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Black adhesive-lined heat shrink tubes, twelve pieces, 48 inch length, 3/8 inch diameter before shrinking

3M

3M EPS300 3/8" 48" Black 12 PCS Adhesive Lined Heat Shrink Tube

SKU CH-NB3Z-K57J7

Adhesive-lined polyolefin heat-shrink tubing with a 3:1 shrink ratio, shrinking from .38 in to .12 in to seal and protect 12–8 AWG wires

  • 3:1 shrink ratio fits 12–8 AWG wires
  • Adhesive lining seals out moisture and corrosion
  • Flame-retardant polyolefin withstands –67 °F to 230 °F
  • Abrasion and chemical resistant for harsh environments
  • 12 pieces × 48 in ready for immediate use

Product Identity

This is a pack of twelve black adhesive-lined heat-shrink tubes from 3M. Each piece measures forty-eight inches long and suits wire sizes from 12 AWG to 8 AWG. The polyolefin material is flexible, flame-retardant and abrasion-resistant.

Compatibility Check

Verify that the conductor fits inside the 0.38 inch pre-shrink diameter and that the final 0.12 inch diameter will seal the connection. Ensure your heat source can reach at least 250 degrees Fahrenheit for full recovery.

Upgrade Context

Replaces standard thin-wall tubing without adhesive when environmental sealing is required. The 3:1 shrink ratio and acid-alkali resistance make the jump worthwhile for harnesses exposed to moisture, chemicals or vibration.

How it compares

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

Price $156.99
Pricier than about 70% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M

Questions about this item

What comes in the box and do I need any extra tools to use it?

The package contains twelve individual pieces of black adhesive-lined heat shrink tubing, each four feet long. You will need a heat source capable of reaching at least 250 degrees F to activate the shrink and adhesive.

How do I choose the right size for my wires?

This tubing is designed for wire sizes from 12 AWG to 8 AWG. It starts at an inside diameter of .38 in and shrinks to .12 in with a 3:1 ratio, so ensure your wire bundle fits within that range before and after shrinking.

What does the 3:1 shrink ratio mean once the tubing is on the wire?

A 3:1 ratio means the tubing shrinks to one-third of its original .38 in diameter, reaching a recovered inside diameter of .12 in and a wall thickness of .06 in, creating a tight, sealed fit over the connection.

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