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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400Pcs Heat Shrink Tubing Kit, 3:1 Adhesive Lined Wire Shrink Wrap tubing

400Pcs Heat Shrink Tubing Kit, 3:1 Adhesive Lined Wire Shrink Wrap tubing

Product ID: 525565087

Details

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

💧Adhesive-lined waterproof seal

🔥3:1 shrink ratio for tight seal

⏱️Fast contraction in seconds

145.12 DT

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Description

🔥 Seal it tight, seal it right — professional-grade shrink tubing for the savvy DIYer!

SIZE MATTERS - 7 versatile sizes pre-cut to 1.77 inches, covering all your wiring needs without the guesswork.
SPEEDY SETUP - Heats and seals connections within seconds—get your projects done faster and cleaner.
DUAL WALL DEFENSE - Outer abrasion-resistant layer + inner waterproof adhesive for ultimate durability and protection.
SHRINK LIKE A PRO - 3:1 ratio shrinks tubing to a third of its size for a flawless, tight fit every time.
VERSATILITY UNLEASHED - Perfect for automotive, marine, DIY, and even stylish gifts—because your projects deserve the best.

This 400-piece heat shrink tubing kit features a superior 3:1 shrink ratio with fast contraction speed, ensuring a tight, professional seal. Its dual-wall design combines abrasion resistance with a waterproof adhesive lining, making it ideal for automotive, marine, and electrical repairs. With 7 commonly used sizes pre-cut for convenience, this kit offers versatile, durable insulation solutions that elevate any wiring project.

Specifications

ASIN	B0BVVMCY86
Best Sellers Rank	#542 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Industrial Heat-Shrink Tubing
Date First Available	February 15, 2023
Item Weight	11.3 ounces
Item model number	HST-400
Manufacturer	Eventronic
Product Dimensions	0.39 x 0.39 x 0.39 inches

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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145.12 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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