Part # Shrink Ratio  Material  Min Supplied ID  Max Recovered ID  Nom Recovered Wall  Temperature  Ratings 
FIT-621-2 6:1  Mod XLPO w/Sealant  0.33  0.105  -55 to 90  CA Prop 65, RoHS 
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1) Tubing Type Adhesive Lined Heat Shrinkable Tubing
2) Tubing Material Dual Wall Flexible PO w/Thick Wall Adhesive
3) Minimum Supplied ID(In) 2.000
4) Maximum Recovered ID(In) 0.374
5) Minimum Recovered Adhesive Wall Thickness(In) 0.106
6) Color(s) BLACK
1) EU Directive 2011/65/EU(RoHS2):
 All materials used in the manufacture of this part are in compliance with European Directive 2011/65/EU regarding the restriction of use of certain hazardous substances in electrical and electronic equipment.
2) REACH Regulation (EC 1907/2006):
 This product does not contain Substances of Very High Concern (SVHC) listed on the European Union's REACH candidate list in excess of 0.1% mass of the item.
3) California Proposition 65:The outer surface materials used in the manufacture of this part meet the requirements of California Proposition 65.
Physical & Mechanical Properties
1) Temperature Range -55 to 90°C 
2) Shrink Ratio Approximately 5.6:1 
3) Full Recovery Temperature 121°C 
4) Tensile Strength 1200psi, Min ASTM D638
5) Elongation 200%, Min ASTM D638
6) Low Temperature Flex(-55°C) no cracking AMS-DTL-23053
7) Heat Resistance(175°C,168hrs) 100% Elongation, Min ASTM D638
8) Heat Shock(225°C,4hrs) no cracking AMS-DTL-23053
9) Secant Modulus 2.5x10 4 psi, Min ASTM D882
10) Longitudinal Change -10% AMS-DTL-23053
11) Specific Gravity 1.40, Max ASTM D792
12) Shelf Life 25 Years @ 18 to 35°C 
Electrical Properties
1) Dielectric Strength 200 V/mil, Min ASTM D876
2) Volume Resistivity 1x10 13 ohm-cm, Min ASTM D876
3) Dielectric Constant 3.1 IEC 250
Chemical Properties
1) Water Absorption 0.50%, Max ASTM D570
2) Corrosion(175°C,16hrs) no corrosion AMS-DTL-23053
3) Fluid Resistance(23°C,24 Hrs) 750 PSI, Min AMS-DTL-23053
4) Fungus Resistance Pass AMS-DTL-23053
5) Halogen Free Yes 
6) Lead Free Yes 
10X6 IN, 3X6 IN

Our FIT heat-shrink tubing offers a reliable way to protect and seal terminations or add additional mechanical ruggedness. FIT preferred heatshrink products are made from premium compounds under the tightest manufacturing controls. This means FIT will consistently have excellent physical characteristics such as low longitudinal shrinkage and wide temperature ranges while providing an elegant appearance when used alone or on OEM equipment.

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