PTFE / FEP / PFA Heat Shrink Tubing (Fluoropolymer)

PTFE heat shrink tubing is the extreme-duty member of the fluoropolymer family, joined on this page by its two siblings, FEP and PFA. All three share the chemistry that made Teflon famous — chemical inertness to virtually everything, service from -200 °C to +260 °C, dielectric strength above 25 kV/mm, and the lowest friction surface in polymer engineering — but each recovers and behaves differently in production. WELLELE manufactures PTFE / FEP / PFA heat shrink tubing with a 2:1 shrink ratio as standard (other ratios to drawing), in ultra-thin walls down to catheter dimensions and larger sizes for wire and cable protection. If your application involves aggressive chemicals, high continuous temperature, or a cleanliness requirement that rules out PVC and polyolefin, this is the page to specify from. Specifying PTFE heat shrink tubing with the right material grade and recovered ID is a drawing conversation, not a catalogue pick. Orders are drawing-based: material grade, recovered ID, wall and conditioning confirmed before quotation, with FAI and batch traceability on delivery.

PTFE / FEP / PFA at a glance

Property	PTFE (Teflon)	FEP	PFA
Recovery temperature	300–400 °C	180–200 °C	300–375 °C
Operating temperature	-200 °C to +260 °C	-200 °C to +200 °C	-200 °C to +260 °C
Shrink ratio	2:1 standard (custom available)	2:1 standard	2:1 standard
Dielectric strength	≥ 25 kV/mm	≥ 25 kV/mm	≥ 25 kV/mm
Flame retardancy	UL 94 V-0 (unfilled)	UL 94 V-0	UL 94 V-0 (unfilled)
Chemical resistance	All common acids, bases, solvents, fuels	All common acids, bases, solvents, fuels	All common acids, bases, solvents, fluorinated chemicals
Distinctive	Highest temp, lowest friction, opaque	Transparent, melt-bondable, lower recovery temp	High purity, melt-bondable, 260 °C capability
Key standards	ASTM D4896, IEC 60245	IEC 60245	ASTM D5487, IEC 60245

All grades: RoHS and REACH compliant. The full product family data is in the PTFE/FEP/PFA technical datasheet.

PTFE heat shrink tubing: the 260 °C workhorse

PTFE heat shrink tubing recovers at 300–400 °C and serves continuously at -200 °C to +260 °C — the widest service window in the family. It is the specification for:

• Ultra-thin-wall insulation in medical devices and catheters, where the recovered wall is measured in tenths of a millimetre — the most demanding PTFE heat shrink tubing build we produce
• High-temperature wire and cable jacketing in aerospace and industrial heat zones
• Chemical and solvent exposure where polyolefin and PVC degrade — PTFE shrugs off acids, bases and fuels

The trade-off: PTFE cannot be melt-bonded (it does not flow), and its 300–400 °C recovery window needs a controlled heating method. For those two constraints, FEP or PFA are the alternatives.

FEP heat shrink tubing: transparent and melt-bondable

FEP heat shrink tubing recovers at the lowest temperature of the family — 180–200 °C — and serves at -200 °C to +200 °C. Its two practical advantages:

• Transparency: splices and connections stay visually inspectable after shrinking
• Melt-bondability: FEP flows on heating, so it can be welded to itself or to other fluoropolymers for leak-free assemblies

FEP is the pragmatic choice when you want fluoropolymer performance without the 300 °C+ recovery equipment, or when inspection and sealing matter more than the last 60 °C of service temperature. For applications below 200 °C service, FEP heat shrink tubing delivers fluoropolymer performance at the easiest recovery window.

PFA heat shrink tubing: high purity for semiconductors

PFA heat shrink tubing recovers at 300–375 °C and matches PTFE's -200 °C to +260 °C service window, but adds what PTFE cannot offer: melt-processability with the same temperature class. That combination makes PFA the fluoropolymer of choice for:

• High-purity fluid handling in semiconductor wet-process equipment, where ionic contamination and particle generation are disqualifiers
• Chemical processing components that must be welded into leak-free assemblies
• Applications needing PTFE-class temperature resistance plus a smooth, bondable surface

PFA tubing for semiconductor and medical duty is supplied under controlled cleanliness — conditioned, packaged and documented to your spec. PFA heat shrink tubing for high-purity duty is a growing share of our orders, and the cleanliness section below is the part most quotations miss. If your project specifies PFA for purity reasons, tell us at quotation so we apply the corresponding handling and packaging.

Recovery temperature vs service temperature: the spec trap

The most common specification error on PTFE heat shrink tubing and its siblings is confusing recovery temperature with service temperature:

• Recovery temperature (300–400 °C for PTFE and PFA, 180–200 °C for FEP) is the heat applied *once*, during installation, to make the tube shrink. It is not a service rating.
• Service temperature (-200 °C to +260 °C, or +200 °C for FEP) is the continuous operating window of the finished part.

Do not specify "PTFE tubing rated 350 °C" — the 300 °C+ figure only applies during recovery. If your application runs continuously above 260 °C, fluoropolymer heat shrink is the wrong product family entirely, and we will tell you so rather than quote a non-compliant build. Get the recovery/service split right and PTFE heat shrink tubing will outlast the equipment it protects.

Precision, cleanliness and thin walls

• Recovered ID tolerance: held to drawing; typical thin-wall builds hold ±0.05 mm on recovered ID — the precision spec that defines PTFE heat shrink tubing for medical work
• Clean cut ends: square, burr-free cuts for medical and semiconductor assemblies
• Conditioning: PFA and PTFE can be supplied conditioned (cleaned, packed) for cleanroom-introduced parts
• Custom ratios: beyond the 2:1 standard, on a drawing basis

Custom sizes & small batch

Fluoropolymer heat shrink is rarely a catalogue buy: most orders are a specific recovered ID, wall and length. WELLELE quotes from drawing — material grade, ID, OD, wall, conditioning — with small-batch friendly MOQs and 7–10 day express prototypes, so you can qualify a material before committing to production volume. Send the drawing or a marked-up sample via the RFQ form.

Common questions

Engineering Guides & Selection Notes

Related technical articles that help specify this product.

• → PTFE vs FEP vs PEEK Tubing: Chemical and Temperature Tradeoffs
• → PEEK vs PI (Polyimide) vs PTFE: Which High-Temp Tube
• → PTFE vs Silicone Heat Shrink at 260 C