part |
| Flat, full-face; shop cutting stock | ePTFE sheet /expanded-ptfe-sheet.html | 1–10 mm stock up to 1520×1520 mm |
| Repeat same-size flanges from a drawing | Custom-cut ePTFE gasket /expanded-ptfe-gasket.html | Finished part; no mold cost |
FAQ
When should I use ePTFE joint sealant tape instead of a cut gasket?
Use the tape on large, damaged, or non-standard flanges, including manways and irregular vessel faces. Use a custom-cut gasket when you have a drawing for a repeatable flat shape.
What widths and temperatures does Liantuo list?
Widths 3–25 mm, with an adhesive-backed option. Continuous service is listed at −180 °C to +260 °C. Confirm media and flange class with each quote.
How much should I overlap the ends?
Overlap 3–5 mm at the circumference joint so coverage is continuous. After compression under bolt load, replace with fresh tape at the next assembly.
Is this the same as PTFE thread seal tape?
No. Thread seal tape is thin dense PTFE for pipe threads. This product is thicker ePTFE for flange faces. See the joint-sealant-vs-thread-tape guide.
How do I request a sample?
Email sales@liantuoptfe.com with flange size or width, adhesive yes or no, media and temperature if known, quantity, and ship-to. Samples are available from Jiaxing.
Quote path at Liantuo
Samples are available from Jiaxing. Email sales@liantuoptfe.com with flange size or preferred width, adhesive yes or no, media and temperature if known, rolls or meters, and ship-to.
Email sales@liantuoptfe.com to request a quote or samples.
Also see Technical Resources.