PTFE/FEP Dual Wall Shrink Tubing
Combines the Best of PTFE and FEP Into One Heat Shrink Tube
What's special about PTFE/FEP Dual Wall?
- Combines the tight sealing ability of the PTFE with the moisture-proof seal of FEP
- Provides the ultimate protection for wires, connectors, and splices
- High operating temperature (232° C / 450° F) for extreme conditions
- Also offers great electrical, chemical, and mechanical properties
- Click for More Features
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DUAL WALL - STANDARD
Please call for immediate availability. 3 week ship time if not in stock.
Sold in 4ft sticks
| Part # | Nominal Size | Minimum ID Supplied |
Minimum ID Shrunk |
Wall Thickness Shrunk |
Price |
|---|---|---|---|---|---|
| HSTFEDS-SW-0160 | 3/32" (0.0938") | 0.160" | Does Not Shrink | 0.032" | |
| HSTFEDS-SW-0190 | 3/16" (0.1875") | 0.190" | 0.095" | 0.035" |
DUAL WALL - LIGHTWEIGHT
Please call for immediate availability. 3 week ship time if not in stock.
Sold in 4ft sticks
| Part # | Nominal Size | Minimum ID Supplied |
Minimum ID Shrunk |
Wall Thickness Shrunk |
Price |
|---|---|---|---|---|---|
| HSTFEDS-LW-0065 | 1/16" (0.0625") | 0.065" | Does Not Shrink | 0.015" | |
| HSTFEDS-LW-0130 | 1/8" (0.125") | 0.13" | 0.060" | 0.015" | |
| HSTFEDS-LW-0240 | 1/4" (0.2500") | 0.240" | 0.150" | 0.020" | |
| HSTFEDS-LW-0700 | 3/4" (0.7500") | 0.700" | 0.500" | 0.040" | |
| HSTFEDS-LW-0115 | 3/32" (0.0938") | 0.115" | 0.045" | 0.015" |
Our PTFE heat shrink tubing is also available with a "dual-wall" construction. It is constructed with an outer layer of heat shrinkable PTFE and an inner layer of FEP. It is easy to apply, and is designed to provide a tight, moisture-proof bond over wires, cable, connectors, splices, terminal, etc. During application, the PTFE shrinks tightly over inserted parts, while the inner layer of FEP melts and flows to encapsulate parts and provides a tight moisture-proof seal.
DIMENSIONS (inches)
| STANDARD WALL | LIGHTWEIGHT WALL | ||||||
| Part # | As Supplied I.D. Min. |
Recovered Dim. I.D. Will Shrink To at Least |
After Shrinking Total Wall Thickness-Norm. |
Item No. | As Supplied I.D. Min. |
Recovered Dim. I.D. Will Shrink To at Least |
After Shrinking Total Wall Thickness-Norm. |
| Not Available | 0.036 | 0.000 | N/A | HSTFEDS-LW-0065 | 0.065 | 0.000 | N/A |
| HSTFEDS-SW-0060 | 0.060 | 0.000 | N/A | HSTFEDS-LW-0115 | 0.115 | 0.045 | 0.015 |
| Not Available | 0.130 | 0.000 | N/A | HSTFEDS-LW-0130 | 0.130 | 0.060 | 0.015 |
| HSTFEDS-SW-0160 | 0.160 | 0.000 | N/A | HSTFEDS-LW-0180 | 0.180 | 0.065 | 0.015 |
| HSTFEDS-SW-0190 | 0.190 | 0.062 | 0.035 | HSTFEDS-LW-0190 | 0.190 | 0.070 | 0.015 |
| HSTFEDS-SW-0250 | 0.250 | 0.125 | 0.035 | HSTFEDS-LW-0240 | 0.240 | 0.150 | 0.020 |
| HSTFEDS-SW-0350 | 0.350 | 0.190 | 0.035 | HSTFEDS-LW-0350 | 0.350 | 0.210 | 0.025 |
| HSTFEDS-SW-0450 | 0.450 | 0.312 | 0.055 | HSTFEDS-LW-0480 | 0.480 | 0.315 | 0.032 |
| HSTFEDS-SW-0700 | 0.700 | 0.440 | 0.055 | HSTFEDS-LW-0700 | 0.700 | 0.500 | 0.040 |
| HSTFEDS-SW-0950 | 0.950 | 0.630 | 0.065 | HSTFEDS-LW-1000 | 1.000 | 0.700 | 0.045 |
METRIC DIMENSIONS (mm)
| STANDARD WALL | LIGHTWEIGHT WALL | ||||||
| Part # | As Supplied I.D. Min. |
Recovered Dim. I.D. Will Shrink To at Least |
After Shrinking Total Wall Thickness-Norm. |
Item No. | As Supplied I.D. Min. |
Recovered Dim. I.D. Will Shrink To at Least |
After Shrinking Total Wall Thickness-Norm. |
| Not Available | 0.91 | 0.000 | N/A | HSTFEDS-LW-0065 | 1.65 | 0.000 | N/A |
| HSTFEDS-SW-0060 | 1.52 | 0.000 | N/A | HSTFEDS-LW-0115 | 2.92 | 1.14 | 0.38 |
| Not Available | N/A | N/A | N/A | HSTFEDS-LW-0130 | 3.30 | 1.52 | 0.38 |
| HSTFEDS-SW-0160 | 4.06 | 0.000 | N/A | HSTFEDS-LW-0180 | 2.92 | 1.65 | 0.38 |
| HSTFEDS-SW-0190 | 4.83 | 1.57 | 0.89 | HSTFEDS-LW-0190 | 4.83 | 1.78 | 0.38 |
| Not Available | N/A | N/A | N/A | HSTFEDS-LW-0240 | 6.10 | 3.81 | 0.51 |
| HSTFEDS-SW-0350 | 8.89 | 4.83 | 0.89 | HSTFEDS-LW-0350 | 8.89 | 5.33 | 0.64 |
| HSTFEDS-SW-0450 | 11.43 | 7.92 | 1.40 | HSTFEDS-LW-0480 | 12.19 | 8.00 | 0.81 |
| HSTFEDS-SW-0700 | 17.78 | 11.18 | 1.40 | HSTFEDS-LW-0700 | 17.78 | 12.70 | 1.02 |
| HSTFEDS-SW-0950 | 24.13 | 16.00 | 1.65 | HSTFEDS-LW-1000 | 25.40 | 17.78 | 1.14 |
Related Articles
How-To Corner
Limiting Oxygen Index (LOI)
The ratio of how much oxygen - as compared to other gases - needs to be present in the air surrounding a particular material in order for that material to burn. The fact that Earth's normal atmospheric air contains around 21% oxygen is used a reference point when materials are classified into burn categories that are based on Limiting Oxygen Index. Substances that are combustible in air containing less than 21% oxygen are considered flammable, while those that burn in the range of anything greater than 21% but less than 28% are typically labeled "slow burning". Any material with an LOI that exceeds 28% is classified as self-extinguishing.
In the table below, you'll find a list of polymers commonly found in our heat shrink tubing and braided sleeving products, along with their LOIs and the burn categories each falls into.
| MATERIAL | ALTERNATE NAME | LOI | CATEGORY |
| ECTFE (Ethylene chlorotrifluoroethylene) | Halar | 64% | Self Extinguishing |
| Nomex | N/A | 28% | Slow Burning |
| Nylon 6:6 | N/A | Ranges fron 24-29% | Slow Burning to Self Extinguishing |
| PET (Polyethylene Terephthalate) | Mylar (film), Dacron (fiber) | Ranges from 21-34% | Slow Burning to Self Extinguishing |
| Polyethylene (PE) | N/A | 17% | Flammable |
| Polypropylene (PP) | polythene (in the UK) | 17% | Flammable |
| Polytetrafluoroethylene (PTFE) | Teflon | 95% | Self Extinguishing |
| Polyvinyl Chloride (PVC) | N/A | Ranges from 45-49% | Self Extinguishing |
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