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Black flexible polyolefin heat-shrink tubing on a 100 ft spool, 1 in diameter before shrink

3M

3M FP301-1 Heat Shrink Tubing 1 in ID 100 ft Black

SKU CH-Y90R-SB3RR

Flexible polyolefin tubing shrinks 2:1 from 1 in to .5 in, covering 4/0 AWG to 500 MCM wire over 100 ft with flame-retardant, acid-resistant walls rated to 600 V

  • 2:1 shrink ratio fits 4/0 AWG to 500 MCM wires
  • 100 ft continuous length enables custom cut-to-length pieces
  • Flame-retardant polyolefin resists acids, alkalis and solvents
  • Operating range from -67 °F to 275 °F suits harsh environments
  • 600 V dielectric strength protects electrical connections

3M FP301-1 Heat Shrink Tubing 1 in ID 100 ft Black

This 100 ft spool of 3M FP301-1 heat shrink tubing is designed for electrical insulation and strain relief on wire sizes ranging from 4/0 AWG to 500 MCM. It suits electricians, automotive technicians and maintenance crews who need reliable, flexible polyolefin sleeving for cable repairs, harnessing and environmental sealing in professional installations.

Thermal behaviour and electrical rating

The tubing carries a dielectric strength of 600 V and operates continuously across a temperature range of -67 Degrees to 275 Degrees F. Its thin-wall polyolefin construction is flame retardant and resistant to acids, alkalis and common solvents, ensuring stable insulation performance without adding significant bulk or weight to the wire bundle.

Sustained load performance

When heated to the minimum shrink temperature of 212 Degrees F, the 2:1 ratio reduces the inside diameter from 1 in to .5 in with a recovered wall thickness of .04 in. The material maintains its mechanical and dielectric properties throughout extended thermal cycling and prolonged exposure to the upper end of its rated temperature range.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $337.99
Pricier than about 90% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M

Questions about this item

How do I install the 3M FP301-1 heat shrink tubing, and what step do people often miss?

Slide the tubing over the wire before making the connection, then apply heat evenly until it shrinks to .5 in ID. The step often missed is heating uniformly around the full circumference so the .04 in wall seals without gaps.

What maintenance or replacement will the 3M FP301-1 heat shrink tubing need later?

The polyolefin tubing is acid, alkali and solvent resistant with no adhesive liner, so it requires no scheduled maintenance. Replace only if physical damage cuts the .04 in wall or the 600 V dielectric rating is compromised.

What limit appears first on the 3M FP301-1 heat shrink tubing under sustained use?

Continuous exposure above 275 °F exceeds the rated temperature range, causing the material to degrade before the 2:1 shrink ratio or 600 V dielectric strength would be reached in normal service.

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