Is the diameter on each tube the original size (pre-shrinking)?

Yes.Size is before shrinking,3/32 shrinks to 0.8mm. 1/8 shrinks to 1.1mm. 3/16 shrinks to 1.6mm. 1/4 shrinks to 2.1mm. 3/8 shrinks to 3.2mm. 1/2 shrinks to 4.2mm. 3/4 shrinks to 6.0mm

Can this be used to join two tubes together? Does the glue just seal the ends or the entire tube?

If the tubes and the heat shrink tubes fit snugly after heating them I'm sure it would work well. This is very durable heat shrink, thicker than most. Keep in mind also, it's 3:1 shrink. Glue throughout the tubing.

What is the max temperature on these heat shrink tubes? Can I put it in the car engine bay?

Operating temperature: -55℃～125℃.They can be used in an engine bay.

Our heat shrink tubing kits are produced in China,but I can say after using these on a number of projects and boat rewiring they don't leak or seem to be affected by oil/gas/saltwater,and they've held up over time which is all that matters.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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400 Pcs Heat Shrink Tubing Kit-3:1 Ratio Adhesive Lined,Marine Grade Shrink Wrap - Industrial Heat-Shrink Tubing - Black

400 Pcs Heat Shrink Tubing Kit-3:1 Ratio Adhesive Lined,Marine Grade Shrink Wrap - Industrial Heat-Shrink Tubing - Black

Product ID: 525565087

Details

Brand
Eventronic
Color
Black
Installation Type
Self-Adhesive
Material
polyolefin
Style
Heat Shrink

💧Adhesive lining ensures waterproof bond

🔥3:1 shrink ratio for tight seal

🛠️7 versatile sizes, pre-cut for convenience

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VT6603

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Brand
Eventronic
Color
Black
Installation Type
Self-Adhesive

Description

🔥 Seal it tight, protect it right — the ultimate shrink wrap kit for pros! 🛠️

BUILT TO LAST - Dual-wall construction offers superior abrasion resistance and strain relief, perfect for marine, automotive, and industrial use.
SHRINK LIKE A PRO - 3:1 ratio shrinks tubing to a third of its size for a rock-solid, professional-grade seal every time.
WATERPROOF WONDER - Adhesive-lined inner wall melts to create a durable, moisture-proof barrier that protects your connections from corrosion and wear.
READY WHEN YOU ARE - 400 pre-cut pieces in 7 essential sizes mean no more hunting for the right fit—just grab, heat, and seal in seconds.
VERSATILITY MEETS RELIABILITY - From DIY projects to professional repairs, this marine-grade kit handles electrical insulation, environmental sealing, and surface protection with ease.

The Eventronic 400 Pcs Heat Shrink Tubing Kit features a superior 3:1 shrink ratio with fast contraction speed, ensuring a tight, professional seal. Its adhesive-lined dual-wall tubing provides waterproof, abrasion-resistant insulation ideal for marine, automotive, and industrial applications. With 7 commonly used sizes pre-cut to 1.77 inches, this kit offers versatile, reliable protection for all your wiring needs.

Specifications

ASIN	B0BVVMCY86
Best Sellers Rank	#257 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Industrial Heat-Shrink Tubing
Brand	Eventronic
Color	Black
Customer Reviews	4.7 out of 5 stars 33,262 Reviews
Enclosure Material	polyolefin
Indoor Outdoor Usage	Outdoor
Indoor/Outdoor Usage	Outdoor
Installation Type	Self-Adhesive
Manufacturer	Eventronic
Material	polyolefin
Mfr Part Number	HST-400
Model Number	HST-400
Number of Pieces	400
Style	Heat Shrink Tubing
Style Name	Heat Shrink Tubing
Unit Count	400.0 Count
Warranty Description	No

Reviews

L**S

13.04.2026

D**C

20.02.2026

A**R

11.04.2026

M**I

27.12.2025

T**E

19.04.2026

J**R

25.03.2026

B**Y

29.04.2026

J**H

24.04.2026

M**S

30.12.2025

P**.

12.09.2025

E**R

26.03.2024

J**Y

7.06.2023

R**N

24.03.2026

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VT6603

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In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

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