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Five black heat-shrink tubes, 48 in each, thin wall adhesive lined 3:1 ratio

3M

3M EPS300 3/4 in Black Heat Shrink Tubing 48 in 5 pcs

SKU CH-EDYH-B5QWX

Adhesive-lined polyolefin tubing shrinks 3:1 to seal 4 AWG to 3/0 AWG wires from -67 °F to 230 °F

  • Adhesive-lined seal protects connections against moisture
  • 3:1 shrink ratio fits wire sizes from 4 AWG to 3/0 AWG
  • Flame-retardant polyolefin withstands -67 °F to 230 °F
  • Abrasion- and chemical-resistant wall adds mechanical durability
  • 48-inch sticks in a five-piece pack cover multiple repairs

What it is and who needs it

3M EPS300 adhesive-lined heat-shrink tubing in black provides a 3:1 shrink ratio for sealing wire splices and terminations. Each piece measures 48 in before shrinking and reduces from 0.75 in to 0.25 in inside diameter. The polyolefin wall finishes at 0.09 in thick and resists abrasion, acids and alkalis. It suits electricians and technicians protecting connections from 4 AWG to 3/0 AWG in harsh environments.

Installation ease and common issues

A heat gun capable of at least 250 degrees F activates the adhesive liner and shrinks the tubing evenly. Apply heat gradually around the joint to avoid cold spots that leave the seal incomplete. The thin wall conforms quickly but can split if overheated past 230 degrees F or if the wire bundle exceeds the 0.75 in pre-shrink diameter. Ensure the surface is clean so the adhesive bonds properly.

Capacity and headroom

The 3:1 ratio covers a wide range of wire sizes from 4 AWG up to 3/0 AWG with a single tubing size. After shrinking, the 0.25 in inside diameter and 0.09 in wall thickness deliver a durable, moisture-resistant seal. The material remains flexible across a -67 to 230 degrees F temperature range. It will not accommodate bundles larger than the 0.75 in supplied diameter or applications requiring a heavier wall.

How it compares

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

Price $110.99
Pricier than about 56% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand name3M

Questions about this item

How can I confirm the tubing has shrunk correctly after heating?

When fully shrunk the inside diameter measures .25 in and the wall thickness .09 in; the adhesive should have melted and sealed the joint.

What comes in the package and do I need anything else?

The box contains five black pieces each 48 in long; you only need a heat source that reaches at least 250 Degrees F.

Which shrink ratio and size suit 4 AWG to 3/0 AWG wire?

This tubing has a 3:1 ratio, starts at .75 in ID and finishes at .25 in ID, matching the stated wire range.

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