Best Black Heat Shrink Tubing for 35 Mm Cable (2026)

A solder joint on a trailer harness sits bare after the old tape peels back, and the wires underneath need a sleeve that grips tight and keeps moisture out. The fix is a short length of tubing slid over the joint and shrunk down with a heat gun. This guide compares the best black heat shrink tubing for 35 mm cable, four black kits ranked by shrink ratio, size range, adhesive liner and stated insulation.

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Picks for the garage

#	Product	Shop Score	Buy
1	innhom 650pcs Heat Shrink Tubing Black Heat Shrink	9.6/10	Buy on Amazon
2	360 Pcs Heat Shrink Tubing Kit	9.6/10	Buy on Amazon
3	Rindion 127PCS Heat Shrink Tubing Kit	9.4/10	Buy on Amazon
4	Luomorgo 3/8 Inch Heat Shrink Tubing 25FT	9.4/10	Buy on Amazon

1

innhom 650pcs Heat Shrink Tubing Black Heat Shrink

innhom·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 650 piece black kit in 8 sizes, from 1/24 to 2/5 in, with a 2:1 shrink ratio, a minimum shrink temperature of 70 degrees C, and a dielectric strength over 20 kV per mm stated.

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Pros

• 650 pieces in 8 sizes, from 1/24 to 2/5 in
• Dielectric strength over 20 kV per mm stated
• Tensile strength 14 Mpa and elongation over 400 percent stated
• Flame retardant material in a storage case

Cons

• No warranty term is stated
• No adhesive liner is stated
• Largest tube is 2/5 in
• Single length of 1 4/7 in for every piece

2

360 Pcs Heat Shrink Tubing Kit

HRYSPN·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 360 piece kit in black and red, in 7 sizes from 3/32 to 3/4 in, with a 4:1 shrink ratio, precut 1.77 in pieces, and an adhesive liner that seals as the tube shrinks.

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Pros

• 4:1 shrink ratio, the widest range here
• Adhesive liner seals the joint as it shrinks
• 7 sizes from 3/32 to 3/4 in, precut to 1.77 in
• Dual-wall tubing resists abrasion, heat and pulling stress

Cons

• No warranty term is stated
• Kit mixes black and red pieces
• No dielectric or tensile figures are stated
• 360 pieces, fewer than the innhom kit

3

Rindion 127PCS Heat Shrink Tubing Kit

Rindion·9.4/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 127 piece marine grade kit in 7 sizes, from 3/64 to 33/64 in, with a 2:1 shrink ratio and a heat gun range of 80 to 125 degrees C stated.

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Pros

• 127 pieces in 7 sizes, from 3/64 to 33/64 in
• Marine grade PE with stated electrical insulation
• Shrinks to half its diameter with a heat gun from 80 to 125 degrees C
• Suits motorcycles, trucks, boats and solar panels

Cons

• No warranty term is stated
• No adhesive liner is stated
• No single piece length is stated
• No weight is stated

4

Luomorgo 3/8 Inch Heat Shrink Tubing 25FT

Luomorgo·9.4/10 Shop Score

i

The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A single 25 ft roll of 3/8 in black tubing with a 2:1 shrink ratio and an adhesive-lined dual wall, rated by the listing from minus 55 to plus 125 degrees C.

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Pros

• 25 ft of tubing in one roll
• Adhesive liner melts into a full seal around the joint
• Withstands minus 55 to plus 125 degrees C stated
• Wall thickness 0.2 to 0.4 mm before shrinking

Cons

• No warranty term is stated
• Single 3/8 in diameter only
• No storage case is stated
• No dielectric or tensile figures are stated

Compared on paper

*Specs such as CFM, PSI and torque are the manufacturer’s ratings as listed, collected 11 November 2026. Shrink ratio is the ratio of the tube diameter before and after heating, as each listing states it.

How the points were given

Each kit is scored on performance, build, value, safety and warranty, with the weights published on the How We Pick page. A stated electrical listing for the whole kit earns full safety points, and stated insulation figures such as dielectric strength earn part of them. No kit here states a warranty term, so no warranty points were given.

Shop Scores range from a low of 9.2 to a high of 9.8, with each tool positioned by its weighted points proportionally, and more points always yields a higher score.

What the listings tell you

Four black heat shrink tubing listings were read for this guide. Every listing states a shrink ratio and a set of tube diameters. Two kits state an adhesive liner that melts and seals as the tube shrinks, and three of the four include a storage case or a single long roll. No listing states a warranty term, and none states a UL, ETL or CSA listing. The widest tube diameter stated is 3/4 in, in the HRYSPN kit, and the smallest is 1/24 in, in the innhom kit. Measure the cable first, then pick a tube that slides over it before shrinking.

Buying guide: best black heat shrink tubing for 35 mm cable

Shrink ratio

A 2:1 tube shrinks to half its diameter, which suits joints where the connector is only a little wider than the cable. A 4:1 tube shrinks to a quarter of its diameter, which suits lugs and connectors much wider than the cable. Only the HRYSPN kit here states 4:1; the other three state 2:1.

Size range

Kits cover a spread of diameters so one box handles several cable sizes. The innhom kit lists 8 sizes, the Rindion and HRYSPN kits list 7 sizes each, and the Luomorgo roll comes in a single 3/8 in diameter. The tube must slide over the joint before heating, then shrink tight around it.

Adhesive liner

Dual-wall tubing with an adhesive liner melts the inner layer as it shrinks, sealing the joint against moisture and corrosion. This is heat shrink tubing with sealant built in. The HRYSPN and Luomorgo kits state an adhesive liner; the innhom and Rindion kits do not state one.

Heat source

A heat gun is the usual way to shrink these tubes, and the listings here state a heat gun range of 80 to 125 degrees C for the Rindion and HRYSPN kits. The innhom kit states a minimum shrink temperature of 70 degrees C. Heat the tube evenly and keep the gun moving.

Electrical safety

Heat shrink tubing insulates a joint, and the innhom listing backs that with a dielectric strength over 20 kV per mm and a tensile strength of 14 Mpa. Disconnect the battery before working on car wiring, and use a licensed electrician for household wiring. Never work on a live circuit.

Garage Fit Check

• Two of the kits here come in a storage case; keep the pieces sorted by size so the right diameter is easy to find.
• Check the tube diameter against the cable before cutting or heating anything.
• A heat gun and a clear bench space are all the room this job needs.
• Store the 25 ft roll flat or hung, so it does not kink before use.

FAQ: garage tools

What heat shrink tubing to use?

Match the tube diameter to the cable and the joint, then pick the shrink ratio for the connector: 2:1 for joints close to the cable size, 4:1 for lugs much wider than the cable. Kits with several sizes cover more jobs.

How much heat for shrink wrap?

The Rindion and HRYSPN listings state a heat gun range of 80 to 125 degrees C, and the innhom listing states a minimum shrink temperature of 70 degrees C. Heat evenly until the tube grips the joint, then let it cool.

How hot does heat shrink tubing need to be?

Hot enough to shrink fully and, where an adhesive liner is stated, to melt the liner into a seal. The Rindion and HRYSPN listings state 80 to 125 degrees C, and the Luomorgo listing states the tubing withstands minus 55 to plus 125 degrees C once shrunk.

How hot to shrink heat shrink tubing?

Use the range the listing states for that kit: 80 to 125 degrees C for the Rindion and HRYSPN kits, and a minimum of 70 degrees C for the innhom kit. A heat gun gives even heat; keep it moving.

What is heat shrink wrap?

Heat shrink wrap is electric heat shrink tubing that shrinks when heated, gripping a wire, cable or solder joint and insulating it. Some kits add an adhesive liner that seals the joint as the tube shrinks. All four kits here are black.

Related: black heat shrink tubing for cable 35 mm, the best heat shrink butt connectors for 22-18 gauge wire and the best automotive multimeter for car audio.