FEP Heat Shrink Tubing 1.3:1

FEP 1.3:1 Heat Shrink Tubing (Fluorinated Ethylene Propylene) is a high temperature, chemical resistant Fluoropolymer tube designed to have a lower shrink temperature than PTFE, but greater flexibility, optical clarity and excellent release properties. FEP Heat Shrink is a common alternative to the higher rated PTFE resins which require 624 F in order to start shrinking. Heat Shrink products made from FEP resins generally can handle temperatures ranging from Cryogenic up to 400 F, but can do so while still keeping an FDA rating on all food contact applications.

Tef Cap can manufacture heat shrink FEP Tubing for custom applications and also produces material to meet Military Specifications as well as heat shrink tubing that is Biocompatible and USP Class VI certified. Heat Shrink FEP Tubing can be produced in standard 4 ft lengths or on spools with long continuous lengths for automated cutting machines. These long spools help eliminate waste and speed up assembly. 

FEP 1.3:1 Heat Shrink Tubing will cover a large range of product sizes but is limited in its shrink ratio. For odd shapes and lengths Tef Cap can also manufacture a custom FEP Heat Shrink Tube designed specifically for your needs.  For a larger shrink ratio please see FEP 1.6:1 Heat Shrink Tubing.

Features of FEP Heat Shrink Tubing

Easier to shrink than PTFE

Max Temperature Range 400° F

Flame Rating : UL 94 VO

Chemically inert

Lower gas and vapor permeability than PTFE

Superior dielectric strength

Excellent UV transmission

Self extinguishing

Fractional & AWG Sizes

Heat Shrink FEP Tubing 1.3:1 Shrink Ratios Colors

FEP 1.3:1 Heat Shrink Tubing AWG

AWG SizeExpanded IDRecovered IDWall ThicknessAMS-DTL-23053/11
AWG +/- .00223053/11-101
AWG +/- .00223053/11-102
AWG +/- .00223053/11-103
AWG +/- .00223053/11-104
AWG +/- .00223053/11-105
AWG +/- .00223053/11-106
AWG +/- .00223053/11-107
AWG +/- .00323053/11-108
AWG +/- .00323053/11-109
AWG +/- .00323053/11-110
AWG +/- .00423053/11-111
AWG +/- .00423053/11-112
AWG +/- .00423053/11-113
AWG +/- .00423053/11-114
AWG 3.310.249.011 +/- .00423053/11-115
AWG 2.365.280.012 +/- .00423053/11-116
AWG 1.400.311.012 +/- .00423053/11-117
AWG 0.440.349.012 +/- .00423053/11-118

FEP 1.3:1 Heat Shrink Tubing Fractional

SizeExpanded IDRecovered IDWallAMS-DTL-23053/11
3/8.500.383.015 +/- .00423053/11-119
7/16.580.448.020 +/- .00423053/11-120
1/2.666.510.020 +/- .00423053/11-121
5/8.830.637.025 +/- .00423053/11-122
3/41.000.764.030 +/- .00423053/11-123
7/81.170.891.035 +/- .00423053/11-124
11.3301.020.035 +/- .00423053/11-126
1 1/81.5001.145.035 +/- .004
1 1/41.6661.270.035 +/- .004
1 3/81.8331.390.035 +/- .004
1 1/22.0001.570.035 +/- .00423053/11-127
Heat Shrink Teflon PTFE Tubing 4:1 Shrink Ratio for odd shapes

FEP 1.3:1 Heat Shrink Tubing

AMS-DTL-23053/11 ( Mil  23053/11 )

Shrink Temperature: 230°F

Temperature Range: -100 to 400°F

Standard Lengths: 4 ft and coils

Color : Translucent ( Colored FEP available upon request )

Reliable Sealed Protection With FEP 1.3:1 Heat Shrinkable Tubing

Tef Cap provides the finest quality FEP 1.3:1 heat shrink tubes. Our products are designed to provide items utmost protection against excess amount of environmental heat. Highly flexible and expandable, these shrink tubes, when subjected to heat, can mold into irregular shapes, providing reliable sealed protection to enclosed items.

Shrinking Instructions

For long wires and tubes start at one end and evenly heat the surface making sure to rotate the part or the heat source so that recovery does not come completely off of one side. Rotating will give you a uniform shrink eliminating air bubbles and keeping the wall even throughout the part. If parts cannot be rotated most heat guns come with a shield or a deflector that can be used in place of rotating. Large metal parts would fare better if they can be pre heated to take the chill off of the part and warm the surface. Over heating the part will cause shrinking to occur prematurely throughout the tube and anywhere the tubing might have come into contact with the hot surface.

Over heating the FEP Tube while shrinking will cause it to crack and become brittle. If this happens the FEP will have a cloudy appearance in spots. Please keep in mind that FEP tubing will ACTUALLY sometimes grow in length during shrinking and that material will bunch and wrinkle if it is not allowed to slide and grow over the part.

Recovery Temperature

SpecificationFEPPTFEDual Wall PTFE/FEPPEEK
Expanded ID < 1.00"410°F +/- 10°662°F +/- 8° for 10 minutes625°F650°F
Expanded ID > 1.00"430°F +/- 10°662°F +/- 8° for 10 minutes625°F650°F
Mil Spec23053/1123053/12N/AN/A