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 | Marine Grade, Dual Wall, Industrial Waterproof Black Shrink Wrap Tubing, Wire Insulation, for Automotive, Electrical Repairs

Product ID: 525565087

Details

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

⚡Adhesive-lined for instant, durable insulation

💧Dual-wall waterproof & abrasion resistant

🔥3:1 shrink ratio for tight seal

40619CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Seal it like a pro, shrink it like a boss! ⚡

TRUSTED BY THOUSANDS - Ranked #2 in Industrial Heat-Shrink Tubing with 4.7-star rating from over 33,000 users—join the pros who rely on Eventronic.
VERSATILE SIZE RANGE - Includes 7 popular diameters pre-cut to 1.77 inches, perfect for automotive, marine, and DIY electrical projects.
SHRINK FAST SEAL TIGHT - 3:1 shrink ratio contracts tubing to one-third size, ensuring a professional, leak-proof fit every time.
BUILT TO BRAVE THE ELEMENTS - Dual-wall design offers marine-grade abrasion resistance and a waterproof inner seal for ultimate durability.
INSTANT ADHESIVE ACTIVATION - Heat triggers adhesive lining that bonds instantly, creating a reliable, moisture-proof connection.

The Eventronic 400Pcs Heat Shrink Tubing Kit features a superior 3:1 shrink ratio with fast contraction speed, dual-wall marine-grade construction for abrasion and waterproof protection, and an adhesive lining that activates with heat for instant, durable insulation. With 7 versatile sizes pre-cut for convenience, this kit is ideal for automotive, marine, and electrical repairs, trusted by thousands of professionals and DIY enthusiasts alike.

Specifications

ASIN	B0BVVMCY86
Best Sellers Rank	#341 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Industrial Heat-Shrink Tubing
Brand	Eventronic
Color	Black
Customer Reviews	4.7 4.7 out of 5 stars (33,717)
Enclosure Material	polyolefin
Indoor Outdoor Usage	Outdoor
Installation Type	Self-Adhesive
Manufacturer	Eventronic
Mfr Part Number	HST-400
Model Number	HST-400
Number of Pieces	400
Style Name	Heat Shrink Tubing
Unit Count	400 Count
Warranty Description	No

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40619CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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